Page 1
HYDROLOGY REPORT
PACIFIC CENTER Anaheim, California
Prepared for
Hines Company 4000 MacArthur Blvd. Suite 110 Newport Beach, CA 92660 949.313.2230 Prepared by
Fuscoe Engineering, Inc. 16795 Von Karman, Suite 100 Irvine, California 92606 949.474.1960 www.fuscoe.com Project Manager: Mark Nero, P.E.
Date Prepared: August 2017
Job Number: 1253-002-01
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PACIFIC CENTER H yd r o l ogy R epo r t – A ugu s t 2017
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PACIFIC CENTER H yd r o l ogy R epo r t , Au gu s t 2017
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HYDROLOGY REPORT August 2017
Pacific Center City of Anaheim, CA
F:\Projects\1253\002\_Support Files\Reports\Hydrology\Hydrology Report August 2017.docx
Table of Contents
1.0 INTRODUCTION 1
1.1 Geographic Setting ...........................................................................................1
1.2 Project Description ............................................................................................1
1.3 Purpose of This Report .......................................................................................1
1.4 References .......................................................................................................2
2.0 EXISTING TOPOGRAPHIC & HYDROLOGIC CONDITIONS 3
2.1 Existing Topography ..........................................................................................3
2.2 Existing On-site Drainage Pattern and Facilities ....................................................3
3.0 PROPOSED ON-SITE DRAINAGE FACILITIES 3
4.0 HYDROLOGY STUDY 5
4.1 Storm Frequency ...............................................................................................5
4.2 Methodology ....................................................................................................5
5.0 DESIGN CRITERIA 5
6.0 RESULTS AND CONCLUSIONS 6
6.1 Conclusions .....................................................................................................6
6.2 Run-Off Comparison Chart ................................................................................7
7.0 APPENDICES 8
Appendix 1 Site Location Map
Appendix 2 10-Year Hydrology Study, Existing Condition Appendix 2.1 25-Year Hydrology Study, Existing Condition Appendix 2.2 100-Year Hydrology Study, Existing Condition
Appendix 3 10-Year Hydrology Study, Proposed Condition Appendix 3.1 25-Year Hydrology Study, Proposed Condition Appendix 3.2 100-Year Hydrology Study, Proposed Condition
Appendix 4 Soils Map Excerpt
Appendix 5 Hydrology Maps (Existing & Proposed) – in pocket
Appendix 6 FEMA Map
Appendix 7 Preliminary Analysis of Detention Requirements
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HYDROLOGY REPORT August 2017
Pacific Center 1 City of Anaheim, CA
1.0 INTRODUCTION
1.1 GEOGRAPHIC SETTING
The site, known as “Pacific Center”, is located in the easterly portion of the City of Anaheim at the southwest corner of La Palma Avenue and Tustin Avenue. It is bounded on the west by “Burlington Northern/Santa Fe Railroad” and on the south by The Riverside Freeway (Hwy. 91) and is only a few hundred feet north of The Santa Ana River. The site is presently occupied by several businesses, including a furniture store, a hotel, office buildings, a bank and several restaurants. See Project Site Location Map in Appendix 1.
1.2 PROJECT DESCRIPTION
The proposed project consists of 3 sites: Site ‘A’, Site ‘B’, and Site ‘C’. See Project Site Location Map in Appendix 1. Site ‘A’ and Site ‘B’ which covers only a portion of “Pacific Center,” consists of the addition of approximately 400 apartment units, covered parking structures, swimming pools and landscape improvements. Site ‘C’ consists of reconfiguring and reconstructing the existing retail parking lot and adding a building pad for future building. Existing retail businesses using this parking lot will remain.
1.3 PURPOSE OF THIS REPORT
The purpose of this report is to accomplish the following objectives:
• To determine pre-development and post-developed storm water discharges generated within the project area for determination of design feasibility, detention requirements, constructability and impact on existing facilities. (See Hydrology Studies in Appendix 2 and 3).
• To demonstrate that the "storm water" and "flood" protection goals as outlined in The Orange County Hydrology Manual can be met.
• To establish that there are no significant impacts to the surrounding facilities and properties because of this proposed development.
• To determine site detention requirements, if any, for the project.
• To provide data for the design of size storm water inlet/outlet and conveyance facilities to support the project.
Ponding exhibits, to meet secondary overflow requirements, will be provided on more detailed reports at Precise Grading Plan submittals.
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HYDROLOGY REPORT August 2017
Pacific Center 2 City of Anaheim, CA
1.4 REFERENCES
• Orange County Hydrology Manual, 1986
• Orange County Local Drainage Manual, 1986
• Record Plans, documents and GIS information from the City of Anaheim
• Record Plans, documents and GIS information from the County of Orange
• Record Plans and documents from Caltrans
• City of Anaheim “Master Plan of Drainage for North and West Santa Ana River Tributary Areas”
• City of Anaheim “Orange County Hydrology Manual Revisions, Deletions, and Additions,” August 2005
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HYDROLOGY REPORT August 2017
Pacific Center 3 City of Anaheim, CA
2.0 EXISTING TOPOGRAPHIC & HYDROLOGIC CONDITIONS
2.1 EXISTING TOPOGRAPHY
The project site is relatively flat with the highest point being at the northwest corner of the site at La Palma Avenue and the railroad. The site generally slopes southwesterly, but there is a small portion thereof that flows north to La Palma Avenue and east to Tustin Avenue. Except for a small underground storm drain (12” to 18”) along the southern boundary, public and/or underground storm drain facilities are practically non-existent on the site, as the site relies almost solely on surface drainage. The site is almost completely improved with buildings, parking, local streets and drives.
2.2 EXISTING ON-SITE DRAINAGE PATTERN AND FACILITIES
Refer to the Hydrology Maps in Appendix 5 for graphical locations of the items described in the following sections. Drainage on the site follows the existing topography of the land, with existing drainage patterns as follows: The general direction of flow of the site is from northeast to southwest where flow is delivered to the corner of the site near the intersection of Highway 91 and the railroad. The runoff from the site is transported almost entirely by surface devices – streets, drives, curb and gutters, “V” gutters, rectangular channels, etc. In addition to the “small” storm drain mentioned above, there exists near the southwest corner of the site, a double 24” RCP culvert (with headwalls) and a 42” RCP “stub” from the Highway 91 right-of-way. Portion of the existing retail area flows north to La Palma Avenue and east to Tustin Avenue. Majority of the runoff flows on the surface toward either curb & gutters or parkway culvert which directs the runoff to gutters on La Palma Avenue and Tustin Avenue. See Appendix 4 for Plate “A” of the Orange County Soil map, showing the hydrological soil type for the project as type A.
3.0 PROPOSED ON-SITE DRAINAGE FACILITIES The developed project matches the historic drainage pattern flow of the existing conditions, with the majority of the runoff heading toward the southwest corner of the site and a small portion (existing retail area) flowing toward either La Palma Avenue or Tustin Avenue. It is anticipated that flow originating on the site and moving on the surface southwesterly will be picked up in improved devices constructed along the west boundary (common with the railroad R/W) and directed to the south toward the existing 42” RCP storm drain pipe. It is also anticipated that two (2) east-to-west underground connector pipes will be constructed to convey flow from and through the new development to the proposed on-grade facilities to be constructed along the west boundary of the site.
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HYDROLOGY REPORT August 2017
Pacific Center 4 City of Anaheim, CA
A large majority of the Storm water runoff from this project will be conveyed and discharged into an existing detention basin at the southwest corner of the site. A small percentage of runoff will occur from the north side of the apartment building on site A. This runoff will be detained via an underground storage area and discharged at a rate not exceeding the existing runoff rate.
The preliminary sizing for the storage volume for this project was determined using the small area hydrograph as described in Section J of the Orange County hydrology manual. This estimation is sufficient for watersheds whose time of concentration is less than 25 minutes duration. This project meets the requirements for use of the small area hydrograph as Tc values are on the order of 15 minutes.
No record basin calculations are available for the current development. For purposes of this preliminary report a preliminary basin capacity analysis indicates that the current basin is adequately sized for the proposed development. A conservative value for the change in surface elevation during the peak 25-year storm event calculates at less than 6” using only the bottom area of the basin and disregarding the side slopes and extended “fingers” of the basin. The basin has a storage capacity of approximately 80,000 cubic feet before fully cresting at the culvert inlet. The basin appears to be sized for back to back storms, which is typical for control structures. See the basin capacity calculations at the end of appendix 7. A full depth/discharge analysis will be done for the final hydrology report to be submitted with the precise grading plan documents.
When the existing retail parking lot has been re-configured and re-constructed, a portion of the runoff will still surface drain towards La Palma Avenue and Tustin Avenue. The other portion of the retail parking lot will surface flow towards pervious pavement and bioretention planter which will infiltrate into the ground.
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HYDROLOGY REPORT August 2017
Pacific Center 5 City of Anaheim, CA
4.0 HYDROLOGY STUDY
4.1 STORM FREQUENCY
This study is intended to determine "local" discharges for use in the design of drainage pipes and storm runoff control structures. Consistent with the “Master Plan of Drainage for North and West Santa Ana River Tributary Areas,” a 25-year storm frequency was chosen as the minimum design criteria and piping design.
4.2 METHODOLOGY (HYDROLOGY AND HYDRAULICS)
This study utilizes Orange County Hydrology Methodology to calculate the 10-, 25-, and 100-year flowrates for the study area. All three flowrates were used in the street flow hydraulics calculations. Only the 25-year was used to size storm drains, as required by the City of Anaheim Department of Public Works: Storm Drainage Manual for Public and Private Storm Drainage Facilities, August 2005.
AES software was used to determine storm runoff for 10-, 25-, and 100-year storm events.
FlowMaster software will be used to determine preliminary hydraulic calculations to determine if existing size of pipe will have sufficient capacity to collect all the on-site runoff for the proposed conditions.
W.S.P.G. Software will be utilized to determine the H.G.L. of the storm drain system.
Hydrologic studies are included within Appendices 2 and 3 of this report for the 10-, 25-, and 100-year return frequency storms. Note: Hydrology Maps are in Appendix 5.
5.0 DESIGN CRITERIA The proposed storm drain system(s) will be designed to be consistent with the goals and guidelines as presented in the Orange County Hydrology and the Orange County Local Drainage Manuals and City of Anaheim Master Plan of Drainage. Storm drain design, including catch basin openings, is based on a 25-year frequency for overflow conditions and each basin has an acceptable overflow path away from the adjacent buildings. Recommended design water surface elevations inside area drains shall be 0.5’ below inlet grate elevation when possible. Pipe size may not be decreased downstream without the City’s approval. Branching of flow is not allowed. Area drains and appurtenant piping shall be designed in conformance with the Orange County Hydraulics Manual, as amended by City of Anaheim “Drainage Manual for Public and Private Drainage Facilities” dated August 2005.
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HYDROLOGY REPORT August 2017
Pacific Center 6 City of Anaheim, CA
6.0 RESULTS AND CONCLUSIONS
6.1 CONCLUSIONS
The analysis provided in this report provides the following conclusions: Results of peak flows (Q) for each area can be seen on the Existing and Proposed Hydrology Maps (Appendix 5). The proposed site is using similar drainage patterns as existing.
Summary of Hydraulics
Hydraulic calculations for pipes sizes and catch basin opening sizes will be prepared based on W.S.P.G. software and submitted with the submission of Grading/Drainage Plans. Hydraulics calculations will be based on the 25-year event.
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HYDROLOGY REPORT August 2017
Pacific Center 7 City of Anaheim, CA
6.2 RUN-OFF COMPARISON CHART
Existing Development vs Proposed Development (Based on “Q” = 25 Year Event)
Item Existing Proposed Difference Mitigated Flowrates
Area Flowing to La Palma Ave
3.9 Ac. 3.7 Ac. − 0.2 Ac.
Area Flowing to Tustin Ave
1.9 Ac 0.3 Ac − 1.6 Ac
Area Flowing to S.W. Corner
21.3 Ac. 20.2 Ac. − 1.1 Ac.
Area Flowing to Infiltration
0.0 Ac 3.1 Ac + 2.0 Ac
Total Area of Watershed
27.1 Ac 27.3 Ac + 0.2 Ac
“Q” Flowing to La Palma Ave
10.9 cfs 6.9 cfs - 4.1 cfs N/A
“Q” Flowing to Tustin Ave
6.5 cfs 1.0 cfs − 5.5 cfs N/A
“Q” Flowing to Infiltration
0.0 cfs 11.5 cfs + 11.5 cfs
“Q” Flowing to S.W. Corner
42.2 cfs 48.2 cfs + 5.9 cfs 42±
Total “Q” of Watershed
59.6 cfs 67.6 cfs + 8.0 cfs 60±
Ownership of Watershed Area
Pacific Center 24.5 Ac.
Burlington Northern/Santa Fe Railroad 1.6 Ac.
Caltrans/City of Anaheim 0.9 Ac
Carl’s Jr. 0.2 Ac
Taco Bell 0.3 Ac
Total: 27.5 Ac.
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HYDROLOGY REPORT August 2017
Pacific Center 8 City of Anaheim, CA
7.0 APPENDICES
Appendix 1 Site Location Map Appendix 2 10-Year Hydrology Study, Existing Condition Appendix 2.1 25-Year Hydrology Study, Existing Condition Appendix 2.2 100-Year Hydrology Study, Existing Condition Appendix 3 10-Year Hydrology Study, Proposed Condition Appendix 3.1 25-Year Hydrology Study, Proposed Condition Appendix 3.2 100-Year Hydrology Study, Proposed Condition Appendix 4 Soils Map Excerpt Appendix 5 Hydrology Maps (Existing & Proposed) – in pocket Appendix 6 FEMA Map Appendix 7 Preliminary Analysis of Detention Requirements
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HYDROLOGY REPORT August 2017
Pacific Center City of Anaheim, CA
APPENDIX 1
Site Location Map
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HYDROLOGY REPORT February 2017
Pacific Center City of Anaheim, CA
Project Site Location Map
Ken Zimmerman
Text Box
SITE 'C'
Debbie Bade
Text Box
PACIFICENTER DRIVE
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HYDROLOGY REPORT August 2017
Pacific Center City of Anaheim, CA
APPENDIX 2
10-Year Hydrology Study, Existing Condition
Page 16
PCEX10
____________________________________________________________________________
****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE
(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)
(c) Copyright 1983-2014 Advanced Engineering Software (aes)
Ver. 21.0 Release Date: 06/01/2014 License ID 1355
Analysis prepared by:
Fuscoe Engineering
16795 Von Karman Ave
Suite 100
Irvine CA, 92606
************************** DESCRIPTION OF STUDY **************************
* PACIFIC CENTER - ANAHEIM *
* EXISTING HYDROLOGY *
* 10 YEAR EVENT *
**************************************************************************
FILE NAME: PCEX10.DAT
TIME/DATE OF STUDY: 10:24 08/01/2017
============================================================================
USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
============================================================================
--*TIME-OF-CONCENTRATION MODEL*--
USER SPECIFIED STORM EVENT(YEAR) = 10.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90
*DATA BANK RAINFALL USED*
*ANTECEDENT MOISTURE CONDITION (AMC) II ASSUMED FOR RATIONAL METHOD*
*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL*
HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR
NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)
=== ===== ========= ================= ====== ===== ====== ===== =======
1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0312 0.167 0.0150
GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)
*PIPE MAY BE SIZED TO HAVE A FLOW CAPACITY LESS THAN
UPSTREAM TRIBUTARY PIPE.*
*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED
****************************************************************************
FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
Page 1
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PCEX10
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 355.00
ELEVATION DATA: UPSTREAM(FEET) = 243.40 DOWNSTREAM(FEET) = 239.40
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.809
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.144
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.87 0.40 0.100 32 7.81
PUBLIC PARK A 0.22 0.40 0.850 32 12.41
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.251
SUBAREA RUNOFF(CFS) = 2.99
TOTAL AREA(ACRES) = 1.09 PEAK FLOW RATE(CFS) = 2.99
****************************************************************************
FLOW PROCESS FROM NODE 11.00 TO NODE 12.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.40 DOWNSTREAM ELEVATION(FEET) = 238.50
STREET LENGTH(FEET) = 280.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 40.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.93
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.43
HALFSTREET FLOOD WIDTH(FEET) = 15.19
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.62
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.70
STREET FLOW TRAVEL TIME(MIN.) = 2.88 Tc(MIN.) = 10.69
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.627
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.54 0.40 0.100 32
PUBLIC PARK A 0.31 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.374
SUBAREA AREA(ACRES) = 0.85 SUBAREA RUNOFF(CFS) = 1.90
EFFECTIVE AREA(ACRES) = 1.94 AREA-AVERAGED Fm(INCH/HR) = 0.12
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PCEX10
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.30
TOTAL AREA(ACRES) = 1.9 PEAK FLOW RATE(CFS) = 4.37
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.44 HALFSTREET FLOOD WIDTH(FEET) = 15.84
FLOW VELOCITY(FEET/SEC.) = 1.66 DEPTH*VELOCITY(FT*FT/SEC.) = 0.74
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 12.00 = 635.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 238.50 DOWNSTREAM ELEVATION(FEET) = 238.00
STREET LENGTH(FEET) = 190.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.80
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.47
HALFSTREET FLOOD WIDTH(FEET) = 17.08
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.58
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.74
STREET FLOW TRAVEL TIME(MIN.) = 2.00 Tc(MIN.) = 12.69
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.381
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.21 0.40 0.100 32
PUBLIC PARK A 0.22 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.484
SUBAREA AREA(ACRES) = 0.43 SUBAREA RUNOFF(CFS) = 0.85
EFFECTIVE AREA(ACRES) = 2.37 AREA-AVERAGED Fm(INCH/HR) = 0.13
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.34
TOTAL AREA(ACRES) = 2.4 PEAK FLOW RATE(CFS) = 4.79
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.47 HALFSTREET FLOOD WIDTH(FEET) = 17.08
FLOW VELOCITY(FEET/SEC.) = 1.58 DEPTH*VELOCITY(FT*FT/SEC.) = 0.74
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 13.00 = 825.00 FEET.
****************************************************************************
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PCEX10
FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 20.00 TO NODE 21.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00
ELEVATION DATA: UPSTREAM(FEET) = 240.50 DOWNSTREAM(FEET) = 239.70
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.636
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.185
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.24 0.40 0.100 32 7.64
PUBLIC PARK A 0.14 0.40 0.850 32 12.13
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.376
SUBAREA RUNOFF(CFS) = 1.04
TOTAL AREA(ACRES) = 0.38 PEAK FLOW RATE(CFS) = 1.04
****************************************************************************
FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.70
DOWNSTREAM NODE ELEVATION(FEET) = 239.20
CHANNEL LENGTH THRU SUBAREA(FEET) = 235.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 1.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.560
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.24 0.40 0.100 32
PUBLIC PARK A 0.54 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.619
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 1.84
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.10
AVERAGE FLOW DEPTH(FEET) = 0.25 FLOOD WIDTH(FEET) = 17.34
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 3.55 Tc(MIN.) = 11.18
SUBAREA AREA(ACRES) = 0.78 SUBAREA RUNOFF(CFS) = 1.62
EFFECTIVE AREA(ACRES) = 1.16 AREA-AVERAGED Fm(INCH/HR) = 0.22
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PCEX10
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.54
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 2.45
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.28 FLOOD WIDTH(FEET) = 19.77
FLOW VELOCITY(FEET/SEC.) = 1.15 DEPTH*VELOCITY(FT*FT/SEC) = 0.32
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 435.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.20 DOWNSTREAM ELEVATION(FEET) = 238.20
STREET LENGTH(FEET) = 205.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.95
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.38
HALFSTREET FLOOD WIDTH(FEET) = 12.44
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.77
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.66
STREET FLOW TRAVEL TIME(MIN.) = 1.93 Tc(MIN.) = 13.11
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.337
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.49 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.49 SUBAREA RUNOFF(CFS) = 1.01
EFFECTIVE AREA(ACRES) = 1.65 AREA-AVERAGED Fm(INCH/HR) = 0.16
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.41
TOTAL AREA(ACRES) = 1.7 PEAK FLOW RATE(CFS) = 3.23
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.38 HALFSTREET FLOOD WIDTH(FEET) = 12.92
FLOW VELOCITY(FEET/SEC.) = 1.81 DEPTH*VELOCITY(FT*FT/SEC.) = 0.69
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 23.00 = 640.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 10
Page 5
Page 21
PCEX10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 30.00 TO NODE 31.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00
ELEVATION DATA: UPSTREAM(FEET) = 240.90 DOWNSTREAM(FEET) = 239.60
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.660
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.963
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.10 0.40 0.100 32 8.66
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.89
TOTAL AREA(ACRES) = 1.10 PEAK FLOW RATE(CFS) = 2.89
****************************************************************************
FLOW PROCESS FROM NODE 31.00 TO NODE 23.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.60 DOWNSTREAM ELEVATION(FEET) = 238.20
STREET LENGTH(FEET) = 465.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.99
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.44
HALFSTREET FLOOD WIDTH(FEET) = 15.50
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.58
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.69
STREET FLOW TRAVEL TIME(MIN.) = 4.89 Tc(MIN.) = 13.55
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.293
SUBAREA LOSS RATE DATA(AMC II):
Page 6
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PCEX10
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.08 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.08 SUBAREA RUNOFF(CFS) = 2.19
EFFECTIVE AREA(ACRES) = 2.18 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.2 PEAK FLOW RATE(CFS) = 4.42
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.45 HALFSTREET FLOOD WIDTH(FEET) = 16.14
FLOW VELOCITY(FEET/SEC.) = 1.62 DEPTH*VELOCITY(FT*FT/SEC.) = 0.73
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 4.42 13.55 2.293 0.40( 0.04) 0.10 2.2 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.
** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 3.23 13.11 2.337 0.40( 0.16) 0.41 1.7 20.00
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 23.00 = 640.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 7.59 13.11 2.337 0.40( 0.09) 0.24 3.8 20.00
2 7.58 13.55 2.293 0.40( 0.09) 0.23 3.8 30.00
TOTAL AREA(ACRES) = 3.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 7.59 Tc(MIN.) = 13.110
EFFECTIVE AREA(ACRES) = 3.76 AREA-AVERAGED Fm(INCH/HR) = 0.09
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.23
TOTAL AREA(ACRES) = 3.8
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================
Page 7
Page 23
PCEX10
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 13.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 238.20
DOWNSTREAM NODE ELEVATION(FEET) = 238.00
CHANNEL LENGTH THRU SUBAREA(FEET) = 75.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.75
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.260
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.08 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 7.67
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.60
AVERAGE FLOW DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 30.44
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.78 Tc(MIN.) = 13.89
SUBAREA AREA(ACRES) = 0.08 SUBAREA RUNOFF(CFS) = 0.16
EFFECTIVE AREA(ACRES) = 3.84 AREA-AVERAGED Fm(INCH/HR) = 0.09
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.23
TOTAL AREA(ACRES) = 3.9 PEAK FLOW RATE(CFS) = 7.59
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 30.31
FLOW VELOCITY(FEET/SEC.) = 1.59 DEPTH*VELOCITY(FT*FT/SEC) = 0.61
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 7.59 13.89 2.260 0.40( 0.09) 0.23 3.8 20.00
2 7.58 14.33 2.220 0.40( 0.09) 0.23 3.9 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 4.79 12.69 2.381 0.40( 0.13) 0.34 2.4 10.00
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 13.00 = 825.00 FEET.
Page 8
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PCEX10
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 12.10 12.69 2.381 0.40( 0.11) 0.27 5.9 10.00
2 12.12 13.89 2.260 0.40( 0.11) 0.27 6.2 20.00
3 12.03 14.33 2.220 0.40( 0.11) 0.27 6.3 30.00
TOTAL AREA(ACRES) = 6.3
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 12.12 Tc(MIN.) = 13.892
EFFECTIVE AREA(ACRES) = 6.21 AREA-AVERAGED Fm(INCH/HR) = 0.11
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.27
TOTAL AREA(ACRES) = 6.3
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 238.00 DOWNSTREAM ELEVATION(FEET) = 237.00
STREET LENGTH(FEET) = 320.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 13.06
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.61
HALFSTREET FLOOD WIDTH(FEET) = 29.77
AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.07
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 1.27
STREET FLOW TRAVEL TIME(MIN.) = 2.57 Tc(MIN.) = 16.46
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.051
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.04 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
Page 9
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PCEX10
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.04 SUBAREA RUNOFF(CFS) = 1.88
EFFECTIVE AREA(ACRES) = 7.25 AREA-AVERAGED Fm(INCH/HR) = 0.10
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.25
TOTAL AREA(ACRES) = 7.3 PEAK FLOW RATE(CFS) = 12.73
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.61 HALFSTREET FLOOD WIDTH(FEET) = 29.30
FLOW VELOCITY(FEET/SEC.) = 2.07 DEPTH*VELOCITY(FT*FT/SEC.) = 1.25
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 14.00 = 1150.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 40.00 TO NODE 41.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00
ELEVATION DATA: UPSTREAM(FEET) = 241.70 DOWNSTREAM(FEET) = 240.70
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.127
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.876
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.68 0.40 0.100 32 9.13
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.74
TOTAL AREA(ACRES) = 0.68 PEAK FLOW RATE(CFS) = 1.74
****************************************************************************
FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.70 DOWNSTREAM ELEVATION(FEET) = 239.50
STREET LENGTH(FEET) = 260.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
Page 10
Page 26
PCEX10
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.01
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.34
HALFSTREET FLOOD WIDTH(FEET) = 10.70
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.59
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.54
STREET FLOW TRAVEL TIME(MIN.) = 2.72 Tc(MIN.) = 11.85
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.476
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.25 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.25 SUBAREA RUNOFF(CFS) = 0.55
EFFECTIVE AREA(ACRES) = 0.93 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 2.04
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.34 HALFSTREET FLOOD WIDTH(FEET) = 10.81
FLOW VELOCITY(FEET/SEC.) = 1.59 DEPTH*VELOCITY(FT*FT/SEC.) = 0.54
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 43.00 TO NODE 44.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.20
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.358
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.835
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.73 0.40 0.100 32 9.36
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 4.35
Page 11
Page 27
PCEX10
TOTAL AREA(ACRES) = 1.73 PEAK FLOW RATE(CFS) = 4.35
****************************************************************************
FLOW PROCESS FROM NODE 44.00 TO NODE 42.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 240.20
DOWNSTREAM NODE ELEVATION(FEET) = 239.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 155.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.75
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.617
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.17 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 5.71
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.85
AVERAGE FLOW DEPTH(FEET) = 0.32 FLOOD WIDTH(FEET) = 24.19
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.40 Tc(MIN.) = 10.76
SUBAREA AREA(ACRES) = 1.17 SUBAREA RUNOFF(CFS) = 2.71
EFFECTIVE AREA(ACRES) = 2.90 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.9 PEAK FLOW RATE(CFS) = 6.73
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.34 FLOOD WIDTH(FEET) = 25.81
FLOW VELOCITY(FEET/SEC.) = 1.92 DEPTH*VELOCITY(FT*FT/SEC) = 0.65
LONGEST FLOWPATH FROM NODE 43.00 TO NODE 42.00 = 485.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 6.73 10.76 2.617 0.40( 0.04) 0.10 2.9 43.00
LONGEST FLOWPATH FROM NODE 43.00 TO NODE 42.00 = 485.00 FEET.
** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 2.04 11.85 2.476 0.40( 0.04) 0.10 0.9 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.
Page 12
Page 28
PCEX10
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 8.68 10.76 2.617 0.40( 0.04) 0.10 3.7 43.00
2 8.40 11.85 2.476 0.40( 0.04) 0.10 3.8 40.00
TOTAL AREA(ACRES) = 3.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 8.68 Tc(MIN.) = 10.756
EFFECTIVE AREA(ACRES) = 3.74 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 3.8
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 45.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.50
DOWNSTREAM NODE ELEVATION(FEET) = 239.20
CHANNEL LENGTH THRU SUBAREA(FEET) = 50.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.568
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.28 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 9.00
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.29
AVERAGE FLOW DEPTH(FEET) = 0.35 FLOOD WIDTH(FEET) = 27.45
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.36 Tc(MIN.) = 11.12
SUBAREA AREA(ACRES) = 0.28 SUBAREA RUNOFF(CFS) = 0.64
EFFECTIVE AREA(ACRES) = 4.02 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.1 PEAK FLOW RATE(CFS) = 9.15
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 27.76
FLOW VELOCITY(FEET/SEC.) = 2.28 DEPTH*VELOCITY(FT*FT/SEC) = 0.81
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 45.00 = 600.00 FEET.
Page 13
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PCEX10
****************************************************************************
FLOW PROCESS FROM NODE 45.00 TO NODE 46.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.20
DOWNSTREAM NODE ELEVATION(FEET) = 238.00
CHANNEL LENGTH THRU SUBAREA(FEET) = 330.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.251
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.70 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 9.85
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.91
AVERAGE FLOW DEPTH(FEET) = 0.40 FLOOD WIDTH(FEET) = 31.56
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 2.87 Tc(MIN.) = 13.99
SUBAREA AREA(ACRES) = 0.70 SUBAREA RUNOFF(CFS) = 1.39
EFFECTIVE AREA(ACRES) = 4.72 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.8 PEAK FLOW RATE(CFS) = 9.40
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.39 FLOOD WIDTH(FEET) = 30.96
FLOW VELOCITY(FEET/SEC.) = 1.90 DEPTH*VELOCITY(FT*FT/SEC) = 0.74
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 46.00 = 930.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 46.00 TO NODE 47.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 238.00
DOWNSTREAM NODE ELEVATION(FEET) = 237.60
CHANNEL LENGTH THRU SUBAREA(FEET) = 170.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.105
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.10 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 10.42
Page 14
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PCEX10
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.64
AVERAGE FLOW DEPTH(FEET) = 0.43 FLOOD WIDTH(FEET) = 35.22
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.73 Tc(MIN.) = 15.72
SUBAREA AREA(ACRES) = 1.10 SUBAREA RUNOFF(CFS) = 2.04
EFFECTIVE AREA(ACRES) = 5.82 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 5.9 PEAK FLOW RATE(CFS) = 10.83
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.44 FLOOD WIDTH(FEET) = 35.83
FLOW VELOCITY(FEET/SEC.) = 1.64 DEPTH*VELOCITY(FT*FT/SEC) = 0.72
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 47.00 = 1100.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 47.00 TO NODE 47.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 15.72
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.105
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.33 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.33 SUBAREA RUNOFF(CFS) = 0.61
EFFECTIVE AREA(ACRES) = 6.15 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 6.2 PEAK FLOW RATE(CFS) = 11.44
****************************************************************************
FLOW PROCESS FROM NODE 47.00 TO NODE 14.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 237.60
DOWNSTREAM NODE ELEVATION(FEET) = 237.00
CHANNEL LENGTH THRU SUBAREA(FEET) = 220.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 1.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 1.962
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.50 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 11.87
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.78
AVERAGE FLOW DEPTH(FEET) = 0.44 FLOOD WIDTH(FEET) = 36.11
Page 15
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PCEX10
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 2.07 Tc(MIN.) = 17.79
SUBAREA AREA(ACRES) = 0.50 SUBAREA RUNOFF(CFS) = 0.86
EFFECTIVE AREA(ACRES) = 6.65 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 6.7 PEAK FLOW RATE(CFS) = 11.51
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.44 FLOOD WIDTH(FEET) = 35.59
FLOW VELOCITY(FEET/SEC.) = 1.77 DEPTH*VELOCITY(FT*FT/SEC) = 0.77
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 11.51 17.79 1.962 0.40( 0.04) 0.10 6.7 43.00
2 11.24 18.94 1.892 0.40( 0.04) 0.10 6.7 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 12.72 15.26 2.142 0.40( 0.10) 0.25 6.9 10.00
2 12.73 16.46 2.051 0.40( 0.10) 0.25 7.2 20.00
3 12.66 16.91 2.020 0.40( 0.10) 0.25 7.3 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 14.00 = 1150.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 23.51 15.26 2.142 0.40( 0.07) 0.18 12.6 10.00
2 23.88 16.46 2.051 0.40( 0.07) 0.18 13.4 20.00
3 23.92 16.91 2.020 0.40( 0.07) 0.18 13.6 30.00
4 23.78 17.79 1.962 0.40( 0.07) 0.18 14.0 43.00
5 23.05 18.94 1.892 0.40( 0.07) 0.18 14.1 40.00
TOTAL AREA(ACRES) = 14.1
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 23.92 Tc(MIN.) = 16.910
EFFECTIVE AREA(ACRES) = 13.65 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18
TOTAL AREA(ACRES) = 14.1
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 1 <<<<<
Page 16
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PCEX10
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 14.00 TO NODE 15.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.00 DOWNSTREAM(FEET) = 235.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 145.00 CHANNEL SLOPE = 0.0131
CHANNEL FLOW THRU SUBAREA(CFS) = 23.92
FLOW VELOCITY(FEET/SEC) = 3.60 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 0.67 Tc(MIN.) = 17.58
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 15.00 = 1465.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 15.00 TO NODE 15.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 17.58
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 1.975
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.16 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.24
EFFECTIVE AREA(ACRES) = 13.81 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 14.2 PEAK FLOW RATE(CFS) = 23.92
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 15.00 TO NODE 15.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 17.58
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 1.975
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.25 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.25 SUBAREA RUNOFF(CFS) = 2.18
EFFECTIVE AREA(ACRES) = 15.06 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18
TOTAL AREA(ACRES) = 15.5 PEAK FLOW RATE(CFS) = 25.79
****************************************************************************
Page 17
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PCEX10
FLOW PROCESS FROM NODE 15.00 TO NODE 16.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.10 DOWNSTREAM(FEET) = 234.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 205.00 CHANNEL SLOPE = 0.0049
CHANNEL FLOW THRU SUBAREA(CFS) = 25.79
FLOW VELOCITY(FEET/SEC) = 2.24 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 1.52 Tc(MIN.) = 19.10
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 19.10
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 1.883
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.30 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.42
EFFECTIVE AREA(ACRES) = 15.36 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 15.8 PEAK FLOW RATE(CFS) = 25.79
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 245.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.50
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.248
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.047
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.84 0.40 0.100 32 8.25
Page 18
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PCEX10
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.27
TOTAL AREA(ACRES) = 0.84 PEAK FLOW RATE(CFS) = 2.27
****************************************************************************
FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 238.00 DOWNSTREAM(FEET) = 237.50
FLOW LENGTH(FEET) = 125.00 MANNING'S N = 0.011
DEPTH OF FLOW IN 12.0 INCH PIPE IS 8.9 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 3.64
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 2.27
PIPE TRAVEL TIME(MIN.) = 0.57 Tc(MIN.) = 8.82
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 52.00 = 370.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 52.00 TO NODE 52.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 8.82
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.932
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.28 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.28 SUBAREA RUNOFF(CFS) = 3.33
EFFECTIVE AREA(ACRES) = 2.12 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.1 PEAK FLOW RATE(CFS) = 5.52
****************************************************************************
FLOW PROCESS FROM NODE 52.00 TO NODE 53.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.50
FLOW LENGTH(FEET) = 330.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 7.03
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 5.52
PIPE TRAVEL TIME(MIN.) = 0.78 Tc(MIN.) = 9.60
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 53.00 = 700.00 FEET.
Page 19
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PCEX10
****************************************************************************
FLOW PROCESS FROM NODE 53.00 TO NODE 53.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.60
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.793
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.63 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.63 SUBAREA RUNOFF(CFS) = 4.04
EFFECTIVE AREA(ACRES) = 3.75 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 3.8 PEAK FLOW RATE(CFS) = 9.29
****************************************************************************
FLOW PROCESS FROM NODE 53.00 TO NODE 54.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.50 DOWNSTREAM(FEET) = 236.30
FLOW LENGTH(FEET) = 30.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 11.83
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 9.29
PIPE TRAVEL TIME(MIN.) = 0.04 Tc(MIN.) = 9.65
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 54.00 = 730.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 54.00 TO NODE 54.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.65
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.786
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.49 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.49 SUBAREA RUNOFF(CFS) = 1.21
EFFECTIVE AREA(ACRES) = 4.24 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.2 PEAK FLOW RATE(CFS) = 10.48
Page 20
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PCEX10
****************************************************************************
FLOW PROCESS FROM NODE 54.00 TO NODE 55.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.30 DOWNSTREAM(FEET) = 235.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00 CHANNEL SLOPE = 0.0050
CHANNEL FLOW THRU SUBAREA(CFS) = 10.48
FLOW VELOCITY(FEET/SEC) = 1.79 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 1.49 Tc(MIN.) = 11.14
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 55.00 = 890.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 11.14
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.566
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.31 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.31 SUBAREA RUNOFF(CFS) = 0.70
EFFECTIVE AREA(ACRES) = 4.55 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.5 PEAK FLOW RATE(CFS) = 10.48
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 11.14
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.566
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.19 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.19 SUBAREA RUNOFF(CFS) = 0.38
EFFECTIVE AREA(ACRES) = 4.74 AREA-AVERAGED Fm(INCH/HR) = 0.05
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13
TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 10.72
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 16.00 IS CODE = 52
----------------------------------------------------------------------------
Page 21
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PCEX10
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.50 DOWNSTREAM(FEET) = 234.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 255.00 CHANNEL SLOPE = 0.0055
CHANNEL FLOW THRU SUBAREA(CFS) = 10.72
FLOW VELOCITY(FEET/SEC) = 1.88 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 2.25 Tc(MIN.) = 13.39
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 16.00 = 1145.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 13.39
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.308
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.29 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.29 SUBAREA RUNOFF(CFS) = 0.51
EFFECTIVE AREA(ACRES) = 5.03 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.17
TOTAL AREA(ACRES) = 5.0 PEAK FLOW RATE(CFS) = 10.72
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 10.72 13.39 2.308 0.40( 0.07) 0.17 5.0 50.00
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 16.00 = 1145.00 FEET.
** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 25.48 17.46 1.983 0.40( 0.08) 0.20 14.3 10.00
2 25.77 18.66 1.909 0.40( 0.08) 0.19 15.1 20.00
3 25.79 19.10 1.883 0.40( 0.08) 0.19 15.4 30.00
4 25.61 19.99 1.835 0.40( 0.08) 0.19 15.7 43.00
5 24.83 21.16 1.776 0.40( 0.08) 0.19 15.8 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
Page 22
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PCEX10
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 33.60 13.39 2.308 0.40( 0.08) 0.19 16.0 50.00
2 34.64 17.46 1.983 0.40( 0.08) 0.19 19.4 10.00
3 34.58 18.66 1.909 0.40( 0.08) 0.19 20.1 20.00
4 34.48 19.10 1.883 0.40( 0.07) 0.19 20.4 30.00
5 34.06 19.99 1.835 0.40( 0.07) 0.19 20.7 43.00
6 33.01 21.16 1.776 0.40( 0.07) 0.19 20.8 40.00
TOTAL AREA(ACRES) = 20.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 34.64 Tc(MIN.) = 17.459
EFFECTIVE AREA(ACRES) = 19.36 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 20.8
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 17.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 234.10 DOWNSTREAM(FEET) = 233.20
FLOW LENGTH(FEET) = 55.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 13.8 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 9.24
GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 2
PIPE-FLOW(CFS) = 34.64
PIPE TRAVEL TIME(MIN.) = 0.10 Tc(MIN.) = 17.56
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 17.00 = 1725.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 17.00 TO NODE 17.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 17.56
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 1.976
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.53 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.53 SUBAREA RUNOFF(CFS) = 0.78
EFFECTIVE AREA(ACRES) = 19.89 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21
TOTAL AREA(ACRES) = 21.3 PEAK FLOW RATE(CFS) = 34.64
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 80.00 TO NODE 81.00 IS CODE = 21
----------------------------------------------------------------------------
Page 23
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PCEX10
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00
ELEVATION DATA: UPSTREAM(FEET) = 243.30 DOWNSTREAM(FEET) = 240.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.672
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.176
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
PUBLIC PARK A 0.54 0.40 0.850 32 12.19
COMMERCIAL A 0.12 0.40 0.100 32 7.67
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.714
SUBAREA RUNOFF(CFS) = 1.72
TOTAL AREA(ACRES) = 0.66 PEAK FLOW RATE(CFS) = 1.72
****************************************************************************
FLOW PROCESS FROM NODE 81.00 TO NODE 82.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.10 DOWNSTREAM ELEVATION(FEET) = 238.80
STREET LENGTH(FEET) = 150.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 40.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 28.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 1.99
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.31
HALFSTREET FLOOD WIDTH(FEET) = 9.33
AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.01
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.63
STREET FLOW TRAVEL TIME(MIN.) = 1.24 Tc(MIN.) = 8.92
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.914
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.11 0.40 0.850 32
COMMERCIAL A 0.11 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.475
Page 24
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PCEX10
SUBAREA AREA(ACRES) = 0.22 SUBAREA RUNOFF(CFS) = 0.54
EFFECTIVE AREA(ACRES) = 0.88 AREA-AVERAGED Fm(INCH/HR) = 0.26
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.65
TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 2.10
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.32 HALFSTREET FLOOD WIDTH(FEET) = 9.58
FLOW VELOCITY(FEET/SEC.) = 2.03 DEPTH*VELOCITY(FT*FT/SEC.) = 0.64
LONGEST FLOWPATH FROM NODE 80.00 TO NODE 82.00 = 470.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 82.00 TO NODE 83.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 238.80 DOWNSTREAM ELEVATION(FEET) = 238.50
STREET LENGTH(FEET) = 90.00 CURB HEIGHT(INCHES) = 8.0
STREET HALFWIDTH(FEET) = 84.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 30.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.27
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.39
HALFSTREET FLOOD WIDTH(FEET) = 11.72
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.45
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.57
STREET FLOW TRAVEL TIME(MIN.) = 1.03 Tc(MIN.) = 9.95
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.737
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.16 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.35
EFFECTIVE AREA(ACRES) = 1.04 AREA-AVERAGED Fm(INCH/HR) = 0.27
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.68
TOTAL AREA(ACRES) = 1.0 PEAK FLOW RATE(CFS) = 2.31
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.39 HALFSTREET FLOOD WIDTH(FEET) = 11.78
FLOW VELOCITY(FEET/SEC.) = 1.46 DEPTH*VELOCITY(FT*FT/SEC.) = 0.58
LONGEST FLOWPATH FROM NODE 80.00 TO NODE 83.00 = 560.00 FEET.
Page 25
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PCEX10
****************************************************************************
FLOW PROCESS FROM NODE 90.00 TO NODE 91.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 280.00
ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.937
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.910
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.64 0.40 0.100 32 8.94
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.65
TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 1.65
****************************************************************************
FLOW PROCESS FROM NODE 91.00 TO NODE 92.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.90 DOWNSTREAM ELEVATION(FEET) = 239.50
STREET LENGTH(FEET) = 270.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.23
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.34
HALFSTREET FLOOD WIDTH(FEET) = 10.91
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.71
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.59
STREET FLOW TRAVEL TIME(MIN.) = 2.64 Tc(MIN.) = 11.57
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.510
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.52 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
Page 26
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PCEX10
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.52 SUBAREA RUNOFF(CFS) = 1.16
EFFECTIVE AREA(ACRES) = 1.16 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 2.58
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.36 HALFSTREET FLOOD WIDTH(FEET) = 11.59
FLOW VELOCITY(FEET/SEC.) = 1.76 DEPTH*VELOCITY(FT*FT/SEC.) = 0.63
LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 92.00 TO NODE 92.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 100.00 TO NODE 101.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 295.00
ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.221
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.859
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.79 0.40 0.100 32 9.22
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.00
TOTAL AREA(ACRES) = 0.79 PEAK FLOW RATE(CFS) = 2.00
****************************************************************************
FLOW PROCESS FROM NODE 101.00 TO NODE 92.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.22
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.859
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.44 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.44 SUBAREA RUNOFF(CFS) = 1.12
EFFECTIVE AREA(ACRES) = 1.23 AREA-AVERAGED Fm(INCH/HR) = 0.04
Page 27
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PCEX10
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.12
****************************************************************************
FLOW PROCESS FROM NODE 92.00 TO NODE 92.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 3.12 9.22 2.859 0.40( 0.04) 0.10 1.2 100.00
LONGEST FLOWPATH FROM NODE 100.00 TO NODE 92.00 = 295.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 2.58 11.57 2.510 0.40( 0.04) 0.10 1.2 90.00
LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 5.46 9.22 2.859 0.40( 0.04) 0.10 2.2 100.00
2 5.31 11.57 2.510 0.40( 0.04) 0.10 2.4 90.00
TOTAL AREA(ACRES) = 2.4
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 5.46 Tc(MIN.) = 9.221
EFFECTIVE AREA(ACRES) = 2.15 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.4
LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 92.00 TO NODE 93.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.50 DOWNSTREAM ELEVATION(FEET) = 239.10
STREET LENGTH(FEET) = 100.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
Page 28
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PCEX10
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 5.59
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.46
HALFSTREET FLOOD WIDTH(FEET) = 16.77
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.91
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.88
STREET FLOW TRAVEL TIME(MIN.) = 0.87 Tc(MIN.) = 10.09
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.714
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.10 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.10 SUBAREA RUNOFF(CFS) = 0.24
EFFECTIVE AREA(ACRES) = 2.25 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.5 PEAK FLOW RATE(CFS) = 5.46
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.46 HALFSTREET FLOOD WIDTH(FEET) = 16.57
FLOW VELOCITY(FEET/SEC.) = 1.91 DEPTH*VELOCITY(FT*FT/SEC.) = 0.87
LONGEST FLOWPATH FROM NODE 90.00 TO NODE 93.00 = 650.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 94.00 TO NODE 95.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 190.00
ELEVATION DATA: UPSTREAM(FEET) = 242.10 DOWNSTREAM(FEET) = 240.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.165
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.600
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.39 0.40 0.100 32 6.16
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.25
TOTAL AREA(ACRES) = 0.39 PEAK FLOW RATE(CFS) = 1.25
****************************************************************************
FLOW PROCESS FROM NODE 96.00 TO NODE 97.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
Page 29
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PCEX10
INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00
ELEVATION DATA: UPSTREAM(FEET) = 241.30 DOWNSTREAM(FEET) = 240.20
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.165
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.303
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.52 0.40 0.100 32 7.16
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.53
TOTAL AREA(ACRES) = 0.52 PEAK FLOW RATE(CFS) = 1.53
****************************************************************************
FLOW PROCESS FROM NODE 98.00 TO NODE 99.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 160.00
ELEVATION DATA: UPSTREAM(FEET) = 241.40 DOWNSTREAM(FEET) = 240.70
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.860
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.387
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.06 0.40 0.100 32 6.86
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 3.19
TOTAL AREA(ACRES) = 1.06 PEAK FLOW RATE(CFS) = 3.19
****************************************************************************
FLOW PROCESS FROM NODE 102.00 TO NODE 103.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 150.00
ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 241.30
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.029
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.647
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.27 0.40 0.100 32 6.03
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
Page 30
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PCEX10
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 0.88
TOTAL AREA(ACRES) = 0.27 PEAK FLOW RATE(CFS) = 0.88
============================================================================
END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 0.3 TC(MIN.) = 6.03
EFFECTIVE AREA(ACRES) = 0.27 AREA-AVERAGED Fm(INCH/HR)= 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.100
PEAK FLOW RATE(CFS) = 0.88
============================================================================
============================================================================
END OF RATIONAL METHOD ANALYSIS
�
Page 31
Page 47
HYDROLOGY REPORT August 2017
Pacific Center City of Anaheim, CA
APPENDIX 2.1
25-Year Hydrology Study, Existing Condition
Page 48
PCEX25
____________________________________________________________________________
****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE
(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)
(c) Copyright 1983-2014 Advanced Engineering Software (aes)
Ver. 21.0 Release Date: 06/01/2014 License ID 1355
Analysis prepared by:
Fuscoe Engineering
16795 Von Karman Ave
Suite 100
Irvine CA, 92606
************************** DESCRIPTION OF STUDY **************************
* PACIFIC CENTER - ANAHEIM *
* EXISTING HYDROLOGY *
* 25 YEAR VEVENT *
**************************************************************************
FILE NAME: PCEX25.DAT
TIME/DATE OF STUDY: 11:58 08/01/2017
============================================================================
USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
============================================================================
--*TIME-OF-CONCENTRATION MODEL*--
USER SPECIFIED STORM EVENT(YEAR) = 25.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90
*DATA BANK RAINFALL USED*
*ANTECEDENT MOISTURE CONDITION (AMC) II ASSUMED FOR RATIONAL METHOD*
*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL*
HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR
NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)
=== ===== ========= ================= ====== ===== ====== ===== =======
1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0312 0.167 0.0150
GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)
*PIPE MAY BE SIZED TO HAVE A FLOW CAPACITY LESS THAN
UPSTREAM TRIBUTARY PIPE.*
*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED
****************************************************************************
FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
Page 1
Page 49
PCEX25
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 355.00
ELEVATION DATA: UPSTREAM(FEET) = 243.40 DOWNSTREAM(FEET) = 239.40
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.809
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.748
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.87 0.40 0.100 32 7.81
PUBLIC PARK A 0.22 0.40 0.850 32 12.41
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.251
SUBAREA RUNOFF(CFS) = 3.58
TOTAL AREA(ACRES) = 1.09 PEAK FLOW RATE(CFS) = 3.58
****************************************************************************
FLOW PROCESS FROM NODE 11.00 TO NODE 12.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.40 DOWNSTREAM ELEVATION(FEET) = 238.50
STREET LENGTH(FEET) = 280.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 40.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.73
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.45
HALFSTREET FLOOD WIDTH(FEET) = 16.35
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.69
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.77
STREET FLOW TRAVEL TIME(MIN.) = 2.75 Tc(MIN.) = 10.56
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.159
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.54 0.40 0.100 32
PUBLIC PARK A 0.31 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.374
SUBAREA AREA(ACRES) = 0.85 SUBAREA RUNOFF(CFS) = 2.30
EFFECTIVE AREA(ACRES) = 1.94 AREA-AVERAGED Fm(INCH/HR) = 0.12
Page 2
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PCEX25
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.30
TOTAL AREA(ACRES) = 1.9 PEAK FLOW RATE(CFS) = 5.30
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.47 HALFSTREET FLOOD WIDTH(FEET) = 17.07
FLOW VELOCITY(FEET/SEC.) = 1.75 DEPTH*VELOCITY(FT*FT/SEC.) = 0.82
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 12.00 = 635.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 238.50 DOWNSTREAM ELEVATION(FEET) = 238.00
STREET LENGTH(FEET) = 190.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 5.82
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.49
HALFSTREET FLOOD WIDTH(FEET) = 18.43
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.66
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.82
STREET FLOW TRAVEL TIME(MIN.) = 1.91 Tc(MIN.) = 12.47
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.875
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.21 0.40 0.100 32
PUBLIC PARK A 0.22 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.484
SUBAREA AREA(ACRES) = 0.43 SUBAREA RUNOFF(CFS) = 1.04
EFFECTIVE AREA(ACRES) = 2.37 AREA-AVERAGED Fm(INCH/HR) = 0.13
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.34
TOTAL AREA(ACRES) = 2.4 PEAK FLOW RATE(CFS) = 5.84
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.50 HALFSTREET FLOOD WIDTH(FEET) = 18.49
FLOW VELOCITY(FEET/SEC.) = 1.65 DEPTH*VELOCITY(FT*FT/SEC.) = 0.82
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 13.00 = 825.00 FEET.
****************************************************************************
Page 3
Page 51
PCEX25
FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 20.00 TO NODE 21.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00
ELEVATION DATA: UPSTREAM(FEET) = 240.50 DOWNSTREAM(FEET) = 239.70
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.636
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.796
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.24 0.40 0.100 32 7.64
PUBLIC PARK A 0.14 0.40 0.850 32 12.13
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.376
SUBAREA RUNOFF(CFS) = 1.25
TOTAL AREA(ACRES) = 0.38 PEAK FLOW RATE(CFS) = 1.25
****************************************************************************
FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.70
DOWNSTREAM NODE ELEVATION(FEET) = 239.20
CHANNEL LENGTH THRU SUBAREA(FEET) = 235.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 1.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.078
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.24 0.40 0.100 32
PUBLIC PARK A 0.54 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.619
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.23
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.14
AVERAGE FLOW DEPTH(FEET) = 0.27 FLOOD WIDTH(FEET) = 18.91
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 3.42 Tc(MIN.) = 11.06
SUBAREA AREA(ACRES) = 0.78 SUBAREA RUNOFF(CFS) = 1.99
EFFECTIVE AREA(ACRES) = 1.16 AREA-AVERAGED Fm(INCH/HR) = 0.22
Page 4
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PCEX25
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.54
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 2.99
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.30 FLOOD WIDTH(FEET) = 21.51
FLOW VELOCITY(FEET/SEC.) = 1.21 DEPTH*VELOCITY(FT*FT/SEC) = 0.36
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 435.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.20 DOWNSTREAM ELEVATION(FEET) = 238.20
STREET LENGTH(FEET) = 205.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.60
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.40
HALFSTREET FLOOD WIDTH(FEET) = 13.50
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.86
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.74
STREET FLOW TRAVEL TIME(MIN.) = 1.84 Tc(MIN.) = 12.90
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.821
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.49 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.49 SUBAREA RUNOFF(CFS) = 1.23
EFFECTIVE AREA(ACRES) = 1.65 AREA-AVERAGED Fm(INCH/HR) = 0.16
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.41
TOTAL AREA(ACRES) = 1.7 PEAK FLOW RATE(CFS) = 3.95
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.41 HALFSTREET FLOOD WIDTH(FEET) = 13.97
FLOW VELOCITY(FEET/SEC.) = 1.91 DEPTH*VELOCITY(FT*FT/SEC.) = 0.77
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 23.00 = 640.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 10
Page 5
Page 53
PCEX25
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 30.00 TO NODE 31.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00
ELEVATION DATA: UPSTREAM(FEET) = 240.90 DOWNSTREAM(FEET) = 239.60
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.660
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.535
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.10 0.40 0.100 32 8.66
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 3.46
TOTAL AREA(ACRES) = 1.10 PEAK FLOW RATE(CFS) = 3.46
****************************************************************************
FLOW PROCESS FROM NODE 31.00 TO NODE 23.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.60 DOWNSTREAM ELEVATION(FEET) = 238.20
STREET LENGTH(FEET) = 465.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.79
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.46
HALFSTREET FLOOD WIDTH(FEET) = 16.67
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.65
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.76
STREET FLOW TRAVEL TIME(MIN.) = 4.69 Tc(MIN.) = 13.35
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.767
SUBAREA LOSS RATE DATA(AMC II):
Page 6
Page 54
PCEX25
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.08 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.08 SUBAREA RUNOFF(CFS) = 2.65
EFFECTIVE AREA(ACRES) = 2.18 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.2 PEAK FLOW RATE(CFS) = 5.35
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.47 HALFSTREET FLOOD WIDTH(FEET) = 17.37
FLOW VELOCITY(FEET/SEC.) = 1.71 DEPTH*VELOCITY(FT*FT/SEC.) = 0.81
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 5.35 13.35 2.767 0.40( 0.04) 0.10 2.2 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.
** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 3.95 12.90 2.821 0.40( 0.16) 0.41 1.7 20.00
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 23.00 = 640.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 9.22 12.90 2.821 0.40( 0.09) 0.24 3.8 20.00
2 9.22 13.35 2.767 0.40( 0.09) 0.23 3.8 30.00
TOTAL AREA(ACRES) = 3.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 9.22 Tc(MIN.) = 12.901
EFFECTIVE AREA(ACRES) = 3.76 AREA-AVERAGED Fm(INCH/HR) = 0.09
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.23
TOTAL AREA(ACRES) = 3.8
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================
Page 7
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PCEX25
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 13.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 238.20
DOWNSTREAM NODE ELEVATION(FEET) = 238.00
CHANNEL LENGTH THRU SUBAREA(FEET) = 75.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.75
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.732
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.08 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 9.32
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.67
AVERAGE FLOW DEPTH(FEET) = 0.41 FLOOD WIDTH(FEET) = 32.94
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.75 Tc(MIN.) = 13.65
SUBAREA AREA(ACRES) = 0.08 SUBAREA RUNOFF(CFS) = 0.19
EFFECTIVE AREA(ACRES) = 3.84 AREA-AVERAGED Fm(INCH/HR) = 0.09
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.23
TOTAL AREA(ACRES) = 3.9 PEAK FLOW RATE(CFS) = 9.22
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.41 FLOOD WIDTH(FEET) = 32.81
FLOW VELOCITY(FEET/SEC.) = 1.66 DEPTH*VELOCITY(FT*FT/SEC) = 0.68
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 9.22 13.65 2.732 0.40( 0.09) 0.23 3.8 20.00
2 9.22 14.10 2.683 0.40( 0.09) 0.23 3.9 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 5.84 12.47 2.875 0.40( 0.13) 0.34 2.4 10.00
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 13.00 = 825.00 FEET.
Page 8
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PCEX25
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 14.73 12.47 2.875 0.40( 0.11) 0.28 5.9 10.00
2 14.76 13.65 2.732 0.40( 0.11) 0.27 6.2 20.00
3 14.65 14.10 2.683 0.40( 0.11) 0.27 6.3 30.00
TOTAL AREA(ACRES) = 6.3
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 14.76 Tc(MIN.) = 13.651
EFFECTIVE AREA(ACRES) = 6.21 AREA-AVERAGED Fm(INCH/HR) = 0.11
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.28
TOTAL AREA(ACRES) = 6.3
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 238.00 DOWNSTREAM ELEVATION(FEET) = 237.00
STREET LENGTH(FEET) = 320.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 15.90
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.65
HALFSTREET FLOOD WIDTH(FEET) = 33.40
AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.14
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 1.38
STREET FLOW TRAVEL TIME(MIN.) = 2.50 Tc(MIN.) = 16.15
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.484
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.04 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
Page 9
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PCEX25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.04 SUBAREA RUNOFF(CFS) = 2.29
EFFECTIVE AREA(ACRES) = 7.25 AREA-AVERAGED Fm(INCH/HR) = 0.10
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.25
TOTAL AREA(ACRES) = 7.3 PEAK FLOW RATE(CFS) = 15.56
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.64 HALFSTREET FLOOD WIDTH(FEET) = 32.93
FLOW VELOCITY(FEET/SEC.) = 2.13 DEPTH*VELOCITY(FT*FT/SEC.) = 1.37
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 14.00 = 1150.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 40.00 TO NODE 41.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00
ELEVATION DATA: UPSTREAM(FEET) = 241.70 DOWNSTREAM(FEET) = 240.70
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.127
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.431
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.68 0.40 0.100 32 9.13
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.08
TOTAL AREA(ACRES) = 0.68 PEAK FLOW RATE(CFS) = 2.08
****************************************************************************
FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.70 DOWNSTREAM ELEVATION(FEET) = 239.50
STREET LENGTH(FEET) = 260.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
Page 10
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PCEX25
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.41
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.36
HALFSTREET FLOOD WIDTH(FEET) = 11.55
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.66
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.59
STREET FLOW TRAVEL TIME(MIN.) = 2.61 Tc(MIN.) = 11.74
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.975
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.25 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.25 SUBAREA RUNOFF(CFS) = 0.66
EFFECTIVE AREA(ACRES) = 0.93 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 2.46
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.36 HALFSTREET FLOOD WIDTH(FEET) = 11.65
FLOW VELOCITY(FEET/SEC.) = 1.66 DEPTH*VELOCITY(FT*FT/SEC.) = 0.60
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 43.00 TO NODE 44.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.20
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.358
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.383
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.73 0.40 0.100 32 9.36
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 5.21
Page 11
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PCEX25
TOTAL AREA(ACRES) = 1.73 PEAK FLOW RATE(CFS) = 5.21
****************************************************************************
FLOW PROCESS FROM NODE 44.00 TO NODE 42.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 240.20
DOWNSTREAM NODE ELEVATION(FEET) = 239.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 155.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.75
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.135
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.17 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.84
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.92
AVERAGE FLOW DEPTH(FEET) = 0.34 FLOOD WIDTH(FEET) = 26.06
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.35 Tc(MIN.) = 10.70
SUBAREA AREA(ACRES) = 1.17 SUBAREA RUNOFF(CFS) = 3.26
EFFECTIVE AREA(ACRES) = 2.90 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.9 PEAK FLOW RATE(CFS) = 8.08
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 27.94
FLOW VELOCITY(FEET/SEC.) = 1.99 DEPTH*VELOCITY(FT*FT/SEC) = 0.71
LONGEST FLOWPATH FROM NODE 43.00 TO NODE 42.00 = 485.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 8.08 10.70 3.135 0.40( 0.04) 0.10 2.9 43.00
LONGEST FLOWPATH FROM NODE 43.00 TO NODE 42.00 = 485.00 FEET.
** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 2.46 11.74 2.975 0.40( 0.04) 0.10 0.9 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.
Page 12
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PCEX25
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 10.44 10.70 3.135 0.40( 0.04) 0.10 3.7 43.00
2 10.12 11.74 2.975 0.40( 0.04) 0.10 3.8 40.00
TOTAL AREA(ACRES) = 3.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 10.44 Tc(MIN.) = 10.704
EFFECTIVE AREA(ACRES) = 3.75 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 3.8
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 45.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.50
DOWNSTREAM NODE ELEVATION(FEET) = 239.20
CHANNEL LENGTH THRU SUBAREA(FEET) = 50.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.078
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.28 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 10.82
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.36
AVERAGE FLOW DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 29.74
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.35 Tc(MIN.) = 11.06
SUBAREA AREA(ACRES) = 0.28 SUBAREA RUNOFF(CFS) = 0.77
EFFECTIVE AREA(ACRES) = 4.03 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.1 PEAK FLOW RATE(CFS) = 11.01
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 29.89
FLOW VELOCITY(FEET/SEC.) = 2.38 DEPTH*VELOCITY(FT*FT/SEC) = 0.90
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 45.00 = 600.00 FEET.
Page 13
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PCEX25
****************************************************************************
FLOW PROCESS FROM NODE 45.00 TO NODE 46.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.20
DOWNSTREAM NODE ELEVATION(FEET) = 238.00
CHANNEL LENGTH THRU SUBAREA(FEET) = 330.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.714
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.70 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 11.85
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.99
AVERAGE FLOW DEPTH(FEET) = 0.42 FLOOD WIDTH(FEET) = 34.00
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 2.76 Tc(MIN.) = 13.82
SUBAREA AREA(ACRES) = 0.70 SUBAREA RUNOFF(CFS) = 1.68
EFFECTIVE AREA(ACRES) = 4.73 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.8 PEAK FLOW RATE(CFS) = 11.38
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.42 FLOOD WIDTH(FEET) = 33.54
FLOW VELOCITY(FEET/SEC.) = 1.96 DEPTH*VELOCITY(FT*FT/SEC) = 0.82
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 46.00 = 930.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 46.00 TO NODE 47.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 238.00
DOWNSTREAM NODE ELEVATION(FEET) = 237.60
CHANNEL LENGTH THRU SUBAREA(FEET) = 170.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.544
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.10 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 12.62
Page 14
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PCEX25
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.70
AVERAGE FLOW DEPTH(FEET) = 0.46 FLOOD WIDTH(FEET) = 38.12
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.67 Tc(MIN.) = 15.48
SUBAREA AREA(ACRES) = 1.10 SUBAREA RUNOFF(CFS) = 2.48
EFFECTIVE AREA(ACRES) = 5.83 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 5.9 PEAK FLOW RATE(CFS) = 13.13
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.47 FLOOD WIDTH(FEET) = 38.72
FLOW VELOCITY(FEET/SEC.) = 1.71 DEPTH*VELOCITY(FT*FT/SEC) = 0.80
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 47.00 = 1100.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 47.00 TO NODE 47.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 15.48
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.544
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.33 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.33 SUBAREA RUNOFF(CFS) = 0.74
EFFECTIVE AREA(ACRES) = 6.16 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 6.2 PEAK FLOW RATE(CFS) = 13.88
****************************************************************************
FLOW PROCESS FROM NODE 47.00 TO NODE 14.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 237.60
DOWNSTREAM NODE ELEVATION(FEET) = 237.00
CHANNEL LENGTH THRU SUBAREA(FEET) = 220.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 1.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.378
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.50 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 14.40
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.86
AVERAGE FLOW DEPTH(FEET) = 0.47 FLOOD WIDTH(FEET) = 38.90
Page 15
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"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.97 Tc(MIN.) = 17.45
SUBAREA AREA(ACRES) = 0.50 SUBAREA RUNOFF(CFS) = 1.05
EFFECTIVE AREA(ACRES) = 6.66 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 6.7 PEAK FLOW RATE(CFS) = 14.01
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.47 FLOOD WIDTH(FEET) = 38.55
FLOW VELOCITY(FEET/SEC.) = 1.84 DEPTH*VELOCITY(FT*FT/SEC) = 0.86
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 14.01 17.45 2.378 0.40( 0.04) 0.10 6.7 43.00
2 13.69 18.55 2.297 0.40( 0.04) 0.10 6.7 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 15.52 14.97 2.593 0.40( 0.10) 0.25 6.9 10.00
2 15.56 16.15 2.484 0.40( 0.10) 0.25 7.2 20.00
3 15.47 16.59 2.447 0.40( 0.10) 0.25 7.3 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 14.00 = 1150.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 28.65 14.97 2.593 0.40( 0.07) 0.18 12.6 10.00
2 29.11 16.15 2.484 0.40( 0.07) 0.18 13.4 20.00
3 29.18 16.59 2.447 0.40( 0.07) 0.18 13.6 30.00
4 29.02 17.45 2.378 0.40( 0.07) 0.18 14.0 43.00
5 28.17 18.55 2.297 0.40( 0.07) 0.18 14.1 40.00
TOTAL AREA(ACRES) = 14.1
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 29.18 Tc(MIN.) = 16.586
EFFECTIVE AREA(ACRES) = 13.65 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18
TOTAL AREA(ACRES) = 14.1
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 1 <<<<<
Page 16
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PCEX25
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 14.00 TO NODE 15.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.00 DOWNSTREAM(FEET) = 235.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 145.00 CHANNEL SLOPE = 0.0131
CHANNEL FLOW THRU SUBAREA(CFS) = 29.18
FLOW VELOCITY(FEET/SEC) = 3.80 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 0.64 Tc(MIN.) = 17.22
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 15.00 = 1465.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 15.00 TO NODE 15.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 17.22
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.395
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.16 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.30
EFFECTIVE AREA(ACRES) = 13.81 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 14.2 PEAK FLOW RATE(CFS) = 29.18
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 15.00 TO NODE 15.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 17.22
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.395
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.25 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.25 SUBAREA RUNOFF(CFS) = 2.65
EFFECTIVE AREA(ACRES) = 15.06 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18
TOTAL AREA(ACRES) = 15.5 PEAK FLOW RATE(CFS) = 31.49
****************************************************************************
Page 17
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FLOW PROCESS FROM NODE 15.00 TO NODE 16.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.10 DOWNSTREAM(FEET) = 234.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 205.00 CHANNEL SLOPE = 0.0049
CHANNEL FLOW THRU SUBAREA(CFS) = 31.49
FLOW VELOCITY(FEET/SEC) = 2.37 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 1.44 Tc(MIN.) = 18.66
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 18.66
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.289
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.30 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.53
EFFECTIVE AREA(ACRES) = 15.36 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 15.8 PEAK FLOW RATE(CFS) = 31.49
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 245.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.50
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.248
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.634
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.84 0.40 0.100 32 8.25
Page 18
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PCEX25
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.72
TOTAL AREA(ACRES) = 0.84 PEAK FLOW RATE(CFS) = 2.72
****************************************************************************
FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 238.00 DOWNSTREAM(FEET) = 237.50
FLOW LENGTH(FEET) = 125.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 3.46
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 2.72
PIPE TRAVEL TIME(MIN.) = 0.60 Tc(MIN.) = 8.85
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 52.00 = 370.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 52.00 TO NODE 52.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 8.85
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.491
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.28 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.28 SUBAREA RUNOFF(CFS) = 3.98
EFFECTIVE AREA(ACRES) = 2.12 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.1 PEAK FLOW RATE(CFS) = 6.59
****************************************************************************
FLOW PROCESS FROM NODE 52.00 TO NODE 53.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.50
FLOW LENGTH(FEET) = 330.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 8.38
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 6.59
PIPE TRAVEL TIME(MIN.) = 0.66 Tc(MIN.) = 9.51
Page 19
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PCEX25
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 53.00 = 700.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 53.00 TO NODE 53.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.51
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.353
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.63 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.63 SUBAREA RUNOFF(CFS) = 4.86
EFFECTIVE AREA(ACRES) = 3.75 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 3.8 PEAK FLOW RATE(CFS) = 11.18
****************************************************************************
FLOW PROCESS FROM NODE 53.00 TO NODE 54.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.50 DOWNSTREAM(FEET) = 236.30
FLOW LENGTH(FEET) = 30.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 14.24
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 11.18
PIPE TRAVEL TIME(MIN.) = 0.04 Tc(MIN.) = 9.54
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 54.00 = 730.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 54.00 TO NODE 54.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.54
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.346
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.49 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.49 SUBAREA RUNOFF(CFS) = 1.46
EFFECTIVE AREA(ACRES) = 4.24 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.2 PEAK FLOW RATE(CFS) = 12.62
Page 20
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PCEX25
****************************************************************************
FLOW PROCESS FROM NODE 54.00 TO NODE 55.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.30 DOWNSTREAM(FEET) = 235.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00 CHANNEL SLOPE = 0.0050
CHANNEL FLOW THRU SUBAREA(CFS) = 12.62
FLOW VELOCITY(FEET/SEC) = 1.88 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 1.42 Tc(MIN.) = 10.96
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 55.00 = 890.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 10.96
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.093
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.31 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.31 SUBAREA RUNOFF(CFS) = 0.85
EFFECTIVE AREA(ACRES) = 4.55 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.5 PEAK FLOW RATE(CFS) = 12.62
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 10.96
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.093
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.19 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.19 SUBAREA RUNOFF(CFS) = 0.47
EFFECTIVE AREA(ACRES) = 4.74 AREA-AVERAGED Fm(INCH/HR) = 0.05
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13
TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 12.97
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 16.00 IS CODE = 52
Page 21
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PCEX25
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.50 DOWNSTREAM(FEET) = 234.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 255.00 CHANNEL SLOPE = 0.0055
CHANNEL FLOW THRU SUBAREA(CFS) = 12.97
FLOW VELOCITY(FEET/SEC) = 1.98 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 2.15 Tc(MIN.) = 13.11
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 16.00 = 1145.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 13.11
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.795
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.29 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.29 SUBAREA RUNOFF(CFS) = 0.64
EFFECTIVE AREA(ACRES) = 5.03 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.17
TOTAL AREA(ACRES) = 5.0 PEAK FLOW RATE(CFS) = 12.97
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 12.97 13.11 2.795 0.40( 0.07) 0.17 5.0 50.00
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 16.00 = 1145.00 FEET.
** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 31.08 17.05 2.409 0.40( 0.08) 0.20 14.3 10.00
2 31.45 18.22 2.320 0.40( 0.08) 0.19 15.1 20.00
3 31.49 18.66 2.289 0.40( 0.08) 0.19 15.4 30.00
4 31.28 19.53 2.231 0.40( 0.08) 0.19 15.7 43.00
5 30.38 20.65 2.162 0.40( 0.08) 0.19 15.8 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.
** PEAK FLOW RATE TABLE **
Page 22
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PCEX25
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 40.83 13.11 2.795 0.40( 0.08) 0.19 16.1 50.00
2 42.21 17.05 2.409 0.40( 0.08) 0.19 19.4 10.00
3 42.16 18.22 2.320 0.40( 0.08) 0.19 20.1 20.00
4 42.06 18.66 2.289 0.40( 0.07) 0.19 20.4 30.00
5 41.57 19.53 2.231 0.40( 0.07) 0.19 20.7 43.00
6 40.34 20.65 2.162 0.40( 0.07) 0.19 20.8 40.00
TOTAL AREA(ACRES) = 20.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 42.21 Tc(MIN.) = 17.053
EFFECTIVE AREA(ACRES) = 19.37 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 20.8
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 17.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 234.10 DOWNSTREAM(FEET) = 233.20
FLOW LENGTH(FEET) = 55.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 15.8 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 9.64
GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 2
PIPE-FLOW(CFS) = 42.21
PIPE TRAVEL TIME(MIN.) = 0.10 Tc(MIN.) = 17.15
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 17.00 = 1725.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 17.00 TO NODE 17.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 17.15
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.401
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.53 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.53 SUBAREA RUNOFF(CFS) = 0.98
EFFECTIVE AREA(ACRES) = 19.90 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21
TOTAL AREA(ACRES) = 21.3 PEAK FLOW RATE(CFS) = 42.21
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 80.00 TO NODE 81.00 IS CODE = 21
Page 23
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PCEX25
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00
ELEVATION DATA: UPSTREAM(FEET) = 243.30 DOWNSTREAM(FEET) = 240.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.672
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.786
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
PUBLIC PARK A 0.54 0.40 0.850 32 12.19
COMMERCIAL A 0.12 0.40 0.100 32 7.67
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.714
SUBAREA RUNOFF(CFS) = 2.08
TOTAL AREA(ACRES) = 0.66 PEAK FLOW RATE(CFS) = 2.08
****************************************************************************
FLOW PROCESS FROM NODE 81.00 TO NODE 82.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.10 DOWNSTREAM ELEVATION(FEET) = 238.80
STREET LENGTH(FEET) = 150.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 40.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 28.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.41
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.33
HALFSTREET FLOOD WIDTH(FEET) = 10.15
AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.09
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.69
STREET FLOW TRAVEL TIME(MIN.) = 1.19 Tc(MIN.) = 8.87
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.488
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.11 0.40 0.850 32
COMMERCIAL A 0.11 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
Page 24
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PCEX25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.475
SUBAREA AREA(ACRES) = 0.22 SUBAREA RUNOFF(CFS) = 0.65
EFFECTIVE AREA(ACRES) = 0.88 AREA-AVERAGED Fm(INCH/HR) = 0.26
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.65
TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 2.56
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.33 HALFSTREET FLOOD WIDTH(FEET) = 10.40
FLOW VELOCITY(FEET/SEC.) = 2.13 DEPTH*VELOCITY(FT*FT/SEC.) = 0.71
LONGEST FLOWPATH FROM NODE 80.00 TO NODE 82.00 = 470.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 82.00 TO NODE 83.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 238.80 DOWNSTREAM ELEVATION(FEET) = 238.50
STREET LENGTH(FEET) = 90.00 CURB HEIGHT(INCHES) = 8.0
STREET HALFWIDTH(FEET) = 84.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 30.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.77
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.41
HALFSTREET FLOOD WIDTH(FEET) = 12.74
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.53
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.63
STREET FLOW TRAVEL TIME(MIN.) = 0.98 Tc(MIN.) = 9.85
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.287
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.16 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.42
EFFECTIVE AREA(ACRES) = 1.04 AREA-AVERAGED Fm(INCH/HR) = 0.27
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.68
TOTAL AREA(ACRES) = 1.0 PEAK FLOW RATE(CFS) = 2.82
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.42 HALFSTREET FLOOD WIDTH(FEET) = 12.84
FLOW VELOCITY(FEET/SEC.) = 1.53 DEPTH*VELOCITY(FT*FT/SEC.) = 0.64
LONGEST FLOWPATH FROM NODE 80.00 TO NODE 83.00 = 560.00 FEET.
Page 25
Page 73
PCEX25
****************************************************************************
FLOW PROCESS FROM NODE 90.00 TO NODE 91.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 280.00
ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.937
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.472
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.64 0.40 0.100 32 8.94
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.98
TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 1.98
****************************************************************************
FLOW PROCESS FROM NODE 91.00 TO NODE 92.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.90 DOWNSTREAM ELEVATION(FEET) = 239.50
STREET LENGTH(FEET) = 270.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.67
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.36
HALFSTREET FLOOD WIDTH(FEET) = 11.79
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.77
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.64
STREET FLOW TRAVEL TIME(MIN.) = 2.54 Tc(MIN.) = 11.47
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.014
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.52 0.40 0.100 32
Page 26
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PCEX25
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.52 SUBAREA RUNOFF(CFS) = 1.39
EFFECTIVE AREA(ACRES) = 1.16 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.11
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.38 HALFSTREET FLOOD WIDTH(FEET) = 12.57
FLOW VELOCITY(FEET/SEC.) = 1.83 DEPTH*VELOCITY(FT*FT/SEC.) = 0.69
LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 92.00 TO NODE 92.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 100.00 TO NODE 101.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 295.00
ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.221
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.411
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.79 0.40 0.100 32 9.22
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.40
TOTAL AREA(ACRES) = 0.79 PEAK FLOW RATE(CFS) = 2.40
****************************************************************************
FLOW PROCESS FROM NODE 101.00 TO NODE 92.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.22
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.411
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.44 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.44 SUBAREA RUNOFF(CFS) = 1.34
Page 27
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PCEX25
EFFECTIVE AREA(ACRES) = 1.23 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.73
****************************************************************************
FLOW PROCESS FROM NODE 92.00 TO NODE 92.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 3.73 9.22 3.411 0.40( 0.04) 0.10 1.2 100.00
LONGEST FLOWPATH FROM NODE 100.00 TO NODE 92.00 = 295.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 3.11 11.47 3.014 0.40( 0.04) 0.10 1.2 90.00
LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 6.56 9.22 3.411 0.40( 0.04) 0.10 2.2 100.00
2 6.40 11.47 3.014 0.40( 0.04) 0.10 2.4 90.00
TOTAL AREA(ACRES) = 2.4
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 6.56 Tc(MIN.) = 9.221
EFFECTIVE AREA(ACRES) = 2.16 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.4
LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 92.00 TO NODE 93.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.50 DOWNSTREAM ELEVATION(FEET) = 239.10
STREET LENGTH(FEET) = 100.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Page 28
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PCEX25
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.71
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.49
HALFSTREET FLOOD WIDTH(FEET) = 17.94
AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.01
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.97
STREET FLOW TRAVEL TIME(MIN.) = 0.83 Tc(MIN.) = 10.05
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.249
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.10 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.10 SUBAREA RUNOFF(CFS) = 0.29
EFFECTIVE AREA(ACRES) = 2.26 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.5 PEAK FLOW RATE(CFS) = 6.56
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.48 HALFSTREET FLOOD WIDTH(FEET) = 17.84
FLOW VELOCITY(FEET/SEC.) = 1.99 DEPTH*VELOCITY(FT*FT/SEC.) = 0.96
LONGEST FLOWPATH FROM NODE 90.00 TO NODE 93.00 = 650.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 94.00 TO NODE 95.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 190.00
ELEVATION DATA: UPSTREAM(FEET) = 242.10 DOWNSTREAM(FEET) = 240.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.165
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.285
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.39 0.40 0.100 32 6.16
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.49
TOTAL AREA(ACRES) = 0.39 PEAK FLOW RATE(CFS) = 1.49
****************************************************************************
FLOW PROCESS FROM NODE 96.00 TO NODE 97.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
Page 29
Page 77
PCEX25
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00
ELEVATION DATA: UPSTREAM(FEET) = 241.30 DOWNSTREAM(FEET) = 240.20
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.165
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.935
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.52 0.40 0.100 32 7.16
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.82
TOTAL AREA(ACRES) = 0.52 PEAK FLOW RATE(CFS) = 1.82
****************************************************************************
FLOW PROCESS FROM NODE 98.00 TO NODE 99.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 160.00
ELEVATION DATA: UPSTREAM(FEET) = 241.40 DOWNSTREAM(FEET) = 240.70
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.860
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.033
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.06 0.40 0.100 32 6.86
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 3.81
TOTAL AREA(ACRES) = 1.06 PEAK FLOW RATE(CFS) = 3.81
****************************************************************************
FLOW PROCESS FROM NODE 102.00 TO NODE 103.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 150.00
ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 241.30
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.029
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.339
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.27 0.40 0.100 32 6.03
Page 30
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PCEX25
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.04
TOTAL AREA(ACRES) = 0.27 PEAK FLOW RATE(CFS) = 1.04
============================================================================
END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 0.3 TC(MIN.) = 6.03
EFFECTIVE AREA(ACRES) = 0.27 AREA-AVERAGED Fm(INCH/HR)= 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.100
PEAK FLOW RATE(CFS) = 1.04
============================================================================
============================================================================
END OF RATIONAL METHOD ANALYSIS
�
Page 31
Page 79
HYDROLOGY REPORT August 2017
Pacific Center City of Anaheim, CA
APPENDIX 2.2
100-Year Hydrology Study, Existing Condition
Page 80
PCEX100
____________________________________________________________________________
****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE
(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)
(c) Copyright 1983-2014 Advanced Engineering Software (aes)
Ver. 21.0 Release Date: 06/01/2014 License ID 1355
Analysis prepared by:
Fuscoe Engineering
16795 Von Karman Ave
Suite 100
Irvine CA, 92606
************************** DESCRIPTION OF STUDY **************************
* PACIFIC CENTER - ANAHEIM *
* EXISTING HYDROLOGY *
* 100 YEAR EVENT *
**************************************************************************
FILE NAME: PCEX100.DAT
TIME/DATE OF STUDY: 13:42 08/01/2017
============================================================================
USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
============================================================================
--*TIME-OF-CONCENTRATION MODEL*--
USER SPECIFIED STORM EVENT(YEAR) = 100.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90
*DATA BANK RAINFALL USED*
*ANTECEDENT MOISTURE CONDITION (AMC) III ASSUMED FOR RATIONAL METHOD*
*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL*
HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR
NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)
=== ===== ========= ================= ====== ===== ====== ===== =======
1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0312 0.167 0.0150
GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)
*PIPE MAY BE SIZED TO HAVE A FLOW CAPACITY LESS THAN
UPSTREAM TRIBUTARY PIPE.*
*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED
****************************************************************************
FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
Page 1
Page 81
PCEX100
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 355.00
ELEVATION DATA: UPSTREAM(FEET) = 243.40 DOWNSTREAM(FEET) = 239.40
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.809
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.792
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.87 0.40 0.100 52 7.81
PUBLIC PARK A 0.22 0.40 0.850 52 12.41
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.251
SUBAREA RUNOFF(CFS) = 4.60
TOTAL AREA(ACRES) = 1.09 PEAK FLOW RATE(CFS) = 4.60
****************************************************************************
FLOW PROCESS FROM NODE 11.00 TO NODE 12.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.40 DOWNSTREAM ELEVATION(FEET) = 238.50
STREET LENGTH(FEET) = 280.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 40.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.10
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.49
HALFSTREET FLOOD WIDTH(FEET) = 18.08
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.80
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.88
STREET FLOW TRAVEL TIME(MIN.) = 2.59 Tc(MIN.) = 10.40
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.067
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.54 0.40 0.100 52
PUBLIC PARK A 0.31 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.374
SUBAREA AREA(ACRES) = 0.85 SUBAREA RUNOFF(CFS) = 3.00
EFFECTIVE AREA(ACRES) = 1.94 AREA-AVERAGED Fm(INCH/HR) = 0.12
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AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.30
TOTAL AREA(ACRES) = 1.9 PEAK FLOW RATE(CFS) = 6.89
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.51 HALFSTREET FLOOD WIDTH(FEET) = 19.22
FLOW VELOCITY(FEET/SEC.) = 1.86 DEPTH*VELOCITY(FT*FT/SEC.) = 0.94
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 12.00 = 635.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 238.50 DOWNSTREAM ELEVATION(FEET) = 238.00
STREET LENGTH(FEET) = 190.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 7.57
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.53
HALFSTREET FLOOD WIDTH(FEET) = 22.15
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.75
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.94
STREET FLOW TRAVEL TIME(MIN.) = 1.81 Tc(MIN.) = 12.21
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.710
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.21 0.40 0.100 52
PUBLIC PARK A 0.22 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.484
SUBAREA AREA(ACRES) = 0.43 SUBAREA RUNOFF(CFS) = 1.36
EFFECTIVE AREA(ACRES) = 2.37 AREA-AVERAGED Fm(INCH/HR) = 0.13
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.34
TOTAL AREA(ACRES) = 2.4 PEAK FLOW RATE(CFS) = 7.63
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.54 HALFSTREET FLOOD WIDTH(FEET) = 22.27
FLOW VELOCITY(FEET/SEC.) = 1.76 DEPTH*VELOCITY(FT*FT/SEC.) = 0.94
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 13.00 = 825.00 FEET.
****************************************************************************
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FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 20.00 TO NODE 21.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00
ELEVATION DATA: UPSTREAM(FEET) = 240.50 DOWNSTREAM(FEET) = 239.70
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.636
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.854
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.24 0.40 0.100 52 7.64
PUBLIC PARK A 0.14 0.40 0.850 52 12.13
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.376
SUBAREA RUNOFF(CFS) = 1.61
TOTAL AREA(ACRES) = 0.38 PEAK FLOW RATE(CFS) = 1.61
****************************************************************************
FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.70
DOWNSTREAM NODE ELEVATION(FEET) = 239.20
CHANNEL LENGTH THRU SUBAREA(FEET) = 235.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 1.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.963
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.24 0.40 0.100 52
PUBLIC PARK A 0.54 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.619
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.90
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.21
AVERAGE FLOW DEPTH(FEET) = 0.29 FLOOD WIDTH(FEET) = 21.17
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 3.25 Tc(MIN.) = 10.88
SUBAREA AREA(ACRES) = 0.78 SUBAREA RUNOFF(CFS) = 2.61
EFFECTIVE AREA(ACRES) = 1.16 AREA-AVERAGED Fm(INCH/HR) = 0.22
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AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.54
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.91
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.32 FLOOD WIDTH(FEET) = 24.12
FLOW VELOCITY(FEET/SEC.) = 1.27 DEPTH*VELOCITY(FT*FT/SEC) = 0.41
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 435.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.20 DOWNSTREAM ELEVATION(FEET) = 238.20
STREET LENGTH(FEET) = 205.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.71
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.43
HALFSTREET FLOOD WIDTH(FEET) = 15.03
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.98
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.85
STREET FLOW TRAVEL TIME(MIN.) = 1.73 Tc(MIN.) = 12.61
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.642
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.49 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.49 SUBAREA RUNOFF(CFS) = 1.59
EFFECTIVE AREA(ACRES) = 1.65 AREA-AVERAGED Fm(INCH/HR) = 0.16
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.41
TOTAL AREA(ACRES) = 1.7 PEAK FLOW RATE(CFS) = 5.17
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.44 HALFSTREET FLOOD WIDTH(FEET) = 15.62
FLOW VELOCITY(FEET/SEC.) = 2.02 DEPTH*VELOCITY(FT*FT/SEC.) = 0.89
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 23.00 = 640.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 10
Page 5
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----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 30.00 TO NODE 31.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00
ELEVATION DATA: UPSTREAM(FEET) = 240.90 DOWNSTREAM(FEET) = 239.60
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.660
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.517
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.10 0.40 0.100 52 8.66
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 4.43
TOTAL AREA(ACRES) = 1.10 PEAK FLOW RATE(CFS) = 4.43
****************************************************************************
FLOW PROCESS FROM NODE 31.00 TO NODE 23.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.60 DOWNSTREAM ELEVATION(FEET) = 238.20
STREET LENGTH(FEET) = 465.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.15
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.49
HALFSTREET FLOOD WIDTH(FEET) = 18.37
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.76
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.87
STREET FLOW TRAVEL TIME(MIN.) = 4.40 Tc(MIN.) = 13.06
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.569
SUBAREA LOSS RATE DATA(AMC III):
Page 6
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DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.08 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.08 SUBAREA RUNOFF(CFS) = 3.43
EFFECTIVE AREA(ACRES) = 2.18 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.2 PEAK FLOW RATE(CFS) = 6.92
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.51 HALFSTREET FLOOD WIDTH(FEET) = 19.81
FLOW VELOCITY(FEET/SEC.) = 1.81 DEPTH*VELOCITY(FT*FT/SEC.) = 0.93
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 6.92 13.06 3.569 0.40( 0.04) 0.10 2.2 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.
** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 5.17 12.61 3.642 0.40( 0.16) 0.41 1.7 20.00
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 23.00 = 640.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 11.99 12.61 3.642 0.40( 0.09) 0.24 3.8 20.00
2 11.98 13.06 3.569 0.40( 0.09) 0.23 3.8 30.00
TOTAL AREA(ACRES) = 3.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 11.99 Tc(MIN.) = 12.607
EFFECTIVE AREA(ACRES) = 3.75 AREA-AVERAGED Fm(INCH/HR) = 0.09
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.23
TOTAL AREA(ACRES) = 3.8
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================
Page 7
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****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 13.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 238.20
DOWNSTREAM NODE ELEVATION(FEET) = 238.00
CHANNEL LENGTH THRU SUBAREA(FEET) = 75.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.75
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.530
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.08 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 12.11
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.77
AVERAGE FLOW DEPTH(FEET) = 0.45 FLOOD WIDTH(FEET) = 36.56
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.71 Tc(MIN.) = 13.31
SUBAREA AREA(ACRES) = 0.08 SUBAREA RUNOFF(CFS) = 0.25
EFFECTIVE AREA(ACRES) = 3.83 AREA-AVERAGED Fm(INCH/HR) = 0.09
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.23
TOTAL AREA(ACRES) = 3.9 PEAK FLOW RATE(CFS) = 11.99
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.44 FLOOD WIDTH(FEET) = 36.44
FLOW VELOCITY(FEET/SEC.) = 1.76 DEPTH*VELOCITY(FT*FT/SEC) = 0.78
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 11.99 13.31 3.530 0.40( 0.09) 0.23 3.8 20.00
2 11.98 13.77 3.463 0.40( 0.09) 0.23 3.9 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 7.63 12.21 3.710 0.40( 0.13) 0.34 2.4 10.00
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 13.00 = 825.00 FEET.
Page 8
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** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 19.19 12.21 3.710 0.40( 0.11) 0.28 5.9 10.00
2 19.23 13.31 3.530 0.40( 0.11) 0.27 6.2 20.00
3 19.08 13.77 3.463 0.40( 0.11) 0.27 6.3 30.00
TOTAL AREA(ACRES) = 6.3
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 19.23 Tc(MIN.) = 13.314
EFFECTIVE AREA(ACRES) = 6.20 AREA-AVERAGED Fm(INCH/HR) = 0.11
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.28
TOTAL AREA(ACRES) = 6.3
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 238.00 DOWNSTREAM ELEVATION(FEET) = 237.00
STREET LENGTH(FEET) = 320.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 20.71
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.70
HALFSTREET FLOOD WIDTH(FEET) = 38.44
AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.24
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 1.56
STREET FLOW TRAVEL TIME(MIN.) = 2.38 Tc(MIN.) = 15.70
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.212
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.04 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
Page 9
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SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.04 SUBAREA RUNOFF(CFS) = 2.97
EFFECTIVE AREA(ACRES) = 7.24 AREA-AVERAGED Fm(INCH/HR) = 0.10
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.25
TOTAL AREA(ACRES) = 7.3 PEAK FLOW RATE(CFS) = 20.30
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.69 HALFSTREET FLOOD WIDTH(FEET) = 38.09
FLOW VELOCITY(FEET/SEC.) = 2.23 DEPTH*VELOCITY(FT*FT/SEC.) = 1.54
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 14.00 = 1150.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 40.00 TO NODE 41.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00
ELEVATION DATA: UPSTREAM(FEET) = 241.70 DOWNSTREAM(FEET) = 240.70
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.127
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.383
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.68 0.40 0.100 52 9.13
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.66
TOTAL AREA(ACRES) = 0.68 PEAK FLOW RATE(CFS) = 2.66
****************************************************************************
FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.70 DOWNSTREAM ELEVATION(FEET) = 239.50
STREET LENGTH(FEET) = 260.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
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STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.08
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.38
HALFSTREET FLOOD WIDTH(FEET) = 12.81
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.75
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.67
STREET FLOW TRAVEL TIME(MIN.) = 2.47 Tc(MIN.) = 11.60
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.820
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.25 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.25 SUBAREA RUNOFF(CFS) = 0.85
EFFECTIVE AREA(ACRES) = 0.93 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 3.16
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.39 HALFSTREET FLOOD WIDTH(FEET) = 12.97
FLOW VELOCITY(FEET/SEC.) = 1.76 DEPTH*VELOCITY(FT*FT/SEC.) = 0.68
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 43.00 TO NODE 44.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.20
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.358
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.320
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.73 0.40 0.100 52 9.36
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 6.66
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TOTAL AREA(ACRES) = 1.73 PEAK FLOW RATE(CFS) = 6.66
****************************************************************************
FLOW PROCESS FROM NODE 44.00 TO NODE 42.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 240.20
DOWNSTREAM NODE ELEVATION(FEET) = 239.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 155.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.75
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.016
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.17 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 8.76
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.03
AVERAGE FLOW DEPTH(FEET) = 0.37 FLOOD WIDTH(FEET) = 28.81
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.27 Tc(MIN.) = 10.63
SUBAREA AREA(ACRES) = 1.17 SUBAREA RUNOFF(CFS) = 4.19
EFFECTIVE AREA(ACRES) = 2.90 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.9 PEAK FLOW RATE(CFS) = 10.38
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.39 FLOOD WIDTH(FEET) = 30.94
FLOW VELOCITY(FEET/SEC.) = 2.10 DEPTH*VELOCITY(FT*FT/SEC) = 0.82
LONGEST FLOWPATH FROM NODE 43.00 TO NODE 42.00 = 485.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 10.38 10.63 4.016 0.40( 0.04) 0.10 2.9 43.00
LONGEST FLOWPATH FROM NODE 43.00 TO NODE 42.00 = 485.00 FEET.
** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 3.16 11.60 3.820 0.40( 0.04) 0.10 0.9 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.
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** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 13.43 10.63 4.016 0.40( 0.04) 0.10 3.8 43.00
2 13.03 11.60 3.820 0.40( 0.04) 0.10 3.8 40.00
TOTAL AREA(ACRES) = 3.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 13.43 Tc(MIN.) = 10.631
EFFECTIVE AREA(ACRES) = 3.75 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 3.8
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 45.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.50
DOWNSTREAM NODE ELEVATION(FEET) = 239.20
CHANNEL LENGTH THRU SUBAREA(FEET) = 50.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.946
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.28 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 13.92
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.51
AVERAGE FLOW DEPTH(FEET) = 0.41 FLOOD WIDTH(FEET) = 32.78
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.33 Tc(MIN.) = 10.96
SUBAREA AREA(ACRES) = 0.28 SUBAREA RUNOFF(CFS) = 0.98
EFFECTIVE AREA(ACRES) = 4.03 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.1 PEAK FLOW RATE(CFS) = 14.17
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.41 FLOOD WIDTH(FEET) = 33.09
FLOW VELOCITY(FEET/SEC.) = 2.51 DEPTH*VELOCITY(FT*FT/SEC) = 1.03
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 45.00 = 600.00 FEET.
Page 13
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****************************************************************************
FLOW PROCESS FROM NODE 45.00 TO NODE 46.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.20
DOWNSTREAM NODE ELEVATION(FEET) = 238.00
CHANNEL LENGTH THRU SUBAREA(FEET) = 330.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.491
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.70 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 15.26
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.10
AVERAGE FLOW DEPTH(FEET) = 0.46 FLOOD WIDTH(FEET) = 37.66
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 2.61 Tc(MIN.) = 13.58
SUBAREA AREA(ACRES) = 0.70 SUBAREA RUNOFF(CFS) = 2.17
EFFECTIVE AREA(ACRES) = 4.73 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.8 PEAK FLOW RATE(CFS) = 14.70
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.45 FLOOD WIDTH(FEET) = 37.05
FLOW VELOCITY(FEET/SEC.) = 2.09 DEPTH*VELOCITY(FT*FT/SEC) = 0.94
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 46.00 = 930.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 46.00 TO NODE 47.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 238.00
DOWNSTREAM NODE ELEVATION(FEET) = 237.60
CHANNEL LENGTH THRU SUBAREA(FEET) = 170.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.280
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.10 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 16.30
Page 14
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TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.81
AVERAGE FLOW DEPTH(FEET) = 0.50 FLOOD WIDTH(FEET) = 42.00
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.56 Tc(MIN.) = 15.14
SUBAREA AREA(ACRES) = 1.10 SUBAREA RUNOFF(CFS) = 3.21
EFFECTIVE AREA(ACRES) = 5.83 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 5.9 PEAK FLOW RATE(CFS) = 17.00
==>>ERROR:FLOW EXCEEDS CAPACITY OF CHANNEL WITH
NORMAL DEPTH EQUAL TO SPECIFIED MAXIMUM ALLOWABLE DEPTH.
AS AN APPROXIMATION, TRAVEL TIME CALCULATIONS ARE BASED
ON FLOW DEPTH EQUAL TO THE SPECIFIED MAXIMUM ALLOWABLE DEPTH.
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.50 FLOOD WIDTH(FEET) = 42.00
FLOW VELOCITY(FEET/SEC.) = 1.89 DEPTH*VELOCITY(FT*FT/SEC) = 0.95
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 47.00 = 1100.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 47.00 TO NODE 47.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 15.14
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.280
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.33 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.33 SUBAREA RUNOFF(CFS) = 0.96
EFFECTIVE AREA(ACRES) = 6.16 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 6.2 PEAK FLOW RATE(CFS) = 17.97
****************************************************************************
FLOW PROCESS FROM NODE 47.00 TO NODE 14.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 237.60
DOWNSTREAM NODE ELEVATION(FEET) = 237.00
CHANNEL LENGTH THRU SUBAREA(FEET) = 220.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 1.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.069
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
Page 15
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COMMERCIAL A 0.50 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 18.65
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.98
AVERAGE FLOW DEPTH(FEET) = 0.51 FLOOD WIDTH(FEET) = 43.07
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.86 Tc(MIN.) = 17.00
SUBAREA AREA(ACRES) = 0.50 SUBAREA RUNOFF(CFS) = 1.36
EFFECTIVE AREA(ACRES) = 6.66 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 6.7 PEAK FLOW RATE(CFS) = 18.16
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.51 FLOOD WIDTH(FEET) = 42.72
FLOW VELOCITY(FEET/SEC.) = 1.96 DEPTH*VELOCITY(FT*FT/SEC) = 0.99
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 18.16 16.99 3.069 0.40( 0.04) 0.10 6.7 43.00
2 17.76 18.02 2.968 0.40( 0.04) 0.10 6.7 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 20.26 14.59 3.350 0.40( 0.10) 0.25 6.9 10.00
2 20.30 15.70 3.212 0.40( 0.10) 0.25 7.2 20.00
3 20.16 16.16 3.159 0.40( 0.10) 0.25 7.3 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 14.00 = 1150.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 37.30 14.59 3.350 0.40( 0.07) 0.18 12.6 10.00
2 37.87 15.70 3.212 0.40( 0.07) 0.18 13.4 20.00
3 37.95 16.16 3.159 0.40( 0.07) 0.18 13.7 30.00
4 37.73 16.99 3.069 0.40( 0.07) 0.18 14.0 43.00
5 36.67 18.02 2.968 0.40( 0.07) 0.18 14.1 40.00
TOTAL AREA(ACRES) = 14.1
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 37.95 Tc(MIN.) = 16.157
EFFECTIVE AREA(ACRES) = 13.65 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18
TOTAL AREA(ACRES) = 14.1
Page 16
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LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 14.00 TO NODE 15.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.00 DOWNSTREAM(FEET) = 235.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 145.00 CHANNEL SLOPE = 0.0131
CHANNEL FLOW THRU SUBAREA(CFS) = 37.95
FLOW VELOCITY(FEET/SEC) = 4.09 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 0.59 Tc(MIN.) = 16.75
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 15.00 = 1465.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 15.00 TO NODE 15.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 16.75
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.095
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.16 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.40
EFFECTIVE AREA(ACRES) = 13.81 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 14.2 PEAK FLOW RATE(CFS) = 37.95
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 15.00 TO NODE 15.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 16.75
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.095
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.25 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
Page 17
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SUBAREA AREA(ACRES) = 1.25 SUBAREA RUNOFF(CFS) = 3.44
EFFECTIVE AREA(ACRES) = 15.06 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18
TOTAL AREA(ACRES) = 15.5 PEAK FLOW RATE(CFS) = 40.99
****************************************************************************
FLOW PROCESS FROM NODE 15.00 TO NODE 16.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.10 DOWNSTREAM(FEET) = 234.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 205.00 CHANNEL SLOPE = 0.0049
CHANNEL FLOW THRU SUBAREA(CFS) = 40.99
FLOW VELOCITY(FEET/SEC) = 2.55 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 1.34 Tc(MIN.) = 18.09
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 18.09
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 2.962
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.30 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.71
EFFECTIVE AREA(ACRES) = 15.36 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 15.8 PEAK FLOW RATE(CFS) = 40.99
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 245.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.50
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
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SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.248
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.644
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.84 0.40 0.100 52 8.25
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 3.48
TOTAL AREA(ACRES) = 0.84 PEAK FLOW RATE(CFS) = 3.48
****************************************************************************
FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 238.00 DOWNSTREAM(FEET) = 237.50
FLOW LENGTH(FEET) = 125.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 4.43
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 3.48
PIPE TRAVEL TIME(MIN.) = 0.47 Tc(MIN.) = 8.72
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 52.00 = 370.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 52.00 TO NODE 52.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 8.72
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.499
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.28 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.28 SUBAREA RUNOFF(CFS) = 5.14
EFFECTIVE AREA(ACRES) = 2.12 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.1 PEAK FLOW RATE(CFS) = 8.51
****************************************************************************
FLOW PROCESS FROM NODE 52.00 TO NODE 53.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.50
FLOW LENGTH(FEET) = 330.00 MANNING'S N = 0.011
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ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 10.83
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 8.51
PIPE TRAVEL TIME(MIN.) = 0.51 Tc(MIN.) = 9.23
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 53.00 = 700.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 53.00 TO NODE 53.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.23
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.356
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.63 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.63 SUBAREA RUNOFF(CFS) = 6.33
EFFECTIVE AREA(ACRES) = 3.75 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 3.8 PEAK FLOW RATE(CFS) = 14.57
****************************************************************************
FLOW PROCESS FROM NODE 53.00 TO NODE 54.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.50 DOWNSTREAM(FEET) = 236.30
FLOW LENGTH(FEET) = 30.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 18.54
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 14.57
PIPE TRAVEL TIME(MIN.) = 0.03 Tc(MIN.) = 9.25
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 54.00 = 730.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 54.00 TO NODE 54.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.25
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.348
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.49 0.40 0.100 52
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SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.49 SUBAREA RUNOFF(CFS) = 1.90
EFFECTIVE AREA(ACRES) = 4.24 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.2 PEAK FLOW RATE(CFS) = 16.44
****************************************************************************
FLOW PROCESS FROM NODE 54.00 TO NODE 55.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.30 DOWNSTREAM(FEET) = 235.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00 CHANNEL SLOPE = 0.0050
CHANNEL FLOW THRU SUBAREA(CFS) = 16.44
FLOW VELOCITY(FEET/SEC) = 2.01 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 1.33 Tc(MIN.) = 10.58
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 55.00 = 890.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 10.58
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.027
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.31 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.31 SUBAREA RUNOFF(CFS) = 1.11
EFFECTIVE AREA(ACRES) = 4.55 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.5 PEAK FLOW RATE(CFS) = 16.44
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 10.58
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.027
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.19 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.19 SUBAREA RUNOFF(CFS) = 0.63
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EFFECTIVE AREA(ACRES) = 4.74 AREA-AVERAGED Fm(INCH/HR) = 0.05
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13
TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 16.96
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 16.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.50 DOWNSTREAM(FEET) = 234.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 255.00 CHANNEL SLOPE = 0.0055
CHANNEL FLOW THRU SUBAREA(CFS) = 16.96
FLOW VELOCITY(FEET/SEC) = 2.12 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 2.00 Tc(MIN.) = 12.58
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 16.00 = 1145.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 12.58
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.647
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.29 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.29 SUBAREA RUNOFF(CFS) = 0.86
EFFECTIVE AREA(ACRES) = 5.03 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.17
TOTAL AREA(ACRES) = 5.0 PEAK FLOW RATE(CFS) = 16.96
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 16.96 12.58 3.647 0.40( 0.07) 0.17 5.0 50.00
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 16.00 = 1145.00 FEET.
** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 40.50 16.52 3.119 0.40( 0.08) 0.20 14.4 10.00
2 40.95 17.62 3.006 0.40( 0.08) 0.19 15.1 20.00
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3 40.99 18.09 2.962 0.40( 0.08) 0.19 15.4 30.00
4 40.71 18.93 2.886 0.40( 0.08) 0.19 15.7 43.00
5 39.58 19.96 2.799 0.40( 0.08) 0.19 15.8 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 53.14 12.58 3.647 0.40( 0.08) 0.19 16.0 50.00
2 54.96 16.52 3.119 0.40( 0.08) 0.19 19.4 10.00
3 54.87 17.62 3.006 0.40( 0.08) 0.19 20.1 20.00
4 54.70 18.09 2.962 0.40( 0.07) 0.19 20.4 30.00
5 54.06 18.93 2.886 0.40( 0.07) 0.19 20.7 43.00
6 52.52 19.96 2.799 0.40( 0.07) 0.19 20.8 40.00
TOTAL AREA(ACRES) = 20.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 54.96 Tc(MIN.) = 16.521
EFFECTIVE AREA(ACRES) = 19.38 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 20.8
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 16.00 TO NODE 17.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 234.10 DOWNSTREAM(FEET) = 233.20
FLOW LENGTH(FEET) = 55.00 MANNING'S N = 0.013
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 8.75
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 2
PIPE-FLOW(CFS) = 54.96
PIPE TRAVEL TIME(MIN.) = 0.10 Tc(MIN.) = 16.63
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 17.00 = 1725.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 17.00 TO NODE 17.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 16.63
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.108
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.53 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.53 SUBAREA RUNOFF(CFS) = 1.32
Page 23
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EFFECTIVE AREA(ACRES) = 19.91 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21
TOTAL AREA(ACRES) = 21.3 PEAK FLOW RATE(CFS) = 54.96
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 80.00 TO NODE 81.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00
ELEVATION DATA: UPSTREAM(FEET) = 243.30 DOWNSTREAM(FEET) = 240.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.672
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.841
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
PUBLIC PARK A 0.54 0.40 0.850 52 12.19
COMMERCIAL A 0.12 0.40 0.100 52 7.67
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.714
SUBAREA RUNOFF(CFS) = 2.71
TOTAL AREA(ACRES) = 0.66 PEAK FLOW RATE(CFS) = 2.71
****************************************************************************
FLOW PROCESS FROM NODE 81.00 TO NODE 82.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.10 DOWNSTREAM ELEVATION(FEET) = 238.80
STREET LENGTH(FEET) = 150.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 40.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 28.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.13
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.35
HALFSTREET FLOOD WIDTH(FEET) = 11.30
AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.24
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.79
STREET FLOW TRAVEL TIME(MIN.) = 1.11 Tc(MIN.) = 8.79
Page 24
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* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.479
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.11 0.40 0.850 52
COMMERCIAL A 0.11 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.475
SUBAREA AREA(ACRES) = 0.22 SUBAREA RUNOFF(CFS) = 0.85
EFFECTIVE AREA(ACRES) = 0.88 AREA-AVERAGED Fm(INCH/HR) = 0.26
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.65
TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 3.34
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.36 HALFSTREET FLOOD WIDTH(FEET) = 11.63
FLOW VELOCITY(FEET/SEC.) = 2.27 DEPTH*VELOCITY(FT*FT/SEC.) = 0.81
LONGEST FLOWPATH FROM NODE 80.00 TO NODE 82.00 = 470.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 82.00 TO NODE 83.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 238.80 DOWNSTREAM ELEVATION(FEET) = 238.50
STREET LENGTH(FEET) = 90.00 CURB HEIGHT(INCHES) = 8.0
STREET HALFWIDTH(FEET) = 84.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 30.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.62
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.44
HALFSTREET FLOOD WIDTH(FEET) = 14.31
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.62
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.72
STREET FLOW TRAVEL TIME(MIN.) = 0.93 Tc(MIN.) = 9.71
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.229
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.16 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.56
EFFECTIVE AREA(ACRES) = 1.04 AREA-AVERAGED Fm(INCH/HR) = 0.27
Page 25
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AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.68
TOTAL AREA(ACRES) = 1.0 PEAK FLOW RATE(CFS) = 3.70
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.45 HALFSTREET FLOOD WIDTH(FEET) = 14.42
FLOW VELOCITY(FEET/SEC.) = 1.63 DEPTH*VELOCITY(FT*FT/SEC.) = 0.73
LONGEST FLOWPATH FROM NODE 80.00 TO NODE 83.00 = 560.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 90.00 TO NODE 91.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 280.00
ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.937
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.436
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.64 0.40 0.100 52 8.94
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.53
TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 2.53
****************************************************************************
FLOW PROCESS FROM NODE 91.00 TO NODE 92.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.90 DOWNSTREAM ELEVATION(FEET) = 239.50
STREET LENGTH(FEET) = 270.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.43
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.39
HALFSTREET FLOOD WIDTH(FEET) = 13.06
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.88
Page 26
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PCEX100
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.73
STREET FLOW TRAVEL TIME(MIN.) = 2.39 Tc(MIN.) = 11.33
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.872
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.52 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.52 SUBAREA RUNOFF(CFS) = 1.79
EFFECTIVE AREA(ACRES) = 1.16 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 4.00
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.40 HALFSTREET FLOOD WIDTH(FEET) = 13.94
FLOW VELOCITY(FEET/SEC.) = 1.94 DEPTH*VELOCITY(FT*FT/SEC.) = 0.79
LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 92.00 TO NODE 92.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 100.00 TO NODE 101.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 295.00
ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.221
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.357
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.79 0.40 0.100 52 9.22
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 3.07
TOTAL AREA(ACRES) = 0.79 PEAK FLOW RATE(CFS) = 3.07
****************************************************************************
FLOW PROCESS FROM NODE 101.00 TO NODE 92.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.22
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.357
Page 27
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SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.44 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.44 SUBAREA RUNOFF(CFS) = 1.71
EFFECTIVE AREA(ACRES) = 1.23 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 4.78
****************************************************************************
FLOW PROCESS FROM NODE 92.00 TO NODE 92.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 4.78 9.22 4.357 0.40( 0.04) 0.10 1.2 100.00
LONGEST FLOWPATH FROM NODE 100.00 TO NODE 92.00 = 295.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 4.00 11.33 3.872 0.40( 0.04) 0.10 1.2 90.00
LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 8.45 9.22 4.357 0.40( 0.04) 0.10 2.2 100.00
2 8.24 11.33 3.872 0.40( 0.04) 0.10 2.4 90.00
TOTAL AREA(ACRES) = 2.4
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 8.45 Tc(MIN.) = 9.221
EFFECTIVE AREA(ACRES) = 2.17 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.4
LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 92.00 TO NODE 93.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.50 DOWNSTREAM ELEVATION(FEET) = 239.10
STREET LENGTH(FEET) = 100.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
Page 28
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PCEX100
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 8.63
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.52
HALFSTREET FLOOD WIDTH(FEET) = 20.90
AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.13
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 1.11
STREET FLOW TRAVEL TIME(MIN.) = 0.78 Tc(MIN.) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.159
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.10 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.10 SUBAREA RUNOFF(CFS) = 0.37
EFFECTIVE AREA(ACRES) = 2.27 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.5 PEAK FLOW RATE(CFS) = 8.45
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.52 HALFSTREET FLOOD WIDTH(FEET) = 20.71
FLOW VELOCITY(FEET/SEC.) = 2.11 DEPTH*VELOCITY(FT*FT/SEC.) = 1.10
LONGEST FLOWPATH FROM NODE 90.00 TO NODE 93.00 = 650.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 94.00 TO NODE 95.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 190.00
ELEVATION DATA: UPSTREAM(FEET) = 242.10 DOWNSTREAM(FEET) = 240.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.165
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.488
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.39 0.40 0.100 52 6.16
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.91
Page 29
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PCEX100
TOTAL AREA(ACRES) = 0.39 PEAK FLOW RATE(CFS) = 1.91
****************************************************************************
FLOW PROCESS FROM NODE 96.00 TO NODE 97.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00
ELEVATION DATA: UPSTREAM(FEET) = 241.30 DOWNSTREAM(FEET) = 240.20
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.165
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.035
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.52 0.40 0.100 52 7.16
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.34
TOTAL AREA(ACRES) = 0.52 PEAK FLOW RATE(CFS) = 2.34
****************************************************************************
FLOW PROCESS FROM NODE 98.00 TO NODE 99.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 160.00
ELEVATION DATA: UPSTREAM(FEET) = 241.40 DOWNSTREAM(FEET) = 240.70
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.860
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.162
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.06 0.40 0.100 52 6.86
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 4.89
TOTAL AREA(ACRES) = 1.06 PEAK FLOW RATE(CFS) = 4.89
****************************************************************************
FLOW PROCESS FROM NODE 102.00 TO NODE 103.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 150.00
ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 241.30
Page 30
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PCEX100
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.029
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.558
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.27 0.40 0.100 52 6.03
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.34
TOTAL AREA(ACRES) = 0.27 PEAK FLOW RATE(CFS) = 1.34
============================================================================
END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 0.3 TC(MIN.) = 6.03
EFFECTIVE AREA(ACRES) = 0.27 AREA-AVERAGED Fm(INCH/HR)= 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.100
PEAK FLOW RATE(CFS) = 1.34
============================================================================
============================================================================
END OF RATIONAL METHOD ANALYSIS
�
Page 31
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HYDROLOGY REPORT August 2017
Pacific Center City of Anaheim, CA
APPENDIX 3
10-Year Hydrology Study, Proposed Condition
Page 112
PCPD10
____________________________________________________________________________
****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE
(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)
(c) Copyright 1983-2014 Advanced Engineering Software (aes)
Ver. 21.0 Release Date: 06/01/2014 License ID 1355
Analysis prepared by:
Fuscoe Engineering
16795 Von Karman Ave
Suite 100
Irvine CA, 92606
************************** DESCRIPTION OF STUDY **************************
* PACIFIC CENTER - ANAHEIM *
* PROPOSED DEVELOPMENT HYDROLOGY *
* 10 YEAR EVENT *
**************************************************************************
FILE NAME: PCPD10.DAT
TIME/DATE OF STUDY: 11:33 07/31/2017
============================================================================
USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
============================================================================
--*TIME-OF-CONCENTRATION MODEL*--
USER SPECIFIED STORM EVENT(YEAR) = 10.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90
*DATA BANK RAINFALL USED*
*ANTECEDENT MOISTURE CONDITION (AMC) II ASSUMED FOR RATIONAL METHOD*
*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL*
HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR
NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)
=== ===== ========= ================= ====== ===== ====== ===== =======
1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150
GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.50 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 5.0 (FT*FT/S)
*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN
OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*
*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED
****************************************************************************
FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
Page 1
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PCPD10
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 370.00
ELEVATION DATA: UPSTREAM(FEET) = 243.30 DOWNSTREAM(FEET) = 239.00
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.410
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.014
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
APARTMENTS A 0.89 0.40 0.200 32 8.41
PUBLIC PARK A 0.21 0.40 0.850 32 12.54
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.324
SUBAREA RUNOFF(CFS) = 2.86
TOTAL AREA(ACRES) = 1.10 PEAK FLOW RATE(CFS) = 2.86
****************************************************************************
FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 275.00
ELEVATION DATA: UPSTREAM(FEET) = 243.00 DOWNSTREAM(FEET) = 240.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.615
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.190
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
APARTMENTS A 0.58 0.40 0.200 32 7.61
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200
SUBAREA RUNOFF(CFS) = 1.62
TOTAL AREA(ACRES) = 0.58 PEAK FLOW RATE(CFS) = 1.62
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 7.61
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.190
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
Page 2
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PCPD10
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
APARTMENTS A 0.37 0.40 0.200 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200
SUBAREA AREA(ACRES) = 0.37 SUBAREA RUNOFF(CFS) = 1.04
EFFECTIVE AREA(ACRES) = 0.95 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 2.66
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.10 DOWNSTREAM ELEVATION(FEET) = 238.80
STREET LENGTH(FEET) = 150.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 40.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.96
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.35
HALFSTREET FLOOD WIDTH(FEET) = 11.08
AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.20
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.76
STREET FLOW TRAVEL TIME(MIN.) = 1.14 Tc(MIN.) = 8.75
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.945
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
APARTMENTS A 0.23 0.40 0.200 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200
SUBAREA AREA(ACRES) = 0.23 SUBAREA RUNOFF(CFS) = 0.59
EFFECTIVE AREA(ACRES) = 1.18 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.04
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.35 HALFSTREET FLOOD WIDTH(FEET) = 11.22
FLOW VELOCITY(FEET/SEC.) = 2.21 DEPTH*VELOCITY(FT*FT/SEC.) = 0.77
LONGEST FLOWPATH FROM NODE 12.00 TO NODE 14.00 = 425.00 FEET.
****************************************************************************
Page 3
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PCPD10
FLOW PROCESS FROM NODE 14.00 TO NODE 11.10 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 238.80 DOWNSTREAM ELEVATION(FEET) = 238.50
STREET LENGTH(FEET) = 90.00 CURB HEIGHT(INCHES) = 8.0
STREET HALFWIDTH(FEET) = 84.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 30.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.06
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.42
HALFSTREET FLOOD WIDTH(FEET) = 13.30
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.56
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.66
STREET FLOW TRAVEL TIME(MIN.) = 0.96 Tc(MIN.) = 9.71
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.775
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.01 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.01 SUBAREA RUNOFF(CFS) = 0.02
EFFECTIVE AREA(ACRES) = 1.19 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.04
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.42 HALFSTREET FLOOD WIDTH(FEET) = 13.30
FLOW VELOCITY(FEET/SEC.) = 1.55 DEPTH*VELOCITY(FT*FT/SEC.) = 0.66
LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 11.10 TO NODE 11.10 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 3.04 9.71 2.775 0.40( 0.08) 0.20 1.2 12.00
Page 4
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LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 2.86 8.41 3.014 0.40( 0.13) 0.32 1.1 10.00
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 11.10 = 370.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 5.72 8.41 3.014 0.40( 0.11) 0.26 2.1 10.00
2 5.66 9.71 2.775 0.40( 0.10) 0.26 2.3 12.00
TOTAL AREA(ACRES) = 2.3
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 5.72 Tc(MIN.) = 8.410
EFFECTIVE AREA(ACRES) = 2.13 AREA-AVERAGED Fm(INCH/HR) = 0.11
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.26
TOTAL AREA(ACRES) = 2.3
LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 11.10 TO NODE 11.10 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 20.00 TO NODE 21.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00
ELEVATION DATA: UPSTREAM(FEET) = 242.90 DOWNSTREAM(FEET) = 238.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.540
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.208
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
APARTMENTS A 0.86 0.40 0.200 32 7.54
PUBLIC PARK A 0.38 0.40 0.850 32 11.24
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.399
SUBAREA RUNOFF(CFS) = 3.40
TOTAL AREA(ACRES) = 1.24 PEAK FLOW RATE(CFS) = 3.40
****************************************************************************
FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 56
----------------------------------------------------------------------------
Page 5
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>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 238.10 DOWNSTREAM(FEET) = 237.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 150.00 CHANNEL SLOPE = 0.0040
GIVEN CHANNEL BASE(FEET) = 4.00 CHANNEL FREEBOARD(FEET) = 1.0
"Z" FACTOR = 0.000 MANNING'S FACTOR = 0.015
*ESTIMATED CHANNEL HEIGHT(FEET) = 1.35
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.008
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.20 0.40 0.100 32
PUBLIC PARK A 0.16 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.433
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.86
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.79
AVERAGE FLOW DEPTH(FEET) = 0.35 TRAVEL TIME(MIN.) = 0.90
Tc(MIN.) = 8.44
SUBAREA AREA(ACRES) = 0.36 SUBAREA RUNOFF(CFS) = 0.92
EFFECTIVE AREA(ACRES) = 1.60 AREA-AVERAGED Fm(INCH/HR) = 0.16
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.41
TOTAL AREA(ACRES) = 1.6 PEAK FLOW RATE(CFS) = 4.10
GIVEN CHANNEL BASE(FEET) = 4.00 CHANNEL FREEBOARD(FEET) = 1.0
"Z" FACTOR = 0.000 MANNING'S FACTOR = 0.015
*ESTIMATED CHANNEL HEIGHT(FEET) = 1.36
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.36 FLOW VELOCITY(FEET/SEC.) = 2.83
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 470.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 30.00 TO NODE 31.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 380.00
ELEVATION DATA: UPSTREAM(FEET) = 243.00 DOWNSTREAM(FEET) = 239.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.176
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.063
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
Page 6
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COMMERCIAL A 1.66 0.40 0.100 32 8.18
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 4.52
TOTAL AREA(ACRES) = 1.66 PEAK FLOW RATE(CFS) = 4.52
****************************************************************************
FLOW PROCESS FROM NODE 31.00 TO NODE 22.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.10
DOWNSTREAM NODE ELEVATION(FEET) = 237.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 360.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 1.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.540
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.91 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.67
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.90
AVERAGE FLOW DEPTH(FEET) = 0.34 FLOOD WIDTH(FEET) = 25.86
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 3.16 Tc(MIN.) = 11.33
SUBAREA AREA(ACRES) = 1.91 SUBAREA RUNOFF(CFS) = 4.30
EFFECTIVE AREA(ACRES) = 3.57 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 3.6 PEAK FLOW RATE(CFS) = 8.03
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 27.94
FLOW VELOCITY(FEET/SEC.) = 1.97 DEPTH*VELOCITY(FT*FT/SEC) = 0.71
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 8.03 11.33 2.540 0.40( 0.04) 0.10 3.6 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
Page 7
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NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 4.10 8.44 3.008 0.40( 0.16) 0.41 1.6 20.00
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 470.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 11.20 8.44 3.008 0.40( 0.09) 0.22 4.3 20.00
2 11.46 11.33 2.540 0.40( 0.08) 0.19 5.2 30.00
TOTAL AREA(ACRES) = 5.2
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 11.46 Tc(MIN.) = 11.334
EFFECTIVE AREA(ACRES) = 5.17 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.22
TOTAL AREA(ACRES) = 5.2
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 51
----------------------------------------------------------------------------
>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.80
CHANNEL LENGTH THRU SUBAREA(FEET) = 70.00 CHANNEL SLOPE = 0.0100
CHANNEL BASE(FEET) = 4.00 "Z" FACTOR = 0.000
MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.513
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.08 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 11.53
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.51
AVERAGE FLOW DEPTH(FEET) = 0.52 TRAVEL TIME(MIN.) = 0.21
Tc(MIN.) = 11.55
SUBAREA AREA(ACRES) = 0.08 SUBAREA RUNOFF(CFS) = 0.16
EFFECTIVE AREA(ACRES) = 5.25 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 5.2 PEAK FLOW RATE(CFS) = 11.49
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.52 FLOW VELOCITY(FEET/SEC.) = 5.51
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 810.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<<
============================================================================
Page 8
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PCPD10
****************************************************************************
FLOW PROCESS FROM NODE 40.00 TO NODE 41.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 300.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.60
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.513
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.808
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.69 0.40 0.100 32 9.51
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.72
TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 1.72
****************************************************************************
FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.60 DOWNSTREAM ELEVATION(FEET) = 239.50
STREET LENGTH(FEET) = 300.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 40.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.14
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.36
HALFSTREET FLOOD WIDTH(FEET) = 11.58
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.46
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.52
STREET FLOW TRAVEL TIME(MIN.) = 3.41 Tc(MIN.) = 12.93
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.356
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.40 0.40 0.100 32
Page 9
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PCPD10
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.40 SUBAREA RUNOFF(CFS) = 0.83
EFFECTIVE AREA(ACRES) = 1.09 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.1 PEAK FLOW RATE(CFS) = 2.27
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.36 HALFSTREET FLOOD WIDTH(FEET) = 11.87
FLOW VELOCITY(FEET/SEC.) = 1.49 DEPTH*VELOCITY(FT*FT/SEC.) = 0.54
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 50.00 TO NODE 45.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.20
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.358
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.835
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.72 0.40 0.100 32 9.36
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 4.33
TOTAL AREA(ACRES) = 1.72 PEAK FLOW RATE(CFS) = 4.33
****************************************************************************
FLOW PROCESS FROM NODE 45.00 TO NODE 42.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 240.20
DOWNSTREAM NODE ELEVATION(FEET) = 239.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.608
SUBAREA LOSS RATE DATA(AMC II):
Page 10
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PCPD10
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.15 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 5.66
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.82
AVERAGE FLOW DEPTH(FEET) = 0.32 FLOOD WIDTH(FEET) = 24.25
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.46 Tc(MIN.) = 10.82
SUBAREA AREA(ACRES) = 1.15 SUBAREA RUNOFF(CFS) = 2.66
EFFECTIVE AREA(ACRES) = 2.87 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.9 PEAK FLOW RATE(CFS) = 6.63
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.34 FLOOD WIDTH(FEET) = 25.93
FLOW VELOCITY(FEET/SEC.) = 1.88 DEPTH*VELOCITY(FT*FT/SEC) = 0.64
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 42.00 = 490.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 6.63 10.82 2.608 0.40( 0.04) 0.10 2.9 50.00
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 42.00 = 490.00 FEET.
** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 2.27 12.93 2.356 0.40( 0.04) 0.10 1.1 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 8.74 10.82 2.608 0.40( 0.04) 0.10 3.8 50.00
2 8.25 12.93 2.356 0.40( 0.04) 0.10 4.0 40.00
TOTAL AREA(ACRES) = 4.0
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 8.74 Tc(MIN.) = 10.822
EFFECTIVE AREA(ACRES) = 3.78 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.0
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 43.00 IS CODE = 91
Page 11
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PCPD10
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.50
DOWNSTREAM NODE ELEVATION(FEET) = 239.20
CHANNEL LENGTH THRU SUBAREA(FEET) = 50.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.559
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.40 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 9.20
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.29
AVERAGE FLOW DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 27.76
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.36 Tc(MIN.) = 11.19
SUBAREA AREA(ACRES) = 0.40 SUBAREA RUNOFF(CFS) = 0.91
EFFECTIVE AREA(ACRES) = 4.18 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.4 PEAK FLOW RATE(CFS) = 9.48
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 28.06
FLOW VELOCITY(FEET/SEC.) = 2.31 DEPTH*VELOCITY(FT*FT/SEC) = 0.83
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 43.00 = 650.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 43.00 TO NODE 23.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.20 DOWNSTREAM(FEET) = 236.80
FLOW LENGTH(FEET) = 450.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 12.07
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 9.48
PIPE TRAVEL TIME(MIN.) = 0.62 Tc(MIN.) = 11.81
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
Page 12
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** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 9.48 11.81 2.481 0.40( 0.04) 0.10 4.2 50.00
2 8.94 13.96 2.254 0.40( 0.04) 0.10 4.4 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.
** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 11.22 8.65 2.965 0.40( 0.09) 0.23 4.3 20.00
2 11.49 11.55 2.513 0.40( 0.08) 0.20 5.2 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 810.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 19.55 8.65 2.965 0.40( 0.07) 0.17 7.4 20.00
2 20.88 11.55 2.513 0.40( 0.06) 0.16 9.3 30.00
3 20.82 11.81 2.481 0.40( 0.06) 0.16 9.4 50.00
4 19.20 13.96 2.254 0.40( 0.06) 0.16 9.6 40.00
TOTAL AREA(ACRES) = 9.6
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 20.88 Tc(MIN.) = 11.546
EFFECTIVE AREA(ACRES) = 9.34 AREA-AVERAGED Fm(INCH/HR) = 0.06
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.16
TOTAL AREA(ACRES) = 9.6
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 24.00 IS CODE = 51
----------------------------------------------------------------------------
>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.80 DOWNSTREAM(FEET) = 235.80
CHANNEL LENGTH THRU SUBAREA(FEET) = 250.00 CHANNEL SLOPE = 0.0040
CHANNEL BASE(FEET) = 7.00 "Z" FACTOR = 0.000
MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.50
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.406
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
APARTMENTS A 2.78 0.40 0.200 32
PUBLIC PARK A 0.29 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.261
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 24.06
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 4.57
AVERAGE FLOW DEPTH(FEET) = 0.75 TRAVEL TIME(MIN.) = 0.91
Tc(MIN.) = 12.46
SUBAREA AREA(ACRES) = 3.07 SUBAREA RUNOFF(CFS) = 6.36
Page 13
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EFFECTIVE AREA(ACRES) = 12.41 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18
TOTAL AREA(ACRES) = 12.7 PEAK FLOW RATE(CFS) = 26.05
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.80 FLOW VELOCITY(FEET/SEC.) = 4.67
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 24.00 = 1350.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 24.00 TO NODE 25.00 IS CODE = 51
----------------------------------------------------------------------------
>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.80 DOWNSTREAM(FEET) = 235.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 135.00 CHANNEL SLOPE = 0.0052
CHANNEL BASE(FEET) = 7.00 "Z" FACTOR = 0.000
MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.358
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.15 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 26.19
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.09
AVERAGE FLOW DEPTH(FEET) = 0.74 TRAVEL TIME(MIN.) = 0.44
Tc(MIN.) = 12.90
SUBAREA AREA(ACRES) = 0.15 SUBAREA RUNOFF(CFS) = 0.27
EFFECTIVE AREA(ACRES) = 12.56 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 12.8 PEAK FLOW RATE(CFS) = 26.05
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.73 FLOW VELOCITY(FEET/SEC.) = 5.10
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 25.00 = 1485.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 25.00 TO NODE 25.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 12.90
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.358
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.53 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.53 SUBAREA RUNOFF(CFS) = 3.19
Page 14
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EFFECTIVE AREA(ACRES) = 14.09 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18
TOTAL AREA(ACRES) = 14.4 PEAK FLOW RATE(CFS) = 28.98
****************************************************************************
FLOW PROCESS FROM NODE 25.00 TO NODE 26.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.10 DOWNSTREAM(FEET) = 234.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 205.00 CHANNEL SLOPE = 0.0049
CHANNEL FLOW THRU SUBAREA(CFS) = 28.98
FLOW VELOCITY(FEET/SEC) = 2.32 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 1.47 Tc(MIN.) = 14.37
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 26.00 = 1690.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 14.37
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.217
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.29 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.29 SUBAREA RUNOFF(CFS) = 0.49
EFFECTIVE AREA(ACRES) = 14.38 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 14.6 PEAK FLOW RATE(CFS) = 28.98
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 1
----------------------------------------------------------------------------
>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
============================================================================
TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:
TIME OF CONCENTRATION(MIN.) = 14.37
RAINFALL INTENSITY(INCH/HR) = 2.22
AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40
AREA-AVERAGED Ap = 0.20
EFFECTIVE STREAM AREA(ACRES) = 14.38
TOTAL STREAM AREA(ACRES) = 14.65
PEAK FLOW RATE(CFS) AT CONFLUENCE = 28.98
****************************************************************************
Page 15
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FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 245.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.50
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.248
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.047
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.88 0.40 0.100 32 8.25
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.38
TOTAL AREA(ACRES) = 0.88 PEAK FLOW RATE(CFS) = 2.38
****************************************************************************
FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 238.00 DOWNSTREAM(FEET) = 237.50
FLOW LENGTH(FEET) = 125.00 MANNING'S N = 0.011
DEPTH OF FLOW IN 12.0 INCH PIPE IS 9.3 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 3.65
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 2.38
PIPE TRAVEL TIME(MIN.) = 0.57 Tc(MIN.) = 8.82
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 52.00 = 370.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 52.00 TO NODE 52.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 8.82
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.933
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.21 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.21 SUBAREA RUNOFF(CFS) = 3.15
EFFECTIVE AREA(ACRES) = 2.09 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.1 PEAK FLOW RATE(CFS) = 5.44
Page 16
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****************************************************************************
FLOW PROCESS FROM NODE 52.00 TO NODE 53.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.30
FLOW LENGTH(FEET) = 330.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 6.93
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 5.44
PIPE TRAVEL TIME(MIN.) = 0.79 Tc(MIN.) = 9.61
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 53.00 = 700.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 53.00 TO NODE 53.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.61
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.791
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.63 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.63 SUBAREA RUNOFF(CFS) = 4.04
EFFECTIVE AREA(ACRES) = 3.72 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 3.7 PEAK FLOW RATE(CFS) = 9.21
****************************************************************************
FLOW PROCESS FROM NODE 53.00 TO NODE 54.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.50 DOWNSTREAM(FEET) = 236.30
FLOW LENGTH(FEET) = 30.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 11.73
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 9.21
PIPE TRAVEL TIME(MIN.) = 0.04 Tc(MIN.) = 9.66
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 54.00 = 730.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 54.00 TO NODE 54.00 IS CODE = 81
----------------------------------------------------------------------------
Page 17
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PCPD10
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.66
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.784
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.51 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.51 SUBAREA RUNOFF(CFS) = 1.26
EFFECTIVE AREA(ACRES) = 4.23 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.2 PEAK FLOW RATE(CFS) = 10.45
****************************************************************************
FLOW PROCESS FROM NODE 54.00 TO NODE 55.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.30 DOWNSTREAM(FEET) = 235.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00 CHANNEL SLOPE = 0.0050
CHANNEL FLOW THRU SUBAREA(CFS) = 10.45
FLOW VELOCITY(FEET/SEC) = 1.79 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 1.49 Tc(MIN.) = 11.15
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 55.00 = 890.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 11.15
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.564
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.18 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.18 SUBAREA RUNOFF(CFS) = 0.36
EFFECTIVE AREA(ACRES) = 4.41 AREA-AVERAGED Fm(INCH/HR) = 0.05
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13
TOTAL AREA(ACRES) = 4.4 PEAK FLOW RATE(CFS) = 10.45
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 11.15
Page 18
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PCPD10
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.564
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.31 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.31 SUBAREA RUNOFF(CFS) = 0.70
EFFECTIVE AREA(ACRES) = 4.72 AREA-AVERAGED Fm(INCH/HR) = 0.05
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13
TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 10.67
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 26.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.50 DOWNSTREAM(FEET) = 234.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 255.00 CHANNEL SLOPE = 0.0055
CHANNEL FLOW THRU SUBAREA(CFS) = 10.67
FLOW VELOCITY(FEET/SEC) = 1.88 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 2.26 Tc(MIN.) = 13.40
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 26.00 = 1145.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 13.40
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.307
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.30 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.53
EFFECTIVE AREA(ACRES) = 5.02 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.17
TOTAL AREA(ACRES) = 5.0 PEAK FLOW RATE(CFS) = 10.67
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 1
----------------------------------------------------------------------------
>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<<
============================================================================
TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:
TIME OF CONCENTRATION(MIN.) = 13.40
Page 19
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RAINFALL INTENSITY(INCH/HR) = 2.31
AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40
AREA-AVERAGED Ap = 0.17
EFFECTIVE STREAM AREA(ACRES) = 5.02
TOTAL STREAM AREA(ACRES) = 5.02
PEAK FLOW RATE(CFS) AT CONFLUENCE = 10.67
** CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 28.96 11.49 2.520 0.40( 0.08) 0.21 12.4 20.00
1 28.98 14.37 2.217 0.40( 0.08) 0.20 14.4 30.00
1 28.83 14.64 2.193 0.40( 0.08) 0.20 14.5 50.00
1 26.65 16.86 2.023 0.40( 0.08) 0.19 14.6 40.00
2 10.67 13.40 2.307 0.40( 0.07) 0.17 5.0 50.00
RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO
CONFLUENCE FORMULA USED FOR 2 STREAMS.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 38.98 11.49 2.520 0.40( 0.08) 0.20 16.7 20.00
2 39.65 13.40 2.307 0.40( 0.08) 0.19 18.7 50.00
3 39.22 14.37 2.217 0.40( 0.08) 0.19 19.4 30.00
4 38.96 14.64 2.193 0.40( 0.08) 0.19 19.5 50.00
5 35.97 16.86 2.023 0.40( 0.08) 0.19 19.7 40.00
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 39.65 Tc(MIN.) = 13.40
EFFECTIVE AREA(ACRES) = 18.75 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 19.7
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 26.00 = 1690.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 27.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 234.10 DOWNSTREAM(FEET) = 233.20
FLOW LENGTH(FEET) = 55.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 15.1 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 9.52
GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 2
PIPE-FLOW(CFS) = 39.65
PIPE TRAVEL TIME(MIN.) = 0.10 Tc(MIN.) = 13.50
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 27.00 = 1745.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 27.00 TO NODE 27.00 IS CODE = 81
Page 20
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PCPD10
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 13.50
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.298
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.51 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.51 SUBAREA RUNOFF(CFS) = 0.90
EFFECTIVE AREA(ACRES) = 19.26 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21
TOTAL AREA(ACRES) = 20.2 PEAK FLOW RATE(CFS) = 39.65
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 70.00 TO NODE 71.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 280.00
ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.937
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.910
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.69 0.40 0.100 32 8.94
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.78
TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 1.78
****************************************************************************
FLOW PROCESS FROM NODE 71.00 TO NODE 72.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.90 DOWNSTREAM ELEVATION(FEET) = 239.90
STREET LENGTH(FEET) = 200.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
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STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.22
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.35
HALFSTREET FLOOD WIDTH(FEET) = 11.01
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.67
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.58
STREET FLOW TRAVEL TIME(MIN.) = 2.00 Tc(MIN.) = 10.93
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.593
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.38 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.38 SUBAREA RUNOFF(CFS) = 0.87
EFFECTIVE AREA(ACRES) = 1.07 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.1 PEAK FLOW RATE(CFS) = 2.46
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.36 HALFSTREET FLOOD WIDTH(FEET) = 11.49
FLOW VELOCITY(FEET/SEC.) = 1.71 DEPTH*VELOCITY(FT*FT/SEC.) = 0.61
LONGEST FLOWPATH FROM NODE 70.00 TO NODE 72.00 = 480.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 72.00 TO NODE 73.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.90 DOWNSTREAM ELEVATION(FEET) = 239.10
STREET LENGTH(FEET) = 175.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.78
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.37
HALFSTREET FLOOD WIDTH(FEET) = 12.28
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.71
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.63
Page 22
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STREET FLOW TRAVEL TIME(MIN.) = 1.71 Tc(MIN.) = 12.64
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.386
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.30 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.63
EFFECTIVE AREA(ACRES) = 1.37 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.4 PEAK FLOW RATE(CFS) = 2.89
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.38 HALFSTREET FLOOD WIDTH(FEET) = 12.47
FLOW VELOCITY(FEET/SEC.) = 1.73 DEPTH*VELOCITY(FT*FT/SEC.) = 0.65
LONGEST FLOWPATH FROM NODE 70.00 TO NODE 73.00 = 655.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 74.00 TO NODE 75.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 230.00
ELEVATION DATA: UPSTREAM(FEET) = 242.10 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.657
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.180
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.64 0.40 0.100 32 7.66
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.81
TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 1.81
****************************************************************************
FLOW PROCESS FROM NODE 76.00 TO NODE 77.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 230.00
ELEVATION DATA: UPSTREAM(FEET) = 242.50 DOWNSTREAM(FEET) = 241.20
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.536
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.209
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
Page 23
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LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.51 0.40 0.100 32 7.54
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.45
TOTAL AREA(ACRES) = 0.51 PEAK FLOW RATE(CFS) = 1.45
****************************************************************************
FLOW PROCESS FROM NODE 78.00 TO NODE 79.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00
ELEVATION DATA: UPSTREAM(FEET) = 242.50 DOWNSTREAM(FEET) = 240.50
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.357
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.538
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.12 0.40 0.100 32 6.36
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 3.53
TOTAL AREA(ACRES) = 1.12 PEAK FLOW RATE(CFS) = 3.53
****************************************************************************
FLOW PROCESS FROM NODE 80.00 TO NODE 81.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 160.00
ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.890
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.696
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.87 0.40 0.100 32 5.89
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.86
TOTAL AREA(ACRES) = 0.87 PEAK FLOW RATE(CFS) = 2.86
****************************************************************************
FLOW PROCESS FROM NODE 80.00 TO NODE 82.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
Page 24
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PCPD10
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 150.00
ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 241.30
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.029
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.647
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.27 0.40 0.100 32 6.03
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 0.88
TOTAL AREA(ACRES) = 0.27 PEAK FLOW RATE(CFS) = 0.88
============================================================================
END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 0.3 TC(MIN.) = 6.03
EFFECTIVE AREA(ACRES) = 0.27 AREA-AVERAGED Fm(INCH/HR)= 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.100
PEAK FLOW RATE(CFS) = 0.88
============================================================================
============================================================================
END OF RATIONAL METHOD ANALYSIS
�
Page 25
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HYDROLOGY REPORT August 2017
Pacific Center City of Anaheim, CA
APPENDIX 3.1
25-Year Hydrology Study, Proposed Condition
Page 138
PCPD25
____________________________________________________________________________
****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE
(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)
(c) Copyright 1983-2014 Advanced Engineering Software (aes)
Ver. 21.0 Release Date: 06/01/2014 License ID 1355
Analysis prepared by:
Fuscoe Engineering
16795 Von Karman Ave
Suite 100
Irvine CA, 92606
************************** DESCRIPTION OF STUDY **************************
* PACIFIC CENTER - ANAHEIM *
* PROPOSED HYDROLOGY *
* 25 YEAR EVENT *
**************************************************************************
FILE NAME: PCPD25.DAT
TIME/DATE OF STUDY: 13:37 07/31/2017
============================================================================
USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
============================================================================
--*TIME-OF-CONCENTRATION MODEL*--
USER SPECIFIED STORM EVENT(YEAR) = 25.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90
*DATA BANK RAINFALL USED*
*ANTECEDENT MOISTURE CONDITION (AMC) II ASSUMED FOR RATIONAL METHOD*
*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL*
HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR
NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)
=== ===== ========= ================= ====== ===== ====== ===== =======
1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150
GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.50 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 5.0 (FT*FT/S)
*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN
OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*
*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED
****************************************************************************
FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
Page 1
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PCPD25
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 370.00
ELEVATION DATA: UPSTREAM(FEET) = 243.30 DOWNSTREAM(FEET) = 239.00
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.410
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.594
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
APARTMENTS A 0.89 0.40 0.200 32 8.41
PUBLIC PARK A 0.21 0.40 0.850 32 12.54
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.324
SUBAREA RUNOFF(CFS) = 3.43
TOTAL AREA(ACRES) = 1.10 PEAK FLOW RATE(CFS) = 3.43
****************************************************************************
FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 275.00
ELEVATION DATA: UPSTREAM(FEET) = 243.00 DOWNSTREAM(FEET) = 240.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.615
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.802
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
APARTMENTS A 0.58 0.40 0.200 32 7.61
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200
SUBAREA RUNOFF(CFS) = 1.94
TOTAL AREA(ACRES) = 0.58 PEAK FLOW RATE(CFS) = 1.94
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 7.61
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.802
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
Page 2
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PCPD25
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
APARTMENTS A 0.37 0.40 0.200 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200
SUBAREA AREA(ACRES) = 0.37 SUBAREA RUNOFF(CFS) = 1.24
EFFECTIVE AREA(ACRES) = 0.95 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 3.18
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.10 DOWNSTREAM ELEVATION(FEET) = 238.80
STREET LENGTH(FEET) = 150.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 40.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.54
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.37
HALFSTREET FLOOD WIDTH(FEET) = 11.94
AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.29
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.84
STREET FLOW TRAVEL TIME(MIN.) = 1.09 Tc(MIN.) = 8.71
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.524
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
APARTMENTS A 0.23 0.40 0.200 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200
SUBAREA AREA(ACRES) = 0.23 SUBAREA RUNOFF(CFS) = 0.71
EFFECTIVE AREA(ACRES) = 1.18 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.66
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.37 HALFSTREET FLOOD WIDTH(FEET) = 12.09
FLOW VELOCITY(FEET/SEC.) = 2.32 DEPTH*VELOCITY(FT*FT/SEC.) = 0.85
LONGEST FLOWPATH FROM NODE 12.00 TO NODE 14.00 = 425.00 FEET.
****************************************************************************
Page 3
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PCPD25
FLOW PROCESS FROM NODE 14.00 TO NODE 11.10 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 238.80 DOWNSTREAM ELEVATION(FEET) = 238.50
STREET LENGTH(FEET) = 90.00 CURB HEIGHT(INCHES) = 8.0
STREET HALFWIDTH(FEET) = 84.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 30.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.67
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.45
HALFSTREET FLOOD WIDTH(FEET) = 14.37
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.63
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.73
STREET FLOW TRAVEL TIME(MIN.) = 0.92 Tc(MIN.) = 9.63
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.329
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.01 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.01 SUBAREA RUNOFF(CFS) = 0.03
EFFECTIVE AREA(ACRES) = 1.19 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.66
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.45 HALFSTREET FLOOD WIDTH(FEET) = 14.37
FLOW VELOCITY(FEET/SEC.) = 1.62 DEPTH*VELOCITY(FT*FT/SEC.) = 0.72
LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 11.10 TO NODE 11.10 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 3.66 9.63 3.329 0.40( 0.08) 0.20 1.2 12.00
Page 4
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LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 3.43 8.41 3.594 0.40( 0.13) 0.32 1.1 10.00
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 11.10 = 370.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 6.89 8.41 3.594 0.40( 0.11) 0.26 2.1 10.00
2 6.83 9.63 3.329 0.40( 0.10) 0.26 2.3 12.00
TOTAL AREA(ACRES) = 2.3
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 6.89 Tc(MIN.) = 8.410
EFFECTIVE AREA(ACRES) = 2.14 AREA-AVERAGED Fm(INCH/HR) = 0.11
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.26
TOTAL AREA(ACRES) = 2.3
LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 11.10 TO NODE 11.10 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 20.00 TO NODE 21.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00
ELEVATION DATA: UPSTREAM(FEET) = 242.90 DOWNSTREAM(FEET) = 238.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.540
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.823
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
APARTMENTS A 0.86 0.40 0.200 32 7.54
PUBLIC PARK A 0.38 0.40 0.850 32 11.24
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.399
SUBAREA RUNOFF(CFS) = 4.09
TOTAL AREA(ACRES) = 1.24 PEAK FLOW RATE(CFS) = 4.09
****************************************************************************
FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 56
----------------------------------------------------------------------------
Page 5
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>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 238.10 DOWNSTREAM(FEET) = 237.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 150.00 CHANNEL SLOPE = 0.0040
GIVEN CHANNEL BASE(FEET) = 4.00 CHANNEL FREEBOARD(FEET) = 1.0
"Z" FACTOR = 0.000 MANNING'S FACTOR = 0.015
*ESTIMATED CHANNEL HEIGHT(FEET) = 1.39
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.600
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.20 0.40 0.100 32
PUBLIC PARK A 0.16 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.433
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.64
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.96
AVERAGE FLOW DEPTH(FEET) = 0.39 TRAVEL TIME(MIN.) = 0.84
Tc(MIN.) = 8.38
SUBAREA AREA(ACRES) = 0.36 SUBAREA RUNOFF(CFS) = 1.11
EFFECTIVE AREA(ACRES) = 1.60 AREA-AVERAGED Fm(INCH/HR) = 0.16
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.41
TOTAL AREA(ACRES) = 1.6 PEAK FLOW RATE(CFS) = 4.95
GIVEN CHANNEL BASE(FEET) = 4.00 CHANNEL FREEBOARD(FEET) = 1.0
"Z" FACTOR = 0.000 MANNING'S FACTOR = 0.015
*ESTIMATED CHANNEL HEIGHT(FEET) = 1.41
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.41 FLOW VELOCITY(FEET/SEC.) = 3.04
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 470.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 30.00 TO NODE 31.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 380.00
ELEVATION DATA: UPSTREAM(FEET) = 243.00 DOWNSTREAM(FEET) = 239.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.176
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.652
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
Page 6
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COMMERCIAL A 1.66 0.40 0.100 32 8.18
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 5.40
TOTAL AREA(ACRES) = 1.66 PEAK FLOW RATE(CFS) = 5.40
****************************************************************************
FLOW PROCESS FROM NODE 31.00 TO NODE 22.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.10
DOWNSTREAM NODE ELEVATION(FEET) = 237.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 360.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 1.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.051
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.91 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 7.99
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.96
AVERAGE FLOW DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 27.94
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 3.06 Tc(MIN.) = 11.23
SUBAREA AREA(ACRES) = 1.91 SUBAREA RUNOFF(CFS) = 5.18
EFFECTIVE AREA(ACRES) = 3.57 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 3.6 PEAK FLOW RATE(CFS) = 9.67
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 30.20
FLOW VELOCITY(FEET/SEC.) = 2.05 DEPTH*VELOCITY(FT*FT/SEC) = 0.78
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 9.67 11.23 3.051 0.40( 0.04) 0.10 3.6 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
Page 7
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NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 4.95 8.38 3.600 0.40( 0.16) 0.41 1.6 20.00
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 470.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 13.49 8.38 3.600 0.40( 0.09) 0.22 4.3 20.00
2 13.83 11.23 3.051 0.40( 0.08) 0.19 5.2 30.00
TOTAL AREA(ACRES) = 5.2
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 13.83 Tc(MIN.) = 11.232
EFFECTIVE AREA(ACRES) = 5.17 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.22
TOTAL AREA(ACRES) = 5.2
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 51
----------------------------------------------------------------------------
>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.80
CHANNEL LENGTH THRU SUBAREA(FEET) = 70.00 CHANNEL SLOPE = 0.0100
CHANNEL BASE(FEET) = 4.00 "Z" FACTOR = 0.000
MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.021
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.08 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 13.93
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.88
AVERAGE FLOW DEPTH(FEET) = 0.59 TRAVEL TIME(MIN.) = 0.20
Tc(MIN.) = 11.43
SUBAREA AREA(ACRES) = 0.08 SUBAREA RUNOFF(CFS) = 0.19
EFFECTIVE AREA(ACRES) = 5.25 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 5.2 PEAK FLOW RATE(CFS) = 13.89
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.59 FLOW VELOCITY(FEET/SEC.) = 5.88
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 810.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<<
============================================================================
Page 8
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PCPD25
****************************************************************************
FLOW PROCESS FROM NODE 40.00 TO NODE 41.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 300.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.60
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.513
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.352
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.69 0.40 0.100 32 9.51
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.06
TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 2.06
****************************************************************************
FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.60 DOWNSTREAM ELEVATION(FEET) = 239.50
STREET LENGTH(FEET) = 300.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 40.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.56
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.38
HALFSTREET FLOOD WIDTH(FEET) = 12.45
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.54
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.58
STREET FLOW TRAVEL TIME(MIN.) = 3.26 Tc(MIN.) = 12.77
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.837
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.40 0.40 0.100 32
Page 9
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PCPD25
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.40 SUBAREA RUNOFF(CFS) = 1.01
EFFECTIVE AREA(ACRES) = 1.09 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.1 PEAK FLOW RATE(CFS) = 2.74
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.38 HALFSTREET FLOOD WIDTH(FEET) = 12.81
FLOW VELOCITY(FEET/SEC.) = 1.56 DEPTH*VELOCITY(FT*FT/SEC.) = 0.60
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 50.00 TO NODE 45.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.20
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.358
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.383
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.72 0.40 0.100 32 9.36
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 5.17
TOTAL AREA(ACRES) = 1.72 PEAK FLOW RATE(CFS) = 5.17
****************************************************************************
FLOW PROCESS FROM NODE 45.00 TO NODE 42.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 240.20
DOWNSTREAM NODE ELEVATION(FEET) = 239.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.126
SUBAREA LOSS RATE DATA(AMC II):
Page 10
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PCPD25
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.15 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.78
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.90
AVERAGE FLOW DEPTH(FEET) = 0.34 FLOOD WIDTH(FEET) = 26.08
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.40 Tc(MIN.) = 10.76
SUBAREA AREA(ACRES) = 1.15 SUBAREA RUNOFF(CFS) = 3.19
EFFECTIVE AREA(ACRES) = 2.87 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.9 PEAK FLOW RATE(CFS) = 7.97
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 27.91
FLOW VELOCITY(FEET/SEC.) = 1.96 DEPTH*VELOCITY(FT*FT/SEC) = 0.71
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 42.00 = 490.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 7.97 10.76 3.126 0.40( 0.04) 0.10 2.9 50.00
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 42.00 = 490.00 FEET.
** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 2.74 12.77 2.837 0.40( 0.04) 0.10 1.1 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 10.52 10.76 3.126 0.40( 0.04) 0.10 3.8 50.00
2 9.97 12.77 2.837 0.40( 0.04) 0.10 4.0 40.00
TOTAL AREA(ACRES) = 4.0
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 10.52 Tc(MIN.) = 10.762
EFFECTIVE AREA(ACRES) = 3.79 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.0
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 43.00 IS CODE = 91
Page 11
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PCPD25
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.50
DOWNSTREAM NODE ELEVATION(FEET) = 239.20
CHANNEL LENGTH THRU SUBAREA(FEET) = 50.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.070
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.40 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 11.07
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.39
AVERAGE FLOW DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 29.89
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.35 Tc(MIN.) = 11.11
SUBAREA AREA(ACRES) = 0.40 SUBAREA RUNOFF(CFS) = 1.09
EFFECTIVE AREA(ACRES) = 4.19 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.4 PEAK FLOW RATE(CFS) = 11.42
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 30.35
FLOW VELOCITY(FEET/SEC.) = 2.39 DEPTH*VELOCITY(FT*FT/SEC) = 0.92
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 43.00 = 650.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 43.00 TO NODE 23.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.20 DOWNSTREAM(FEET) = 236.80
FLOW LENGTH(FEET) = 450.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 14.54
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 11.42
PIPE TRAVEL TIME(MIN.) = 0.52 Tc(MIN.) = 11.63
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
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** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 11.42 11.63 2.992 0.40( 0.04) 0.10 4.2 50.00
2 10.81 13.67 2.730 0.40( 0.04) 0.10 4.4 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.
** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 13.54 8.58 3.552 0.40( 0.09) 0.23 4.3 20.00
2 13.89 11.43 3.021 0.40( 0.08) 0.20 5.2 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 810.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 23.57 8.58 3.552 0.40( 0.07) 0.17 7.4 20.00
2 25.23 11.43 3.021 0.40( 0.06) 0.16 9.4 30.00
3 25.17 11.63 2.992 0.40( 0.06) 0.16 9.4 50.00
4 23.32 13.67 2.730 0.40( 0.06) 0.16 9.6 40.00
TOTAL AREA(ACRES) = 9.6
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 25.23 Tc(MIN.) = 11.430
EFFECTIVE AREA(ACRES) = 9.37 AREA-AVERAGED Fm(INCH/HR) = 0.06
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.16
TOTAL AREA(ACRES) = 9.6
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 24.00 IS CODE = 51
----------------------------------------------------------------------------
>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.80 DOWNSTREAM(FEET) = 235.80
CHANNEL LENGTH THRU SUBAREA(FEET) = 250.00 CHANNEL SLOPE = 0.0040
CHANNEL BASE(FEET) = 7.00 "Z" FACTOR = 0.000
MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.50
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.900
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
APARTMENTS A 2.78 0.40 0.200 32
PUBLIC PARK A 0.29 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.261
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 29.09
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 4.88
AVERAGE FLOW DEPTH(FEET) = 0.85 TRAVEL TIME(MIN.) = 0.85
Tc(MIN.) = 12.28
SUBAREA AREA(ACRES) = 3.07 SUBAREA RUNOFF(CFS) = 7.72
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EFFECTIVE AREA(ACRES) = 12.44 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18
TOTAL AREA(ACRES) = 12.7 PEAK FLOW RATE(CFS) = 31.64
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.90 FLOW VELOCITY(FEET/SEC.) = 5.01
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 24.00 = 1350.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 24.00 TO NODE 25.00 IS CODE = 51
----------------------------------------------------------------------------
>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.80 DOWNSTREAM(FEET) = 235.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 135.00 CHANNEL SLOPE = 0.0052
CHANNEL BASE(FEET) = 7.00 "Z" FACTOR = 0.000
MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.847
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.15 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 31.81
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.48
AVERAGE FLOW DEPTH(FEET) = 0.83 TRAVEL TIME(MIN.) = 0.41
Tc(MIN.) = 12.69
SUBAREA AREA(ACRES) = 0.15 SUBAREA RUNOFF(CFS) = 0.34
EFFECTIVE AREA(ACRES) = 12.59 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 12.8 PEAK FLOW RATE(CFS) = 31.64
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.83 FLOW VELOCITY(FEET/SEC.) = 5.45
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 25.00 = 1485.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 25.00 TO NODE 25.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 12.69
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.847
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.53 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.53 SUBAREA RUNOFF(CFS) = 3.86
Page 14
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EFFECTIVE AREA(ACRES) = 14.12 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18
TOTAL AREA(ACRES) = 14.4 PEAK FLOW RATE(CFS) = 35.25
****************************************************************************
FLOW PROCESS FROM NODE 25.00 TO NODE 26.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.10 DOWNSTREAM(FEET) = 234.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 205.00 CHANNEL SLOPE = 0.0049
CHANNEL FLOW THRU SUBAREA(CFS) = 35.25
FLOW VELOCITY(FEET/SEC) = 2.45 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 1.40 Tc(MIN.) = 14.09
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 26.00 = 1690.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 14.09
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.683
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.29 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.29 SUBAREA RUNOFF(CFS) = 0.61
EFFECTIVE AREA(ACRES) = 14.41 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 14.6 PEAK FLOW RATE(CFS) = 35.25
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 1
----------------------------------------------------------------------------
>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
============================================================================
TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:
TIME OF CONCENTRATION(MIN.) = 14.09
RAINFALL INTENSITY(INCH/HR) = 2.68
AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40
AREA-AVERAGED Ap = 0.20
EFFECTIVE STREAM AREA(ACRES) = 14.41
TOTAL STREAM AREA(ACRES) = 14.65
PEAK FLOW RATE(CFS) AT CONFLUENCE = 35.25
****************************************************************************
Page 15
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FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 245.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.50
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.248
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.634
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.88 0.40 0.100 32 8.25
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.85
TOTAL AREA(ACRES) = 0.88 PEAK FLOW RATE(CFS) = 2.85
****************************************************************************
FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 238.00 DOWNSTREAM(FEET) = 237.50
FLOW LENGTH(FEET) = 125.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 3.62
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 2.85
PIPE TRAVEL TIME(MIN.) = 0.57 Tc(MIN.) = 8.82
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 52.00 = 370.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 52.00 TO NODE 52.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 8.82
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.498
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.21 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.21 SUBAREA RUNOFF(CFS) = 3.77
EFFECTIVE AREA(ACRES) = 2.09 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.1 PEAK FLOW RATE(CFS) = 6.50
Page 16
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****************************************************************************
FLOW PROCESS FROM NODE 52.00 TO NODE 53.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.30
FLOW LENGTH(FEET) = 330.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 8.28
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 6.50
PIPE TRAVEL TIME(MIN.) = 0.66 Tc(MIN.) = 9.49
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 53.00 = 700.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 53.00 TO NODE 53.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.49
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.357
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.63 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.63 SUBAREA RUNOFF(CFS) = 4.87
EFFECTIVE AREA(ACRES) = 3.72 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 3.7 PEAK FLOW RATE(CFS) = 11.10
****************************************************************************
FLOW PROCESS FROM NODE 53.00 TO NODE 54.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.50 DOWNSTREAM(FEET) = 236.30
FLOW LENGTH(FEET) = 30.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 14.14
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 11.10
PIPE TRAVEL TIME(MIN.) = 0.04 Tc(MIN.) = 9.52
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 54.00 = 730.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 54.00 TO NODE 54.00 IS CODE = 81
Page 17
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PCPD25
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.52
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.350
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.51 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.51 SUBAREA RUNOFF(CFS) = 1.52
EFFECTIVE AREA(ACRES) = 4.23 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.2 PEAK FLOW RATE(CFS) = 12.60
****************************************************************************
FLOW PROCESS FROM NODE 54.00 TO NODE 55.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.30 DOWNSTREAM(FEET) = 235.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00 CHANNEL SLOPE = 0.0050
CHANNEL FLOW THRU SUBAREA(CFS) = 12.60
FLOW VELOCITY(FEET/SEC) = 1.88 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 1.42 Tc(MIN.) = 10.95
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 55.00 = 890.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 10.95
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.096
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.18 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.18 SUBAREA RUNOFF(CFS) = 0.45
EFFECTIVE AREA(ACRES) = 4.41 AREA-AVERAGED Fm(INCH/HR) = 0.05
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13
TOTAL AREA(ACRES) = 4.4 PEAK FLOW RATE(CFS) = 12.60
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
Page 18
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PCPD25
MAINLINE Tc(MIN.) = 10.95
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.096
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.31 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.31 SUBAREA RUNOFF(CFS) = 0.85
EFFECTIVE AREA(ACRES) = 4.72 AREA-AVERAGED Fm(INCH/HR) = 0.05
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13
TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 12.93
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 26.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.50 DOWNSTREAM(FEET) = 234.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 255.00 CHANNEL SLOPE = 0.0055
CHANNEL FLOW THRU SUBAREA(CFS) = 12.93
FLOW VELOCITY(FEET/SEC) = 1.98 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 2.15 Tc(MIN.) = 13.09
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 26.00 = 1145.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 13.09
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.797
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.30 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.66
EFFECTIVE AREA(ACRES) = 5.02 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.17
TOTAL AREA(ACRES) = 5.0 PEAK FLOW RATE(CFS) = 12.93
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 1
----------------------------------------------------------------------------
>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<<
============================================================================
TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:
Page 19
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TIME OF CONCENTRATION(MIN.) = 13.09
RAINFALL INTENSITY(INCH/HR) = 2.80
AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40
AREA-AVERAGED Ap = 0.17
EFFECTIVE STREAM AREA(ACRES) = 5.02
TOTAL STREAM AREA(ACRES) = 5.02
PEAK FLOW RATE(CFS) AT CONFLUENCE = 12.93
** CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 35.16 11.26 3.046 0.40( 0.08) 0.21 12.5 20.00
1 35.25 14.09 2.683 0.40( 0.08) 0.20 14.4 30.00
1 35.10 14.29 2.662 0.40( 0.08) 0.20 14.5 50.00
1 32.58 16.40 2.463 0.40( 0.08) 0.19 14.6 40.00
2 12.93 13.09 2.797 0.40( 0.07) 0.17 5.0 50.00
RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO
CONFLUENCE FORMULA USED FOR 2 STREAMS.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 47.30 11.26 3.046 0.40( 0.08) 0.20 16.8 20.00
2 48.15 13.09 2.797 0.40( 0.08) 0.19 18.7 50.00
3 47.64 14.09 2.683 0.40( 0.08) 0.19 19.4 30.00
4 47.40 14.29 2.662 0.40( 0.08) 0.19 19.5 50.00
5 43.92 16.40 2.463 0.40( 0.08) 0.19 19.7 40.00
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 48.15 Tc(MIN.) = 13.09
EFFECTIVE AREA(ACRES) = 18.75 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 19.7
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 26.00 = 1690.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 27.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 234.10 DOWNSTREAM(FEET) = 233.20
FLOW LENGTH(FEET) = 55.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 17.4 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 9.85
GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 2
PIPE-FLOW(CFS) = 48.15
PIPE TRAVEL TIME(MIN.) = 0.09 Tc(MIN.) = 13.19
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 27.00 = 1745.00 FEET.
****************************************************************************
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FLOW PROCESS FROM NODE 27.00 TO NODE 27.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 13.19
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.786
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.51 0.40 0.850 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.51 SUBAREA RUNOFF(CFS) = 1.12
EFFECTIVE AREA(ACRES) = 19.26 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21
TOTAL AREA(ACRES) = 20.2 PEAK FLOW RATE(CFS) = 48.15
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 70.00 TO NODE 71.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 280.00
ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.937
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.472
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.69 0.40 0.100 32 8.94
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.13
TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 2.13
****************************************************************************
FLOW PROCESS FROM NODE 71.00 TO NODE 72.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.90 DOWNSTREAM ELEVATION(FEET) = 239.90
STREET LENGTH(FEET) = 200.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
Page 21
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SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.66
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.36
HALFSTREET FLOOD WIDTH(FEET) = 11.88
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.74
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.63
STREET FLOW TRAVEL TIME(MIN.) = 1.92 Tc(MIN.) = 10.86
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.110
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.38 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.38 SUBAREA RUNOFF(CFS) = 1.05
EFFECTIVE AREA(ACRES) = 1.07 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.1 PEAK FLOW RATE(CFS) = 2.96
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.37 HALFSTREET FLOOD WIDTH(FEET) = 12.37
FLOW VELOCITY(FEET/SEC.) = 1.79 DEPTH*VELOCITY(FT*FT/SEC.) = 0.67
LONGEST FLOWPATH FROM NODE 70.00 TO NODE 72.00 = 480.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 72.00 TO NODE 73.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.90 DOWNSTREAM ELEVATION(FEET) = 239.10
STREET LENGTH(FEET) = 175.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.34
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.39
HALFSTREET FLOOD WIDTH(FEET) = 13.25
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.78
Page 22
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PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.70
STREET FLOW TRAVEL TIME(MIN.) = 1.64 Tc(MIN.) = 12.49
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.873
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.30 0.40 0.100 32
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.76
EFFECTIVE AREA(ACRES) = 1.37 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.4 PEAK FLOW RATE(CFS) = 3.49
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.40 HALFSTREET FLOOD WIDTH(FEET) = 13.54
FLOW VELOCITY(FEET/SEC.) = 1.79 DEPTH*VELOCITY(FT*FT/SEC.) = 0.71
LONGEST FLOWPATH FROM NODE 70.00 TO NODE 73.00 = 655.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 74.00 TO NODE 75.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 230.00
ELEVATION DATA: UPSTREAM(FEET) = 242.10 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.657
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.790
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.64 0.40 0.100 32 7.66
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.16
TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 2.16
****************************************************************************
FLOW PROCESS FROM NODE 76.00 TO NODE 77.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 230.00
ELEVATION DATA: UPSTREAM(FEET) = 242.50 DOWNSTREAM(FEET) = 241.20
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.536
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.824
SUBAREA Tc AND LOSS RATE DATA(AMC II):
Page 23
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PCPD25
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.51 0.40 0.100 32 7.54
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.74
TOTAL AREA(ACRES) = 0.51 PEAK FLOW RATE(CFS) = 1.74
****************************************************************************
FLOW PROCESS FROM NODE 78.00 TO NODE 79.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00
ELEVATION DATA: UPSTREAM(FEET) = 242.50 DOWNSTREAM(FEET) = 240.50
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.357
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.211
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.12 0.40 0.100 32 6.36
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 4.20
TOTAL AREA(ACRES) = 1.12 PEAK FLOW RATE(CFS) = 4.20
****************************************************************************
FLOW PROCESS FROM NODE 80.00 TO NODE 81.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 160.00
ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.890
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.397
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.87 0.40 0.100 32 5.89
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 3.41
TOTAL AREA(ACRES) = 0.87 PEAK FLOW RATE(CFS) = 3.41
****************************************************************************
FLOW PROCESS FROM NODE 80.00 TO NODE 82.00 IS CODE = 21
----------------------------------------------------------------------------
Page 24
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PCPD25
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 150.00
ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 241.30
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.029
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.339
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.27 0.40 0.100 32 6.03
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.04
TOTAL AREA(ACRES) = 0.27 PEAK FLOW RATE(CFS) = 1.04
============================================================================
END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 0.3 TC(MIN.) = 6.03
EFFECTIVE AREA(ACRES) = 0.27 AREA-AVERAGED Fm(INCH/HR)= 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.100
PEAK FLOW RATE(CFS) = 1.04
============================================================================
============================================================================
END OF RATIONAL METHOD ANALYSIS
�
Page 25
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HYDROLOGY REPORT August 2017
Pacific Center City of Anaheim, CA
APPENDIX 3.2
100-Year Hydrology Study, Proposed Condition
Page 164
PCPD100
____________________________________________________________________________
****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE
(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)
(c) Copyright 1983-2014 Advanced Engineering Software (aes)
Ver. 21.0 Release Date: 06/01/2014 License ID 1355
Analysis prepared by:
Fuscoe Engineering
16795 Von Karman Ave
Suite 100
Irvine CA, 92606
************************** DESCRIPTION OF STUDY **************************
* PACIFIC CENTER - ANAHEIM *
* PROPOSED HYDROLOGY *
* 100 YEAR EVENT *
**************************************************************************
FILE NAME: PCPD100.DAT
TIME/DATE OF STUDY: 13:57 07/31/2017
============================================================================
USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
============================================================================
--*TIME-OF-CONCENTRATION MODEL*--
USER SPECIFIED STORM EVENT(YEAR) = 100.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90
*DATA BANK RAINFALL USED*
*ANTECEDENT MOISTURE CONDITION (AMC) III ASSUMED FOR RATIONAL METHOD*
*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL*
HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR
NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)
=== ===== ========= ================= ====== ===== ====== ===== =======
1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150
GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.50 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 5.0 (FT*FT/S)
*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN
OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*
*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED
****************************************************************************
FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
Page 1
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PCPD100
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 370.00
ELEVATION DATA: UPSTREAM(FEET) = 243.30 DOWNSTREAM(FEET) = 239.00
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.410
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.593
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
APARTMENTS A 0.89 0.40 0.200 52 8.41
PUBLIC PARK A 0.21 0.40 0.850 52 12.54
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.324
SUBAREA RUNOFF(CFS) = 4.42
TOTAL AREA(ACRES) = 1.10 PEAK FLOW RATE(CFS) = 4.42
****************************************************************************
FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 275.00
ELEVATION DATA: UPSTREAM(FEET) = 243.00 DOWNSTREAM(FEET) = 240.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.615
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.862
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
APARTMENTS A 0.58 0.40 0.200 52 7.61
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200
SUBAREA RUNOFF(CFS) = 2.50
TOTAL AREA(ACRES) = 0.58 PEAK FLOW RATE(CFS) = 2.50
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 7.61
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.862
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
Page 2
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PCPD100
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
APARTMENTS A 0.37 0.40 0.200 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200
SUBAREA AREA(ACRES) = 0.37 SUBAREA RUNOFF(CFS) = 1.59
EFFECTIVE AREA(ACRES) = 0.95 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 4.09
****************************************************************************
FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.10 DOWNSTREAM ELEVATION(FEET) = 238.80
STREET LENGTH(FEET) = 150.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 40.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.55
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.39
HALFSTREET FLOOD WIDTH(FEET) = 13.17
AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.45
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.96
STREET FLOW TRAVEL TIME(MIN.) = 1.02 Tc(MIN.) = 8.63
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.525
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
APARTMENTS A 0.23 0.40 0.200 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200
SUBAREA AREA(ACRES) = 0.23 SUBAREA RUNOFF(CFS) = 0.92
EFFECTIVE AREA(ACRES) = 1.18 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 4.72
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.39 HALFSTREET FLOOD WIDTH(FEET) = 13.39
FLOW VELOCITY(FEET/SEC.) = 2.47 DEPTH*VELOCITY(FT*FT/SEC.) = 0.97
LONGEST FLOWPATH FROM NODE 12.00 TO NODE 14.00 = 425.00 FEET.
****************************************************************************
Page 3
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PCPD100
FLOW PROCESS FROM NODE 14.00 TO NODE 11.10 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 238.80 DOWNSTREAM ELEVATION(FEET) = 238.50
STREET LENGTH(FEET) = 90.00 CURB HEIGHT(INCHES) = 8.0
STREET HALFWIDTH(FEET) = 84.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 30.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.74
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.48
HALFSTREET FLOOD WIDTH(FEET) = 15.99
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.73
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.82
STREET FLOW TRAVEL TIME(MIN.) = 0.87 Tc(MIN.) = 9.50
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.283
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.01 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.01 SUBAREA RUNOFF(CFS) = 0.04
EFFECTIVE AREA(ACRES) = 1.19 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 4.72
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.48 HALFSTREET FLOOD WIDTH(FEET) = 15.94
FLOW VELOCITY(FEET/SEC.) = 1.73 DEPTH*VELOCITY(FT*FT/SEC.) = 0.82
LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 11.10 TO NODE 11.10 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 4.72 9.50 4.283 0.40( 0.08) 0.20 1.2 12.00
Page 4
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LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 4.42 8.41 4.593 0.40( 0.13) 0.32 1.1 10.00
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 11.10 = 370.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 8.90 8.41 4.593 0.40( 0.11) 0.26 2.2 10.00
2 8.83 9.50 4.283 0.40( 0.10) 0.26 2.3 12.00
TOTAL AREA(ACRES) = 2.3
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 8.90 Tc(MIN.) = 8.410
EFFECTIVE AREA(ACRES) = 2.15 AREA-AVERAGED Fm(INCH/HR) = 0.11
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.26
TOTAL AREA(ACRES) = 2.3
LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 11.10 TO NODE 11.10 IS CODE = 12
----------------------------------------------------------------------------
>>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 20.00 TO NODE 21.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00
ELEVATION DATA: UPSTREAM(FEET) = 242.90 DOWNSTREAM(FEET) = 238.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.540
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.890
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
APARTMENTS A 0.86 0.40 0.200 52 7.54
PUBLIC PARK A 0.38 0.40 0.850 52 11.24
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.399
SUBAREA RUNOFF(CFS) = 5.28
TOTAL AREA(ACRES) = 1.24 PEAK FLOW RATE(CFS) = 5.28
****************************************************************************
FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 56
----------------------------------------------------------------------------
Page 5
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>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 238.10 DOWNSTREAM(FEET) = 237.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 150.00 CHANNEL SLOPE = 0.0040
GIVEN CHANNEL BASE(FEET) = 4.00 CHANNEL FREEBOARD(FEET) = 1.0
"Z" FACTOR = 0.000 MANNING'S FACTOR = 0.015
*ESTIMATED CHANNEL HEIGHT(FEET) = 1.46
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.625
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.20 0.40 0.100 52
PUBLIC PARK A 0.16 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.433
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.00
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.26
AVERAGE FLOW DEPTH(FEET) = 0.46 TRAVEL TIME(MIN.) = 0.77
Tc(MIN.) = 8.31
SUBAREA AREA(ACRES) = 0.36 SUBAREA RUNOFF(CFS) = 1.44
EFFECTIVE AREA(ACRES) = 1.60 AREA-AVERAGED Fm(INCH/HR) = 0.16
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.41
TOTAL AREA(ACRES) = 1.6 PEAK FLOW RATE(CFS) = 6.43
GIVEN CHANNEL BASE(FEET) = 4.00 CHANNEL FREEBOARD(FEET) = 1.0
"Z" FACTOR = 0.000 MANNING'S FACTOR = 0.015
*ESTIMATED CHANNEL HEIGHT(FEET) = 1.48
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.48 FLOW VELOCITY(FEET/SEC.) = 3.32
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 470.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 30.00 TO NODE 31.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 380.00
ELEVATION DATA: UPSTREAM(FEET) = 243.00 DOWNSTREAM(FEET) = 239.10
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.176
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.668
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
Page 6
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COMMERCIAL A 1.66 0.40 0.100 52 8.18
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 6.91
TOTAL AREA(ACRES) = 1.66 PEAK FLOW RATE(CFS) = 6.91
****************************************************************************
FLOW PROCESS FROM NODE 31.00 TO NODE 22.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.10
DOWNSTREAM NODE ELEVATION(FEET) = 237.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 360.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 1.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.925
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.91 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 10.25
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.08
AVERAGE FLOW DEPTH(FEET) = 0.39 FLOOD WIDTH(FEET) = 30.90
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 2.89 Tc(MIN.) = 11.07
SUBAREA AREA(ACRES) = 1.91 SUBAREA RUNOFF(CFS) = 6.68
EFFECTIVE AREA(ACRES) = 3.57 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 3.6 PEAK FLOW RATE(CFS) = 12.48
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.41 FLOOD WIDTH(FEET) = 33.33
FLOW VELOCITY(FEET/SEC.) = 2.18 DEPTH*VELOCITY(FT*FT/SEC) = 0.90
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 12.48 11.07 3.925 0.40( 0.04) 0.10 3.6 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.
** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
Page 7
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NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 6.43 8.31 4.625 0.40( 0.16) 0.41 1.6 20.00
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 470.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 17.49 8.31 4.625 0.40( 0.09) 0.21 4.3 20.00
2 17.90 11.07 3.925 0.40( 0.08) 0.19 5.2 30.00
TOTAL AREA(ACRES) = 5.2
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 17.90 Tc(MIN.) = 11.066
EFFECTIVE AREA(ACRES) = 5.17 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21
TOTAL AREA(ACRES) = 5.2
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 51
----------------------------------------------------------------------------
>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.80
CHANNEL LENGTH THRU SUBAREA(FEET) = 70.00 CHANNEL SLOPE = 0.0100
CHANNEL BASE(FEET) = 4.00 "Z" FACTOR = 0.000
MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.888
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.08 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 18.03
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 6.39
AVERAGE FLOW DEPTH(FEET) = 0.70 TRAVEL TIME(MIN.) = 0.18
Tc(MIN.) = 11.25
SUBAREA AREA(ACRES) = 0.08 SUBAREA RUNOFF(CFS) = 0.26
EFFECTIVE AREA(ACRES) = 5.25 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20
TOTAL AREA(ACRES) = 5.2 PEAK FLOW RATE(CFS) = 17.98
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.70 FLOW VELOCITY(FEET/SEC.) = 6.38
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 810.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<<
============================================================================
Page 8
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PCPD100
****************************************************************************
FLOW PROCESS FROM NODE 40.00 TO NODE 41.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 300.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.60
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.513
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.280
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.69 0.40 0.100 52 9.51
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.63
TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 2.63
****************************************************************************
FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.60 DOWNSTREAM ELEVATION(FEET) = 239.50
STREET LENGTH(FEET) = 300.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 40.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.28
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.40
HALFSTREET FLOOD WIDTH(FEET) = 13.75
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.63
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.66
STREET FLOW TRAVEL TIME(MIN.) = 3.06 Tc(MIN.) = 12.57
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.648
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.40 0.40 0.100 52
Page 9
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PCPD100
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.40 SUBAREA RUNOFF(CFS) = 1.30
EFFECTIVE AREA(ACRES) = 1.09 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.1 PEAK FLOW RATE(CFS) = 3.54
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.41 HALFSTREET FLOOD WIDTH(FEET) = 14.18
FLOW VELOCITY(FEET/SEC.) = 1.66 DEPTH*VELOCITY(FT*FT/SEC.) = 0.68
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 10
----------------------------------------------------------------------------
>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<
============================================================================
****************************************************************************
FLOW PROCESS FROM NODE 50.00 TO NODE 45.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.20
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.358
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.320
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.72 0.40 0.100 52 9.36
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 6.63
TOTAL AREA(ACRES) = 1.72 PEAK FLOW RATE(CFS) = 6.63
****************************************************************************
FLOW PROCESS FROM NODE 45.00 TO NODE 42.00 IS CODE = 91
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 240.20
DOWNSTREAM NODE ELEVATION(FEET) = 239.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.001
SUBAREA LOSS RATE DATA(AMC III):
Page 10
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DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.15 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 8.68
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.99
AVERAGE FLOW DEPTH(FEET) = 0.37 FLOOD WIDTH(FEET) = 28.97
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.34 Tc(MIN.) = 10.70
SUBAREA AREA(ACRES) = 1.15 SUBAREA RUNOFF(CFS) = 4.10
EFFECTIVE AREA(ACRES) = 2.87 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.9 PEAK FLOW RATE(CFS) = 10.23
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.39 FLOOD WIDTH(FEET) = 30.96
FLOW VELOCITY(FEET/SEC.) = 2.06 DEPTH*VELOCITY(FT*FT/SEC) = 0.80
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 42.00 = 490.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 10.23 10.70 4.001 0.40( 0.04) 0.10 2.9 50.00
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 42.00 = 490.00 FEET.
** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 3.54 12.57 3.648 0.40( 0.04) 0.10 1.1 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 13.54 10.70 4.001 0.40( 0.04) 0.10 3.8 50.00
2 12.86 12.57 3.648 0.40( 0.04) 0.10 4.0 40.00
TOTAL AREA(ACRES) = 4.0
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 13.54 Tc(MIN.) = 10.698
EFFECTIVE AREA(ACRES) = 3.80 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.0
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 42.00 TO NODE 43.00 IS CODE = 91
Page 11
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PCPD100
----------------------------------------------------------------------------
>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<
============================================================================
UPSTREAM NODE ELEVATION(FEET) = 239.50
DOWNSTREAM NODE ELEVATION(FEET) = 239.20
CHANNEL LENGTH THRU SUBAREA(FEET) = 50.00
"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080
PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150
PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000
MAXIMUM DEPTH(FEET) = 0.50
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.932
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.40 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 14.24
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.53
AVERAGE FLOW DEPTH(FEET) = 0.41 FLOOD WIDTH(FEET) = 33.09
"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.33 Tc(MIN.) = 11.03
SUBAREA AREA(ACRES) = 0.40 SUBAREA RUNOFF(CFS) = 1.40
EFFECTIVE AREA(ACRES) = 4.20 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.4 PEAK FLOW RATE(CFS) = 14.70
END OF SUBAREA "V" GUTTER HYDRAULICS:
DEPTH(FEET) = 0.42 FLOOD WIDTH(FEET) = 33.54
FLOW VELOCITY(FEET/SEC.) = 2.54 DEPTH*VELOCITY(FT*FT/SEC) = 1.05
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 43.00 = 650.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 43.00 TO NODE 23.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.20 DOWNSTREAM(FEET) = 236.80
FLOW LENGTH(FEET) = 450.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 18.72
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 14.70
PIPE TRAVEL TIME(MIN.) = 0.40 Tc(MIN.) = 11.43
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 11
----------------------------------------------------------------------------
>>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<<
============================================================================
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** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 14.70 11.43 3.853 0.40( 0.04) 0.10 4.2 50.00
2 13.94 13.33 3.528 0.40( 0.04) 0.10 4.4 40.00
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.
** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 17.57 8.49 4.568 0.40( 0.09) 0.23 4.4 20.00
2 17.98 11.25 3.888 0.40( 0.08) 0.20 5.2 30.00
LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 810.00 FEET.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 30.54 8.49 4.568 0.40( 0.07) 0.17 7.5 20.00
2 32.59 11.25 3.888 0.40( 0.06) 0.16 9.4 30.00
3 32.52 11.43 3.853 0.40( 0.06) 0.16 9.4 50.00
4 30.22 13.33 3.528 0.40( 0.06) 0.16 9.6 40.00
TOTAL AREA(ACRES) = 9.6
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 32.59 Tc(MIN.) = 11.248
EFFECTIVE AREA(ACRES) = 9.38 AREA-AVERAGED Fm(INCH/HR) = 0.06
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.16
TOTAL AREA(ACRES) = 9.6
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 23.00 TO NODE 24.00 IS CODE = 51
----------------------------------------------------------------------------
>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.80 DOWNSTREAM(FEET) = 235.80
CHANNEL LENGTH THRU SUBAREA(FEET) = 250.00 CHANNEL SLOPE = 0.0040
CHANNEL BASE(FEET) = 7.00 "Z" FACTOR = 0.000
MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.50
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.741
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
APARTMENTS A 2.78 0.40 0.200 52
PUBLIC PARK A 0.29 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.261
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 37.62
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.32
AVERAGE FLOW DEPTH(FEET) = 1.01 TRAVEL TIME(MIN.) = 0.78
Tc(MIN.) = 12.03
SUBAREA AREA(ACRES) = 3.07 SUBAREA RUNOFF(CFS) = 10.05
Page 13
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EFFECTIVE AREA(ACRES) = 12.45 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18
TOTAL AREA(ACRES) = 12.7 PEAK FLOW RATE(CFS) = 41.10
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.07 FLOW VELOCITY(FEET/SEC.) = 5.48
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 24.00 = 1350.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 24.00 TO NODE 25.00 IS CODE = 51
----------------------------------------------------------------------------
>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.80 DOWNSTREAM(FEET) = 235.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 135.00 CHANNEL SLOPE = 0.0052
CHANNEL BASE(FEET) = 7.00 "Z" FACTOR = 0.000
MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.676
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.15 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 41.32
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.98
AVERAGE FLOW DEPTH(FEET) = 0.99 TRAVEL TIME(MIN.) = 0.38
Tc(MIN.) = 12.41
SUBAREA AREA(ACRES) = 0.15 SUBAREA RUNOFF(CFS) = 0.45
EFFECTIVE AREA(ACRES) = 12.60 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 12.8 PEAK FLOW RATE(CFS) = 41.10
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.98 FLOW VELOCITY(FEET/SEC.) = 5.98
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 25.00 = 1485.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 25.00 TO NODE 25.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 12.41
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.676
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.53 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.53 SUBAREA RUNOFF(CFS) = 5.01
Page 14
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EFFECTIVE AREA(ACRES) = 14.13 AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18
TOTAL AREA(ACRES) = 14.4 PEAK FLOW RATE(CFS) = 45.82
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 45.84 9.66 4.243 0.40( 0.08) 0.19 12.2 20.00
2 45.82 12.41 3.676 0.40( 0.07) 0.18 14.1 30.00
3 45.65 12.59 3.645 0.40( 0.07) 0.18 14.2 50.00
4 42.48 14.52 3.359 0.40( 0.07) 0.18 14.4 40.00
NEW PEAK FLOW DATA ARE:
PEAK FLOW RATE(CFS) = 45.84 Tc(MIN.) = 9.66
AREA-AVERAGED Fm(INCH/HR) = 0.08 AREA-AVERAGED Fp(INCH/HR) = 0.40
AREA-AVERAGED Ap = 0.19 EFFECTIVE AREA(ACRES) = 12.23
****************************************************************************
FLOW PROCESS FROM NODE 25.00 TO NODE 26.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.10 DOWNSTREAM(FEET) = 234.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 205.00 CHANNEL SLOPE = 0.0049
CHANNEL FLOW THRU SUBAREA(CFS) = 45.84
FLOW VELOCITY(FEET/SEC) = 2.64 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 1.30 Tc(MIN.) = 10.95
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 26.00 = 1690.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 10.95
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.948
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.29 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.29 SUBAREA RUNOFF(CFS) = 0.94
EFFECTIVE AREA(ACRES) = 12.52 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21
TOTAL AREA(ACRES) = 14.6 PEAK FLOW RATE(CFS) = 45.84
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 1
----------------------------------------------------------------------------
>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
============================================================================
Page 15
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TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:
TIME OF CONCENTRATION(MIN.) = 10.95
RAINFALL INTENSITY(INCH/HR) = 3.95
AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40
AREA-AVERAGED Ap = 0.21
EFFECTIVE STREAM AREA(ACRES) = 12.52
TOTAL STREAM AREA(ACRES) = 14.65
PEAK FLOW RATE(CFS) AT CONFLUENCE = 45.84
****************************************************************************
FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 245.00
ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.50
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.248
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.644
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.88 0.40 0.100 52 8.25
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 3.65
TOTAL AREA(ACRES) = 0.88 PEAK FLOW RATE(CFS) = 3.65
****************************************************************************
FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 238.00 DOWNSTREAM(FEET) = 237.50
FLOW LENGTH(FEET) = 125.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 4.64
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 3.65
PIPE TRAVEL TIME(MIN.) = 0.45 Tc(MIN.) = 8.70
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 52.00 = 370.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 52.00 TO NODE 52.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
Page 16
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PCPD100
MAINLINE Tc(MIN.) = 8.70
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.506
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.21 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.21 SUBAREA RUNOFF(CFS) = 4.86
EFFECTIVE AREA(ACRES) = 2.09 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 2.1 PEAK FLOW RATE(CFS) = 8.40
****************************************************************************
FLOW PROCESS FROM NODE 52.00 TO NODE 53.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.30
FLOW LENGTH(FEET) = 330.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 10.69
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 8.40
PIPE TRAVEL TIME(MIN.) = 0.51 Tc(MIN.) = 9.21
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 53.00 = 700.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 53.00 TO NODE 53.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.21
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.360
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 1.63 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.63 SUBAREA RUNOFF(CFS) = 6.34
EFFECTIVE AREA(ACRES) = 3.72 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 3.7 PEAK FLOW RATE(CFS) = 14.46
****************************************************************************
FLOW PROCESS FROM NODE 53.00 TO NODE 54.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
Page 17
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PCPD100
ELEVATION DATA: UPSTREAM(FEET) = 236.50 DOWNSTREAM(FEET) = 236.30
FLOW LENGTH(FEET) = 30.00 MANNING'S N = 0.011
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 18.41
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1
PIPE-FLOW(CFS) = 14.46
PIPE TRAVEL TIME(MIN.) = 0.03 Tc(MIN.) = 9.24
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 54.00 = 730.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 54.00 TO NODE 54.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 9.24
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.352
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.51 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.51 SUBAREA RUNOFF(CFS) = 1.98
EFFECTIVE AREA(ACRES) = 4.23 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 4.2 PEAK FLOW RATE(CFS) = 16.42
****************************************************************************
FLOW PROCESS FROM NODE 54.00 TO NODE 55.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 236.30 DOWNSTREAM(FEET) = 235.50
CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00 CHANNEL SLOPE = 0.0050
CHANNEL FLOW THRU SUBAREA(CFS) = 16.42
FLOW VELOCITY(FEET/SEC) = 2.01 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 1.33 Tc(MIN.) = 10.57
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 55.00 = 890.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 10.57
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.030
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.18 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
Page 18
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PCPD100
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.18 SUBAREA RUNOFF(CFS) = 0.60
EFFECTIVE AREA(ACRES) = 4.41 AREA-AVERAGED Fm(INCH/HR) = 0.05
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13
TOTAL AREA(ACRES) = 4.4 PEAK FLOW RATE(CFS) = 16.42
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 10.57
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.030
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.31 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.31 SUBAREA RUNOFF(CFS) = 1.11
EFFECTIVE AREA(ACRES) = 4.72 AREA-AVERAGED Fm(INCH/HR) = 0.05
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13
TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 16.90
****************************************************************************
FLOW PROCESS FROM NODE 55.00 TO NODE 26.00 IS CODE = 52
----------------------------------------------------------------------------
>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 235.50 DOWNSTREAM(FEET) = 234.10
CHANNEL LENGTH THRU SUBAREA(FEET) = 255.00 CHANNEL SLOPE = 0.0055
CHANNEL FLOW THRU SUBAREA(CFS) = 16.90
FLOW VELOCITY(FEET/SEC) = 2.12 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)
TRAVEL TIME(MIN.) = 2.00 Tc(MIN.) = 12.57
LONGEST FLOWPATH FROM NODE 50.00 TO NODE 26.00 = 1145.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 12.57
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.649
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.30 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.89
EFFECTIVE AREA(ACRES) = 5.02 AREA-AVERAGED Fm(INCH/HR) = 0.07
Page 19
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PCPD100
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.17
TOTAL AREA(ACRES) = 5.0 PEAK FLOW RATE(CFS) = 16.90
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 1
----------------------------------------------------------------------------
>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<<
============================================================================
TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:
TIME OF CONCENTRATION(MIN.) = 12.57
RAINFALL INTENSITY(INCH/HR) = 3.65
AREA-AVERAGED Fm(INCH/HR) = 0.07
AREA-AVERAGED Fp(INCH/HR) = 0.40
AREA-AVERAGED Ap = 0.17
EFFECTIVE STREAM AREA(ACRES) = 5.02
TOTAL STREAM AREA(ACRES) = 5.02
PEAK FLOW RATE(CFS) AT CONFLUENCE = 16.90
** CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 45.84 10.95 3.948 0.40( 0.08) 0.21 12.5 20.00
1 45.82 13.70 3.472 0.40( 0.08) 0.20 14.4 30.00
1 45.65 13.89 3.446 0.40( 0.08) 0.20 14.5 50.00
1 42.48 15.84 3.195 0.40( 0.08) 0.19 14.6 40.00
2 16.90 12.57 3.649 0.40( 0.07) 0.17 5.0 50.00
RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO
CONFLUENCE FORMULA USED FOR 2 STREAMS.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 61.80 10.95 3.948 0.40( 0.08) 0.20 16.9 20.00
2 62.73 12.57 3.649 0.40( 0.08) 0.19 18.7 50.00
3 61.89 13.70 3.472 0.40( 0.08) 0.19 19.4 30.00
4 61.59 13.89 3.446 0.40( 0.08) 0.19 19.5 50.00
5 57.24 15.84 3.195 0.40( 0.08) 0.19 19.7 40.00
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 62.73 Tc(MIN.) = 12.57
EFFECTIVE AREA(ACRES) = 18.66 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19
TOTAL AREA(ACRES) = 19.7
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 26.00 = 1690.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 26.00 TO NODE 27.00 IS CODE = 41
----------------------------------------------------------------------------
>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
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>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<
============================================================================
ELEVATION DATA: UPSTREAM(FEET) = 234.10 DOWNSTREAM(FEET) = 233.20
FLOW LENGTH(FEET) = 55.00 MANNING'S N = 0.013
ASSUME FULL-FLOWING PIPELINE
PIPE-FLOW VELOCITY(FEET/SEC.) = 9.98
PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)
GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 2
PIPE-FLOW(CFS) = 62.73
PIPE TRAVEL TIME(MIN.) = 0.09 Tc(MIN.) = 12.66
LONGEST FLOWPATH FROM NODE 40.00 TO NODE 27.00 = 1745.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 27.00 TO NODE 27.00 IS CODE = 81
----------------------------------------------------------------------------
>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================
MAINLINE Tc(MIN.) = 12.66
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.633
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
PUBLIC PARK A 0.51 0.40 0.850 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850
SUBAREA AREA(ACRES) = 0.51 SUBAREA RUNOFF(CFS) = 1.51
EFFECTIVE AREA(ACRES) = 19.17 AREA-AVERAGED Fm(INCH/HR) = 0.08
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21
TOTAL AREA(ACRES) = 20.2 PEAK FLOW RATE(CFS) = 62.73
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
****************************************************************************
FLOW PROCESS FROM NODE 70.00 TO NODE 71.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 280.00
ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.937
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.436
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.69 0.40 0.100 52 8.94
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.73
TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 2.73
****************************************************************************
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FLOW PROCESS FROM NODE 71.00 TO NODE 72.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 240.90 DOWNSTREAM ELEVATION(FEET) = 239.90
STREET LENGTH(FEET) = 200.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00
INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.41
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.39
HALFSTREET FLOOD WIDTH(FEET) = 13.15
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.84
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.72
STREET FLOW TRAVEL TIME(MIN.) = 1.81 Tc(MIN.) = 10.75
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.991
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.38 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.38 SUBAREA RUNOFF(CFS) = 1.35
EFFECTIVE AREA(ACRES) = 1.07 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.1 PEAK FLOW RATE(CFS) = 3.81
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.40 HALFSTREET FLOOD WIDTH(FEET) = 13.74
FLOW VELOCITY(FEET/SEC.) = 1.90 DEPTH*VELOCITY(FT*FT/SEC.) = 0.76
LONGEST FLOWPATH FROM NODE 70.00 TO NODE 72.00 = 480.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 72.00 TO NODE 73.00 IS CODE = 61
----------------------------------------------------------------------------
>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>(STANDARD CURB SECTION USED)<<<<<
============================================================================
UPSTREAM ELEVATION(FEET) = 239.90 DOWNSTREAM ELEVATION(FEET) = 239.10
STREET LENGTH(FEET) = 175.00 CURB HEIGHT(INCHES) = 6.0
STREET HALFWIDTH(FEET) = 30.00
DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00
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INSIDE STREET CROSSFALL(DECIMAL) = 0.020
OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020
SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1
STREET PARKWAY CROSSFALL(DECIMAL) = 0.020
Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150
Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200
**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.30
STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:
STREET FLOW DEPTH(FEET) = 0.42
HALFSTREET FLOOD WIDTH(FEET) = 14.72
AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.88
PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.79
STREET FLOW TRAVEL TIME(MIN.) = 1.55 Tc(MIN.) = 12.30
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.695
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL A 0.30 0.40 0.100 52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.99
EFFECTIVE AREA(ACRES) = 1.37 AREA-AVERAGED Fm(INCH/HR) = 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10
TOTAL AREA(ACRES) = 1.4 PEAK FLOW RATE(CFS) = 4.51
END OF SUBAREA STREET FLOW HYDRAULICS:
DEPTH(FEET) = 0.42 HALFSTREET FLOOD WIDTH(FEET) = 14.91
FLOW VELOCITY(FEET/SEC.) = 1.92 DEPTH*VELOCITY(FT*FT/SEC.) = 0.82
LONGEST FLOWPATH FROM NODE 70.00 TO NODE 73.00 = 655.00 FEET.
****************************************************************************
FLOW PROCESS FROM NODE 74.00 TO NODE 75.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 230.00
ELEVATION DATA: UPSTREAM(FEET) = 242.10 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.657
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.847
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.64 0.40 0.100 52 7.66
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.77
TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 2.77
Page 23
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****************************************************************************
FLOW PROCESS FROM NODE 76.00 TO NODE 77.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 230.00
ELEVATION DATA: UPSTREAM(FEET) = 242.50 DOWNSTREAM(FEET) = 241.20
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.536
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.891
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.51 0.40 0.100 52 7.54
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 2.23
TOTAL AREA(ACRES) = 0.51 PEAK FLOW RATE(CFS) = 2.23
****************************************************************************
FLOW PROCESS FROM NODE 78.00 TO NODE 79.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00
ELEVATION DATA: UPSTREAM(FEET) = 242.50 DOWNSTREAM(FEET) = 240.50
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.357
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.392
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 1.12 0.40 0.100 52 6.36
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 5.39
TOTAL AREA(ACRES) = 1.12 PEAK FLOW RATE(CFS) = 5.39
****************************************************************************
FLOW PROCESS FROM NODE 80.00 TO NODE 81.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 160.00
ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 240.90
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.890
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* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.633
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.87 0.40 0.100 52 5.89
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 4.38
TOTAL AREA(ACRES) = 0.87 PEAK FLOW RATE(CFS) = 4.38
****************************************************************************
FLOW PROCESS FROM NODE 80.00 TO NODE 82.00 IS CODE = 21
----------------------------------------------------------------------------
>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<
============================================================================
INITIAL SUBAREA FLOW-LENGTH(FEET) = 150.00
ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 241.30
Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.029
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.558
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
COMMERCIAL A 0.27 0.40 0.100 52 6.03
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA RUNOFF(CFS) = 1.34
TOTAL AREA(ACRES) = 0.27 PEAK FLOW RATE(CFS) = 1.34
============================================================================
END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 0.3 TC(MIN.) = 6.03
EFFECTIVE AREA(ACRES) = 0.27 AREA-AVERAGED Fm(INCH/HR)= 0.04
AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.100
PEAK FLOW RATE(CFS) = 1.34
============================================================================
============================================================================
END OF RATIONAL METHOD ANALYSIS
�
Page 25
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HYDROLOGY REPORT August 2017
Pacific Center City of Anaheim, CA
APPENDIX 4
Soils Map Excerpt
Page 191
HYDROLOGY REPORT August 2017
Pacific Center City of Anaheim, CA
APPENDIX 5
Hydrology Maps Existing and Proposed Condition – In Pocket
Page 194
HYDROLOGY REPORT August 2017
Pacific Center City of Anaheim, CA
APPENDIX 6
FEMA Map
Page 195
Lamar Stewart
Text Box
SITE
Page 196
HYDROLOGY REPORT August 2017
Pacific Center City of Anaheim, CA
APPENDIX 7
Basin Impact Analysis