City of San Jose Storm Sewer Master Plan - Innovyze Jose_Final.pdf · City of San Jose Storm Sewer Master Plan Anne Symonds, PE and Mira Chokshi, PE 2016 Pacific Water Conference

City of San Jose Storm Sewer Master Plan

Anne Symonds, PE and Mira Chokshi, PE

2016 Pacific Water Conference

AWWA Hawaii Section | HWEA | February 4, 2016

2 City of San Jose Citywide Storm Master Plan | 2016 Pacific Water Conference | AWWA Hawaii Section | HWEA

Agenda

• Introduction and Goals of the Project

• Background on the City of San Jose

• Modeling Platform

• Model Development

- Model Development Assignments

- Rain and Flow Monitoring

- Riverine Integration

- Calibration and Verification

• Development of a LOS and CIP

- Existing, Near Term and Future

• Progress and Next Steps


Introductions of Project Team

• AECOM Team:

- Anne Symonds, PM

- David Wood, PIC

- Mira Chokshi, Lead Modeler

- Sharon Tsay and Dominique Brocard, QC

• City of San Jose Team:

- Casey Hirasaki, PM

- Shelley Guo, PIC

- Rotating staff of modelers


Key Goals of the Project

• Provide Knowledge Transfer

- Split Modeling Work with City of San Jose

- Provide Training

- Provide Overall QC

• Use InfoWorks ICM to provide integrated pipe

network and riverine model with 2D capability

• Provide City with Completed Master Plan

including CIP by June 2017 (AECOM selected

in 2013)


Background on the City of San Jose

• Total area: 176.5 Square Miles

• 2010 Population: 952,562

• 1,150 miles of Storm Sewer Pipeline

• 1,500 Storm Outfalls

• Discharges to Guadalupe River and

Coyote Creek

• 80% of system constructed between

1950 and 1979

• Designed to various criteria

• Riverine System Managed by Santa

Clara Valley Water District


Modeling Platform – InfoWorks ICM

• ICM – Integrated Catchment Modeling

• Fully-dynamic state of the art

hydrologic and hydraulic (H&H) model

• Key Features:

- Import HEC-RAS channel

geometry

- Enables surface flow routing using

two-dimensional (2D) modeling

- Uses multi-core processors and

graphics processing units (GPU)

for parallel computer

- Allows multiple modelers to work

on the same model network

simultaneously


H&H Model Development Overview

• Supported rainfall and flow

data collection

• Imported pipes>=24” and

manholes from City GIS

• All major creeks and open

channels

• Developed documentation

for training City staff

• Documentation serves as

ongoing record of work

• Provided weekly informal

training Training Memo #2 Excerpt


Rainfall and Flow Monitoring

• Originally scheduled for Two

seasons, third added

• City contracted directly with

ADS

• Data reviewed and assessed

• First season calibration

completed,

• Second season calibration

underway

• Third season data collection

underway (El Nino


Spatial Variability in Observed Rainfall


Gage adjusted radar rainfall (GARR) data


Flow Monitoring Data – Quality Check

• City/AECOM team

reviewed flow data right

after storm to identify any

site issues (backwater,

failure of sensors)

• Provided feedback to ADS

to address flow meter

sensor issues

• Process improved data

quality and provided high

quality data for calibration


H&H Model Development – 24 inch and Larger Pipes

1,100 miles of storm sewer pipes

- 540 miles of storm sewer pipes

(>=24”) in H&H model

- 13,000 storm sewer manholes

- 36 Large Storage Basins

- 29 Major Pump Stations

- 180 Flap valves at Outfalls (out of

1100 Outfalls)

- 6,500 subcatchments



H&H Model Development - Used Parcel Types to

Estimate % Impervious DCIA_LU % DCIA % NDCIA

Rural Housing 11 8

Single Family>1acre 11 8

Single Family>0.23acre 15 12





Single Family<=0.06acre 35 0

Townhomes 50 10

Condominiums 68 0

Industrial 80 0

Apartments 89 0

Commercial 90 0

Mobile Home Park 17 37

Schools 35 0

Mixed Use 60 10

Water 0 0

Open Space 2 0

Parks and Fields 5 0

Freeways 90 10


H&H Model Development - Riverine Model Integration

• Gathered Creek Models from

SCVWD

• Various ages and format of

riverine models (1970-2012)

• Established most efficient way to

develop the riverine models

• When available used:

- HEC-RAS/2 model

- Geo-referenced HEC-2

- ICM to develop based on

LIDAR


H&H Model Calibration and Verification

Hydrograph and Scatter graph for Flow meter GUA_08



Hydrograph and Scatter graph for Flow meter GUA_22



Bird Pump Station Wet Well Level Verification


Model Verification for Surface Flooding

Model Results

Color Depth

2 - 6”

> 6”

http://www.mercurynews.com/portlet/article/html/imageDisplay.jsp?contentItemRelationshipId=6478430


Other Supporting Work

• Coordination with City on LID

incorporation

• Development of Land Use

Layers for Existing, Near

Term and Future Conditions

(using City’s 2040 General

Plan)

• Development of Design

Storms

• Review of Bay and River

Levels including Climate

Change Impacts


Next Steps Include:

• Having a complete calibrated model

• Establishing preliminary LOS goals

• Assessing existing, near term and future

system performance

• Setting LOS goals with stakeholders

• Developing list of system deficiencies

• Developing alternative projects to

resolve deficiencies

• Analyzing the system to develop the

most efficient CIP recommendations

• Environmental Review

Thank You

[email protected]

[email protected]

mailto:[email protected]

mailto:[email protected]


Integrated Offer

• Architecture

• Interior Design

Architecture

• Building Structures

• Communications + IT

• Mechanical, Electrical + Plumbing

• Systems Integration

• Security

• Landscape Architecture

• Master Planning + Urban Design

• Environmental + Ecological Planning

• Strategic Planning

• Economic Planning +

Real Estate

• Entertainment +

Leisure Feasibility

• Hotels + Resorts Feasibility

• Capital Facilities Planning

• Economic Development Consulting

• Renewable Energy

• Bio-energy

• Energy Efficiency + Carbon

Management

• Smart Power Distribution

• Hydropower

• Thermal Power

• Wind Power

Building Engineering Design + Planning Economics Energy

• Air Quality

• Impact Assessment + Permitting

• Environmental Health + Safety

Management

• Environmental Remediation

• Site Restoration

• Waste + Solid Waste Services

Environment

• Program Management

• Logistics Operation + Maintenance

• International Development

• Safety Management + Contracting

• Procurement Strategies

• Program Control Systems

• Risk Management

• Change + Dispute Control/Mitigation

• Cost Control + Estimating

• Web-based Project Management

Systems

• Quality Management

• Funding + Financial Solutions

• Economic Planning +

Real Estate

• Entertainment +

Leisure Feasibility

• Hotels + Resorts Feasibility

• Capital Facilities Planning

• Economic Development Consulting

• Floodplain services

• Stormwater Treatment + Disposal

• Wastewater systems

• Water quality planning

• Water resources engineering

• Water program management

• Water systems development

• Wet weather mitigation

Government Services Program + Construction Management

Transportation Water

Our services: what we do


Vision, Purpose and Core Values Our purpose: who we are

We are driven by a common purpose — to positively impact lives,

transform communities and make the world a better place.

City of San Jose

Storm Sewer Master Plan

2016 Pacific Water Conference AWWA Hawaii Section | HWEA | February 2, 2016

City of San Jose Storm Sewer Master Plan - Innovyze Jose_Final.pdf · City of San Jose Storm Sewer Master Plan Anne Symonds, PE and Mira Chokshi, PE 2016 Pacific Water Conference

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