Aspire Consulting Engineers Wastewater Flow Check Job Number: 1635 Client: Site Details: 1. Use Waikato Regional Infrastructure Technical Specifications 2. Flow Rates from WRC Regional Infrastrucutre Technical Spec. 5.2.4.2 Peaking factors as per table 5-2. Population equivalent as per table 5-3. Domestic Average Daily Flow (ADF) 200 L/p/day Infiltration allowance 2250 L/Ha/day Surface water ingress 16500 L/Ha/day Peaking factors: Residential with population of 600 3.2 Commercial with population of 60 5.5 Commercial with population of 100 4.8 Residential with population of 60 6.3 3. Calculate peak daily flow (PDF) and peak wet weather flow (PWWF) for catchment Existing catchment Existing Urban 0 0 0 0 0.0 Furture Urban 0 0 0 0 0.0 Commercial 22780 0 68.34 18.7935 0.9293924 1.4 Population equivalent from table 5.3 Business Zone - 30 persons per hectacre TOTAL 22780 18.7935 0.9293924 1.4 Proposed catchment - Existing Commercial 22780 0 68.34 18.7935 0.929 1.4 Population equivalent from table 5.3 Business Zone - 30 persons per hectacre Proposed Residential 176240 232 626.4 164.934 5.099 8.5 Proposed Accommodation 8770 100 beds 60 13.97325 0.898 1.1 Peaking factor used is based on the residential peaking factor Proposed Commercial 23540 105.93 26.4825 1.238 1.7 TOTAL 231330 232 860.67 224.18325 8.164 12.6 *** add 20% contingency to PWWF Note: assumed 100 bed motel, road reserves are included in the areas 15.10 Catchment plan: PWWF (L/sec) Zone WFT Finance and Investment Company Limited Paeroa Racecourse CATCHMENT POPULATION (assumes 30 persons/hectacre) ADF (m3/day) PDF (L/sec) NO OF DWELLINGS CATCHMENT (m²) PDF (L/sec) PWWF (L/sec) Zone CATCHMENT (m²) NO OF DWELLINGS CATCHMENT POPULATION (assumes 2.7 persons/dwelling) ADF (m3/day) ASPIRE Consulting Engineers Limited Ph: 09 426 6552
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Aspire Consulting Engineers
Wastewater Flow Check
Job Number: 1635
Client:
Site Details:
1. Use Waikato Regional Infrastructure Technical Specifications
2. Flow Rates from WRC Regional Infrastrucutre Technical Spec. 5.2.4.2
Peaking factors as per table 5-2. Population equivalent as per table 5-3.
Domestic Average Daily Flow (ADF) 200 L/p/day
Infiltration allowance 2250 L/Ha/day
Surface water ingress 16500 L/Ha/day
Peaking factors:
Residential with population of 600 3.2
Commercial with population of 60 5.5
Commercial with population of 100 4.8
Residential with population of 60 6.3
3. Calculate peak daily flow (PDF) and peak wet weather flow (PWWF) for catchment
Existing catchment
Existing Urban 0 0 0 0 0.0
Furture Urban 0 0 0 0 0.0
Commercial 22780 0 68.34 18.7935 0.9293924 1.4 Population equivalent from table 5.3 Business Zone - 30 persons per hectacre
TOTAL 22780 18.7935 0.9293924 1.4
Proposed catchment -
Existing Commercial 22780 0 68.34 18.7935 0.929 1.4 Population equivalent from table 5.3 Business Zone - 30 persons per hectacre
Proposed Residential 176240 232 626.4 164.934 5.099 8.5
Proposed Accommodation 8770 100 beds 60 13.97325 0.898 1.1 Peaking factor used is based on the residential peaking factor
Proposed Commercial 23540 105.93 26.4825 1.238 1.7
TOTAL 231330 232 860.67 224.18325 8.164 12.6 *** add 20% contingency to PWWF
Note: assumed 100 bed motel, road reserves are included in the areas 15.10
Catchment plan:
PWWF
(L/sec)Zone
WFT Finance and Investment Company Limited
Paeroa Racecourse
CATCHMENT
POPULATION (assumes
30 persons/hectacre)
ADF
(m3/day)PDF (L/sec)
NO OF
DWELLINGS CATCHMENT (m²)
PDF (L/sec)PWWF
(L/sec)Zone CATCHMENT (m²)
NO OF
DWELLINGS
CATCHMENT
POPULATION (assumes
2.7 persons/dwelling)
ADF
(m3/day)
ASPIRE Consulting Engineers Limited
Ph: 09 426 6552
Existing Wastewater Pipe Check - Pt A
Job Number: 1635
Client:
Site Details:
Domestic Average Daily Flow (ADF) 200 L/p/day
Infiltration allowance 2250 L/Ha/day
Surface water ingress 16500 L/Ha/day
Proposed catchment
Existing Residential 62 167.4 33.48 1.24 1.2
Future Urban 27000 34 91.125 24300 0.7453125 1.3
Commercial 0 0 0 0 0.0
TOTAL 27000 95.75 258.525 24333.48 1.9853125 2.5
Post Development Flow Volume (Refer to above and Sheet 1)
2.50 l/s
PIPE CAPACITY FORMULA (Full Flow)Colebrook-White V=-2(2gDS)log(ks/3.7D+2.51u/(D(2gDS))
u= 1.141 x106 kinematic viscosity of fluid
(water at 15 degrees)
ks= 1.5 mm (effective roughness)
D= diameter
S= hydraulic gradient
R= d/4 (circ. pipes)
Q= VA
Pipe Pipe Pipe PIPE
Grade Dia D Vel'y CAP'Y
S(%) (m) (m/s) (l/s)
1.00 150 0.88 15.5
Slope unknown
Therefore pipe has adequate capacity to cater for development depending on pipe gradient
WFT Finance and Investment Company Limited
Paeroa Racecourse
QPWWF =
Zone
CATCHMENT POPULATION
(assumes 2.7
persons/dwelling)
ADF
(m3/day)PDF (L/sec)
PWWF
(L/sec)
Capacity Check on Existing 150mm dia Earthenware Pipe
CATCHMENT (m²)
NO OF
DWELLIN
GS
Pt A
1635 WW flowsASPIRE Consulting Engineers Limited
Ph: 09 426 6552
Existing Wastewater Pipe Check - Pt B
Job Number: 1635
Client:
Site Details:
Exisiting upstream flowDomestic Average Daily Flow (ADF) 200 L/p/day
Infiltration allowance 2250 L/Ha/day
Surface water ingress 16500 L/Ha/day
Proposed catchment
Existing Residential 20980 23 62.1 17.1405 0.5146354 0.9
Racecourse Flow 0 0 0 0 0 12.6
Commercial 0 0 0 0 0.0
TOTAL 20980 23 62.1 17.1405 0.5146354 13.5
Post Development Flow Volume (Refer to above and Sheet 1)
13.52 l/s
PIPE CAPACITY FORMULA (Full Flow)Colebrook-White V=-2(2gDS)log(ks/3.7D+2.51u/(D(2gDS))
u= 1.141 x106 kinematic viscosity of fluid
(water at 15 degrees)
ks= 1.5 mm (effective roughness)
D= diameter
S= hydraulic gradient
R= d/4 (circ. pipes)
Q= VA
Pipe Pipe Pipe PIPE
Grade Dia D Vel'y CAP'Y
S(%) (m) (m/s) (l/s)
1.00 150 0.88 15.5
Slope unknown
WFT Finance and Investment Company Limited
Paeroa Racecourse
QPWWF =
Capacity Check on Existing 150uPVC Pipe
Therefore pipe has adequate capacity to cater for development depending on pipe gradient
Zone CATCHMENT (m²)
NO OF
DWELLIN
GS
CATCHMENT POPULATION
(assumes 2.7
persons/dwelling)
ADF
(m3/day)PDF (L/sec)
PWWF
(L/sec)
Pt B
1635 WW flowsASPIRE Consulting Engineers Limited
Ph: 09 426 6552
Existing Wastewater Pipe Check - Pt C
Job Number: 1635
Client:
Site Details:
Exisiting upstream flowDomestic Average Daily Flow (ADF) 200 L/p/day
Infiltration allowance 2250 L/Ha/day
Surface water ingress 16500 L/Ha/day
Proposed catchment
Existing Residential 52400 72 194.4 50.67 1.5764583 2.6
Future Residential 56000 70 189 50.4 1.5458333 2.6 *assumed 600m2 residential lots and deducted 25% for roading and reserves
Commercial 0 0 0 0 0.0
TOTAL 108400 142 383.4 101.07 3.1222917 5.2
Post Development Flow Volume (Refer to above and Sheet 1)
5.19 l/s
PIPE CAPACITY FORMULA (Full Flow)Colebrook-White V=-2(2gDS)log(ks/3.7D+2.51u/(D(2gDS))
u= 1.141 x106 kinematic viscosity of fluid
(water at 15 degrees)
ks= 1.5 mm (effective roughness)
D= diameter
S= hydraulic gradient
R= d/4 (circ. pipes)
Q= VA
Pipe Pipe Pipe PIPE
Grade Dia D Vel'y CAP'Y
S(%) (m) (m/s) (l/s)
1.00 150 0.88 15.5
Slope unknown
WFT Finance and Investment Company Limited
Paeroa Racecourse
Capacity Check on Existing 150uPVC Pipe
Therefore pipe has adequate capacity to cater for development depending on pipe gradient
Zone CATCHMENT (m²)
NO OF
DWELLIN
GS
CATCHMENT POPULATION
(assumes 2.7
persons/dwelling)
ADF
(m3/day)PDF (L/sec)
PWWF
(L/sec)
QPWWF =
Pt C
1635 WW flowsASPIRE Consulting Engineers Limited
Ph: 09 426 6552
*assumed 600m2 residential lots and deducted 25% for roading and reserves
1635 WW flowsASPIRE Consulting Engineers Limited
Ph: 09 426 6552
Existing Wastewater Pipe Check - Pt D
Job Number: 1635
Client:
Site Details:
Exisiting upstream flowDomestic Average Daily Flow (ADF) 200 L/p/day
Infiltration allowance 2250 L/Ha/day
Surface water ingress 16500 L/Ha/day
Proposed catchment
Existing residential 90800 38 102.6 40.95 0.9964583 2.7
Outlet B flow 0 0 0 0 13.5 *assumed 600m2 residential lots and deducted 25% for roading and reserves
Outlet C flow 0 0 0 0 5.2
TOTAL 90800 38 102.6 40.95 0.9964583 21.4
Post Development Flow Volume (Refer to above and Sheet 1)
21.44 l/s
PIPE CAPACITY FORMULA (Full Flow)Colebrook-White V=-2(2gDS)log(ks/3.7D+2.51u/(D(2gDS))
u= 1.141 x106 kinematic viscosity of fluid
(water at 15 degrees)
ks= 1.5 mm (effective roughness)
D= diameter
S= hydraulic gradient
R= d/4 (circ. pipes)
Q= VA
Pipe Pipe Pipe PIPE
Grade Dia D Vel'y CAP'Y
S(%) (m) (m/s) (l/s)
1.00 225 1.15 45.6
Slope unknown
QPWWF =
Capacity Check on Existing 150uPVC Pipe
Therefore pipe has adequate capacity to cater for development depending on pipe gradient
WFT Finance and Investment Company Limited
Paeroa Racecourse
PWWF
(L/sec)Zone CATCHMENT (m²)
NO OF
DWELLIN
GS
CATCHMENT POPULATION
(assumes 2.7
persons/dwelling)
ADF
(m3/day)PDF (L/sec)
Pt D
1635 WW flowsASPIRE Consulting Engineers Limited
Ph: 09 426 6552
*assumed 600m2 residential lots and deducted 25% for roading and reserves
1635 WW flowsASPIRE Consulting Engineers Limited
Ph: 09 426 6552
Existing Wastewater Pipe Check - Pt E
Job Number: 1635
Client:
Site Details:
Exisiting upstream flowDomestic Average Daily Flow (ADF) 200 L/p/day
Infiltration allowance 2250 L/Ha/day
Surface water ingress 16500 L/Ha/day
Proposed catchment
Outlet A 164030 147 396.9 116.28675 3.3671615 2.5
Outlet D 108475 136 366.103125 97.6275 2.994362 21.4 *assumed 600m2 residential lots and deducted 25% for roading and reserves
Commercial 0 0 0 0 0.0
TOTAL 272505 282.5938 763.003125 213.91425 6.3615234 23.9
Post Development Flow Volume (Refer to above and Sheet 1)
23.94 l/s
PIPE CAPACITY FORMULA (Full Flow)Colebrook-White V=-2(2gDS)log(ks/3.7D+2.51u/(D(2gDS))
u= 1.141 x106 kinematic viscosity of fluid
(water at 15 degrees)
ks= 1.5 mm (effective roughness)
D= diameter
S= hydraulic gradient
R= d/4 (circ. pipes)
Q= VA
Pipe Pipe Pipe PIPE
Grade Dia D Vel'y CAP'Y
S(%) (m) (m/s) (l/s)
1.00 225 1.15 45.6
Slope unknown
WFT Finance and Investment Company Limited
Paeroa Racecourse
Capacity Check on Existing 150uPVC Pipe
Therefore pipe has adequate capacity to cater for development depending on pipe gradient
Zone CATCHMENT (m²)
NO OF
DWELLIN
GS
CATCHMENT POPULATION
(assumes 2.7
persons/dwelling)
ADF
(m3/day)PDF (L/sec)
PWWF
(L/sec)
QPWWF =
Pt E
1635 WW flowsASPIRE Consulting Engineers Limited
Ph: 09 426 6552
*assumed 600m2 residential lots and deducted 25% for roading and reserves
1635 WW flowsASPIRE Consulting Engineers Limited
Ph: 09 426 6552
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