BCWWAAnnual Conference

2013

CAPTURE, REDUCE AND REUSE

INTEGRATED WATER SYSTEMS MASTERPLANNING FOR A NEW COMMUNITY

Glen Shkurhan, P.Eng.April 2013

Presentation Goals

Describe unique integrated water systemsScenario’s and “What If’s?”Approach to analysis and assessmentPerformance variabilityAdaptive management

“Harmony”; guiding principles

“The provision of high quality water andwastewater services through responsible,sustainable, and innovative stewardship ofresources”.

“Smart Growth – effective use of resources”.

Water System Goals

CAPTURE

REDUCEREUSE

WESTEAST

STAGE 1

SCENARIOS

• System Configuration, or Functional Condition• Time, or Stage of Development• Climatic Conditions

SCENARIOS

WHAT IF’S?

Water

Raw / Reclaimed

Sewer

Rainwater

PRECIPITATION VARIABILITY

1:100 wet 585 mm

1:100 dry 270 mm

Average 405 mm

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PARAMETER PARAMETER VALUE FOR INDICATED SCENARIO

DEMAND CONDITION: AVERAGE HIGH LOW LOW HIGHUNITS

RAINFALL CONDITION: AVERAGE DRY WET DRY WET

Unit ADD, Residential 225 275 175 175 275 L/cap/dayUnit Irrigation Rate - Residential / ICI (1) (1) (1) (1) (1) See noteIrrigated Lot Area Ratio (SF) 0.30 0.60 0.10 0.10 0.60 ha/haIrrigation Period - Potable/Raw Water 151 151 110 110 151 daysIrrigation Period - Treated Effluent 129 148 110 148 110 daysPopulation Density, Residential – SF 3.1 3.1 2.9 2.9 3.1 capita/DUPopulation Density, Residential – MF 2.8 2.8 2.6 2.6 2.8 capita/DUImpervious Ratio – SF 0.38 0.30 0.50 0.50 0.30 ha/haRDII R-Factor 0.02 0.01 0.03 0.01 0.03

GWI Unit Rate 0.011 0.011 0.011 0.007 0.015 L/s/ha

Precipitation (rain+snow) – Annual 0.412 0.270 0.584 0.270 0.584 mEvaporation – Annual 0.7 0.8 0.7 0.8 0.7 m

Seepage Loss From Lake/Ponds – Annual 0.200 0.300 0.100 0.300 0.100 m

DEMAND VARIABILITY

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ANALYTICAL APPROACH

1. MASS BALANCE (Excel, MS)2. WATER DISTRIBUTION (WaterCAD, Bentley)3. SANITARY COLLECTION (MOUSE, DHI)4. HYDROLOGY (MIKE SHE, DHI)5. NPS POLLUTANT LOADING (Excel, MS)

6. GROUNDWATER7. LAKE

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WATER’S DISTRIBUTION – STAGE 1

WATER’S DISTRIBUTION – ULT.

Max Operating Level = 1181.7 (Overflow Pumps “ON”)

Minimum Water Level = 1181.5 (Bow Pumps “ON”)

Normal Water Level = 1181.4 (Bow Pumps “OFF”)

Maximum Water Level = 1183.1

Wave Action Free Board = 0.9 m

Min Ground = 1184.0

100 Year Runoff Storage = 1.4 m2.8 m

Normal Operating Range = 0.2 m

Storage = 0.3 m

LAKE LEVEL PERFORMANCE

GOLF COURSE INUNDATION

NPS POLLUTANT LOADS

Modular

Conservative

Pilot

IMPLEMENTATION

ADAPTIVE MANAGEMENT

CLIMATEPrecipitationTemperature

EFFECTIVENESSMetered flows at key points in system

COMPLIANCEImplementationOperationsDevelopment

VALIDATIONLake LevelsWater QualityBow River DemandOverflow

Model Calibration

Update Predictions

Corrections

Science ?

Design ?

Implementation ?

Operation ?

Demands & ConsumptionAdjust User RatesDownscaling Future PhasesSupply to External Market

WWTP & StorageExpand or Defer Plant / StorageOffsite Disposal – Effluent / SolidsAdjust Effluent Irrigation

WTPAdjust User RatesExpand or Defer Plant / StorageEmergency Lake Bypass

Lake & PondsAdjust Operational ProtocolsIncrease Pre-treatmentModified Discharge

CLOSING TAKEAWAYS

• Define Goals and Objectives• Identify Opportunities and Constraints• System Configuration and Interactions• Scenario’s and What If’s?• Analytical Approach and Tools• Variability, Risks, and Uncertainties• Implementation Strategy• Adaptive Management and Action Plan

Thank You