capture, reduse and reuse - integrated master planning a new community
TRANSCRIPT
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”.
SCENARIOS
• System Configuration, or Functional Condition• Time, or Stage of Development• Climatic Conditions
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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
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
CLIMATEPrecipitationTemperature
EFFECTIVENESSMetered flows at key points in system
COMPLIANCEImplementationOperationsDevelopment
VALIDATIONLake LevelsWater QualityBow River DemandOverflow
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