BCWWA 2013 Annual Conference Water Conservation and Sustainability Series presented by Glen Shkurhan of Urban Systems

1. BCWWA
Annual Conference
2013
CAPTURE, REDUCE AND REUSE
INTEGRATED WATER SYSTEMS MASTER
PLANNING FOR A NEW COMMUNITY
Glen Shkurhan, P.Eng.
April 2013

2. Presentation Goals
Describe unique integrated water systems
Scenario’s and “What If’s?”
Approach to analysis and assessment
Performance variability
Adaptive management

3. “Harmony”; guiding principles
“The provision of high quality water and
wastewater services through responsible,
sustainable, and innovative stewardship of
resources”.
“Smart Growth – effective use of resources”.

4. Water System Goals
CAPTURE
REDUCEREUSE

9. WEST
EAST

10. STAGE 1

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

13. SCENARIOS

14. WHAT IF’S?

15. Water
Raw / Reclaimed
Sewer
Rainwater

16. PRECIPITATION VARIABILITY
1:100 wet 585 mm
1:100 dry 270 mm
Average 405 mm

17. 17
PARAMETER PARAMETER VALUE FOR INDICATED SCENARIO
DEMAND CONDITION: AVERAGE HIGH LOW LOW HIGH
UNITS
RAINFALL CONDITION: AVERAGE DRY WET DRY WET
Unit ADD, Residential 225 275 175 175 275 L/cap/day
Unit Irrigation Rate - Residential / ICI (1) (1) (1) (1) (1) See note
Irrigated Lot Area Ratio (SF) 0.30 0.60 0.10 0.10 0.60 ha/ha
Irrigation Period - Potable/Raw Water 151 151 110 110 151 days
Irrigation Period - Treated Effluent 129 148 110 148 110 days
Population Density, Residential – SF 3.1 3.1 2.9 2.9 3.1 capita/DU
Population Density, Residential – MF 2.8 2.8 2.6 2.6 2.8 capita/DU
Impervious Ratio – SF 0.38 0.30 0.50 0.50 0.30 ha/ha
RDII 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 m
Evaporation – 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

18. 18
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. GROUNDWATER
7. LAKE

19. 19
WATER’S DISTRIBUTION – STAGE 1

20. WATER’S DISTRIBUTION – ULT.

21. 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

22. GOLF COURSE INUNDATION

23. NPS POLLUTANT LOADS

24. Modular
Conservative
Pilot
IMPLEMENTATION

25. ADAPTIVE MANAGEMENT

26. CLIMATE
Precipitation
Temperature
EFFECTIVENESS
Metered flows at key points in system
COMPLIANCE
Implementation
Operations
Development
VALIDATION
Lake Levels
Water Quality
Bow River Demand
Overflow

27. Model Calibration
Update Predictions
Corrections

28. Science ?
Design ?
Implementation ?
Operation ?

29. Demands & Consumption
Adjust User Rates
Downscaling Future Phases
Supply to External Market
WWTP & Storage
Expand or Defer Plant / Storage
Offsite Disposal – Effluent / Solids
Adjust Effluent Irrigation

30. WTP
Adjust User Rates
Expand or Defer Plant / Storage
Emergency Lake Bypass
Lake & Ponds
Adjust Operational Protocols
Increase Pre-treatment
Modified Discharge

31. 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

32. Thank You