david pettijohn
TRANSCRIPT
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LA’s Water Reliability 2025 Securing a high quality, sustainable local water supply
September 26, 2013
LA’s Water Reliability 2025One Water Leadership Summit
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LADWP’s Long, Rich and Proactive Water History Helped Transform the City of LA
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LA’s Reliance on MWD Water Has Increased 7-Fold in the Past 30 Years
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Using Less Water Than 40 Years Ago Despite Population Increase of 1 Million
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New Challenges Require Continued Proactive Planning by LADWP
Local Groundwater Contamination& Basin Urbanization
Threats to Imported Water
- Environmental- Competing Demands- Climate Change
Rising MWD Water Costs
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LA’s Water Reliability 2025 is Combination of Two Important LADWP Initiatives
+ =
SFB GroundwaterRemediation Program
Ensuring safe drinking water that meets all regulations
Local Water Supply Program
Securing new local water supplies
LA’s WaterReliability 2025
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Centralized Stormwater Capture Projects
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Distributed Stormwater Capture Projects
Elmer Avenue Retrofit
Before After
Cistern
Rain Barrel
Rain Garden
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Stormwater Capture Master Plan
• Evaluate existing stormwater capture facilities and projects
• Quantify maximum stormwater capture potential
• Provide potential strategies to increase stormwater capture
• Recommend stormwater capture projects, programs, policies, and incentives
• Determine the economic mix of centralized vs distributed stormwater capture projects
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Relationship of Stormwater Capture Master Plan to Other Efforts
StormwaterCapture
Master Plan
Detailed Master Plans & Studies
Identifies solutions and estimates costs, and are conducted
as needed
Urban Water Management Plan
Required by law every 5 years, and must take a 25-year look into the
future
Input Input
LA’s Water Reliability 2025
Summarizes all water initiatives and develops
overall timing and impacts, and will be updated every year
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LA’s Water Reliability 2025 will Reduce Dependency on Imported Water Supplies
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Summary of Local Water Supplies and Cost
Program
Component
Total Capital Costs (Billions, 2012
Dollars)Water Yield
(Acre-Feet/Yr)
StormwaterCapture
Centralized Recharge $0.34 54,788
Distributed Harvesting $0.26 8,159
Water Conservation $0.43 55,016
ReuseGroundwater Replenishment $0.42 30,000
Non-Potable Reuse $0.26 15,219
Total $1.7 163,182
SFB Groundwater Remediation Program $0.6 - $0.992,000
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Summary of Benefits from Overall Program
Improved Reliability During Droughts, Regulatory
Restrictions and Climate Change
Net Present Value Benefit of over $2 Billion for Local Water Supply
Improved Water Quality of Groundwater & Receiving
Waters
Increased Local Societal Benefits, such as Job
Creation, More Green Space