San Gabriel Valley Water Forum August 28, 2012 San Gabriel Valley’s Water Supply A Plan for the...
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San Gabriel Valley Water Forum August 28, 2012 San Gabriel Valley’s Water Supply A Plan for the Future
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Transcript of San Gabriel Valley Water Forum August 28, 2012 San Gabriel Valley’s Water Supply A Plan for the...
San Gabriel Valley Water Forum
August 28, 2012
San Gabriel Valley’s Water SupplyA Plan for the Future
Delta
LA Aqueduct
Colorado River
Aqueduct Supplies
State Water
Project Supplies
Sierra Mtns
Local Groundwater and Recycling
Conservation
Southern California’s water supply… we are dependent on a very large system beyond our control
Lake Mead
The Colorado River
4
SacramentoSacramento
SJ River
SJ RiverSWP PumpsSWP Pumps
CVP PumpsCVP Pumps
Sac RiverSac River
StocktonStockton
Sacramento-San Joaquin Bay Delta…difficult and expensive to fix but absolutely necessary
Our greatest resource…the Upper Area of the San Gabriel River Watershed
Recent trends in the health of the groundwater supply we depend upon…
Our water supply in the year 2035 if we do nothing more…
Firm GW & Surface Water Recycled Water ConservationNew Stormwater Capture Water Transfers & Storage MWD WaterPotential MWD Shortage
Reliance on imported water will be33%
Today
By 2035
8
Single Family Monthly Water Rate
1 HCF = 100 cubic feet = 748 gallons of water15 HCF: average monthly water consumption for single family residential
2003 2005 2007 2009 2011$0
$10
$20
$30
$40
$50
$60
$70
$80
San Gabriel ValleySan Diego County
Dol
lars
per
mon
th fo
r 15
hun
dred
cub
ic fe
et (H
CF)
Cost of Groundwater Replenishment (imported water dollars per acre-foot)
2007 Untreated Replenishment 2012 Tier 2 Untreated $0
$100
$200
$300
$400
$500
$600
$700
$800
$238
$686Drought in the Colorado River Basin and in California , along with regulatory restriction on pumping in the Bay Deltacontributed to a 188 % increase in the cost of replenishing groundwater with imported water
… a balanced portfolio of reliable water supplies taking into account, cost, risk, water quality, the environment, climate change and stakeholder input.
What is an Integrated Resources Plan?
0
25,000
50,000
75,000
100,000
125,000
150,000
175,000
200,000
225,000
250,000
Demands Existing Supplies
Acre
-Fee
t
Allocated MWD Firm Supply
Existing Recycled Water
Surface Water (dry year)
Groundwater w/o replenishment
Shortage33,000 AF (15%)
Expected to occur1 in 10 years
Demand and Supply in 2035 … under a repeat of 2009 drought with no investments
Provide Reliable Water SupplyAccounts for droughts, climate change and restrictions in Delta exports due to environmental regulations
Develop Cost-Effective Solutions Accounts for all life-cycle costs, capital and O&M
Increase Local Control of Supply Accounts for dependence on imported water
Meet Water Quality Regulations & Achieve Basin Goals
Accounts for both drinking water regulations and groundwater basin goals
Improve Natural EnvironmentAccounts for receiving water quality (e.g., TMDLs) and greenhouse gas emissions
Reduce Risk of ImplementationAccounts for regulatory issues and public acceptance/participation, and flexibility once built
Integrated Resources Plan Objectives
32
20 1914
8 80
10
20
30
40
50
60
70
80
Reliability Cost-Effectiveness
Local Control Water Quality Environment Implementation
Obj
ecti
ve W
eigh
t (%
)
IRP Objectives
Average Weight
Stakeholder Objective Weights
Option Category
BenefitsDrought
ProofClimateChange
BasinWQ
20x2020Goal Flexible
TMDLBenefits
Indirect Potable Reuse
Non-Potable Recycled
Centralized Stormwater
Decentralized Stormwater
Water Transfers/GW Storage
MWD Imported Water
New Water Conservation
– Strong benefit – Moderate benefit – Little to no benefit
How do the different water supply options compare?
Comparing Status Quo with Preferred Alternative Supply Portfolio in 2035
Firm GW & Surface Water Recycled Water ConservationNew Stormwater Capture Water Transfers & Storage MWD WaterPotential MWD Shortage
Reliance on MWD Water is33%
Reliance on MWD Water is17%
Status Quo Preferred Alternative
The Future is about balancing risk factors and opportunities …we have many opportunities.
Risk Factors OpportunitiesClimate Change Invest in Water Supply
Reliability –stormwater capture, recycling and conservation
Bay Delta Water Transfers, Storage, recycling, conservation and stormwater capture
Increasingly Stringent Drinking Water Quality Standards
Sound Science and investments in water treatment technology
Rising Cost of Energy Water Conservation and stormwater capture
