Transcript Transition Plan

San Gabriel Valley’s Water Supply
A Plan for the Future
San Gabriel Valley
Water Forum
August 28, 2012
Southern California’s water supply… we are
dependent on a very large system beyond our
control
Sierra Mtns
LA Aqueduct
Delta
State
Water
Project
Local
Supplies
Groundwater
and Recycling
Colorado
River
Aqueduct
Supplies
Conservation
The Colorado River
Lake Mead
Sacramento-San Joaquin Bay Delta…difficult
and expensive to fix but absolutely necessary
Sac River
Sacramento
Stockton
SWP Pumps
CVP Pumps
4
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…
Reliance on
imported
water will be
33%
By 2035
Today
Firm GW & Surface Water
New Stormwater Capture
Potential MWD Shortage
Recycled Water
Water Transfers & Storage
Conservation
MWD Water
Single Family Monthly Water Rate
Dollars per month for
15 hundred cubic feet (HCF)
$80
$70
$60
San Gabriel Valley
San Diego County
$50
$40
$30
$20
$10
$0
2003
2005
2007
2009
2011
1 HCF = 100 cubic feet = 748 gallons of water
15 HCF: average monthly water consumption for single family residential
8
Cost of Groundwater Replenishment
(imported water dollars per acre-foot)
$800
$700
$600
$500
$400
$300
Drought in the Colorado River
Basin and in California , along
with regulatory restriction on
pumping in the Bay Delta
contributed to a 188 %
increase in the cost of
replenishing groundwater
with imported water
$686
$238
$200
$100
$0
2007 Untreated Replenishment
2012 Tier 2 Untreated
What is an Integrated Resources Plan?
… a balanced portfolio of reliable
water supplies taking into account,
cost, risk, water quality, the
environment, climate change and
stakeholder input.
Demand and Supply in 2035 … under a repeat
of 2009 drought with no investments
250,000
225,000
200,000
Shortage
33,000 AF (15%)
Acre-Feet
175,000
Expected to occur
1 in 10 years
150,000
125,000
Allocated MWD Firm Supply
100,000
Existing Recycled Water
75,000
Surface Water (dry year)
50,000
Groundwater w/o
replenishment
25,000
0
Demands
Existing Supplies
Integrated Resources Plan Objectives
Provide Reliable Water Supply
Accounts 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 Environment
Accounts for receiving water quality (e.g., TMDLs) and
greenhouse gas emissions
Reduce Risk of Implementation
Accounts for regulatory issues and public
acceptance/participation, and flexibility once built
Stakeholder Objective Weights
80
70
Average Weight
Objective Weight (%)
60
50
40
30
32
20
20
19
14
10
8
8
0
Reliability
CostEffectiveness
Local Control
Water Quality
IRP Objectives
Environment Implementation
How do the different water supply options
compare?
Benefits
Option Category
Drought
Proof
Climate
Change
Basin
WQ
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
20x2020
Goal
Flexible
TMDL
Benefits
Comparing Status Quo with Preferred
Alternative Supply Portfolio in 2035
Reliance
on MWD
Water is
17%
Reliance
on MWD
Water is
33%
Status Quo
Firm GW & Surface Water
New Stormwater Capture
Potential MWD Shortage
Preferred Alternative
Recycled Water
Water Transfers & Storage
Conservation
MWD Water
The Future is about balancing risk factors and
opportunities …we have many opportunities.
Risk Factors
Opportunities
Climate 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
Questions
Shane Chapman
General Manager
Upper District
[email protected]