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FIXING THE DELTA
Urban Water Institute ConferenceAugust 22, 2012
Southern California and the Delta
One of two primary imported sources Colorado River Delta
About 30 percent on average comes from Delta
Wet years in Northern California key Replenishing reservoirs Surviving drought cycles
Delta Water
Source: Governor’s Delta Vision Report (Estimated total annual runoff 32.85 maf)
Pacific Ocean48%
UpstreamConsumptive
Use31%
Delta Exports17%
In-Delta Consumptive
Use4%
3
Sacramento River
11
San Joaquin River22
Sac River /West Delta
33
4
SWP Pumps
CVP Pumps
Exiting Delta Conveyance
Seismic/Subsidence Water supplies must
move past Delta islands that are now below sea level and are dry only because of levees
Levee failures could result in: Submerged islands Rush of sea water
westward Jeopardize water
supplies
Subsidence
Delta Habitat Background 95 percent original
habitat erased by levees 95 percent of current
species population Non-native
Declining native species Food production
Favors non-native species Flows alone can’t solve
problem
BDCP State/Federal Joint Proposal
More reliable water supply North Delta Diversion Facilities
9,000 cfs Twin gravity flow tunnels (35
miles) Habitat Restoration
Goal of up to 113,000 acres Other Stressors
Toxic pollutants Invasive species Predator control Illegal poaching Hatchery practices
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Benefits of the proposal
Improved water quality Protection from seismic
events Physically separates water
supply transportation from flow patterns in estuary
More flexible water system to reduce conflicts with migrating fish species Currently restricts water
supply deliveries
Comprehensive Solution includes Habitat Restoration Floodplain habitat
Salmon Tidal wetlands
Smelt Other species
Improves food production and shelter
Concurrent reduction in other stressors All responsible parties
Ecosystem Restoration
Restoration & Preservation Targets
New Floodplain Up to 10,000 ac
Tidal Habitat Up to 65,000 ac
Channel Margin 20 Levee Miles
Riparian Up to 5,000 ac
Grassland Up to 10,000 ac
Other (Vernal Pool, Nontidal Marsh and Alkali Seasonal Wetland)
Up to 13,000 ac
TOTAL 113,000 ac
Delta Conveyance
Existing Export Facilities Maintained in South Delta
New Tunnels Constructed for Diversion at Sacramento River
Restores Natural Flow Direction Within Delta
Secure Diversion Source if Delta Levees Fail
Cost and Impacts on rates
Delta Conveyance Cost estimated as $13 Billion
Approx $1 per person per month for MWD Service Area
Benefits Analysis Identified Significant Benefits Water Supply -- $3-8 Billion Water Quality – $1.5-1.8 Billion Seismic Risk Reduction – $1.5-8.2 Billion Reduced Regulatory Risk – $11.6 Billion Recreation/Public Benefit – $13-55 Billion
Costs for Public Benefits State and federal/
public funds over 50 years
2014 water bond possible source of funds for habitat
BDCP not dependent on passage of water bond
Commitment to Conservation
2009 legislation Improve water use
efficiency Statewide reduction
Urban per-capita water use 20% by 2020
Efficient water management plans for large-scale agriculture
BDCP Next Steps
Release of draft EIS/EIR in Fall 2012
Revised final EIS/EIR 2013
Record of Decision/Project Permits 2013
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