California’s Water Future - Congresswoman Grace Napolitano › sites › napolitano.house... ·...
Transcript of California’s Water Future - Congresswoman Grace Napolitano › sites › napolitano.house... ·...
California’s Water Future:
Groundwater Management & Storage
August 31, 2017
Central Basin
West Coast
Basin
420 square miles
Population = 4 million
(over 10% of California’s population)
43 cities
Groundwater provides half
of the water supply
Spreading Grounds (percolation basins)
Alamitos
Seawater
Barrier
Dominguez Gap
Seawater Barrier
West Coast
Seawater Barrier
Collection of projects to eliminate WRD demand
for imported water
• Capture and conserve additional stormwater
• Increase use of recycled water for groundwater
replenishment
Creates locally sustainable groundwater supply
Spreading Grounds (percolation basins)
Rio HondoSpreading Grounds
San Gabriel River Spreading Grounds
L.A. County Replenishment Facilities
What is GRIP?
21,000 AFRecycled Water
Status Quo
21,000 AFImported Water
50,000 AFRecycled Water
(tertiary)
54,000 AFStormwater Capture
50,000 AFRecycled Water
(tertiary)
54,000 AFStormwater Capture
12
5,0
00
AF
tota
l wat
er
What is GRIP?
Status Quo10,000 AF
Adv. Treated Recycled Water
11,000 AFAdd’l. Tertiary Recycled Water
21,000 AFImported Water
50,000 AFRecycled Water
(tertiary)
54,000 AFStormwater Capture
50,000 AFRecycled Water
(tertiary)
54,000 AFStormwater Capture
What is the Cost of GRIP?
Status Quo
$1,200 per AF
$375 per AF$770 per AF $768
per AF
50,000 AFRecycled Water
(tertiary)
54,000 AFStormwater Capture
50,000 AFRecycled Water
(tertiary)
54,000 AFStormwater Capture
GRIP site
(about 1 mile upstream)
San Gabriel Coasting
Spreading Grounds
1 mile
Downstream
Neighborhood across
street
Held Community Design Forum
GRIP will cost $107 million
WRD will receive over $20 million in grants and also
$80 million in a low-interest, long-term loan financing
through Prop 1
• IRWMP
• SWRCB
• RMC
Grant funding and Prop 1 SRF loan will save WRD $46
million over 30 years
GRIP Construction Progress to Date
(view from southwest corner)
Where to go from here - WIN 4 ALL
• There is 450,000 AF of unused storage space in the
Central and West Coast groundwater basins
• Much effort was put into improving the adjudications
to access that space
• Can use same approach as WIN - use local
resources and storage to increase use of
groundwater supplies and offset overall demand for
imported water
Thank You
Robb Whitaker, General Manager