HomeMy WebLinkAbout4/6/2011 - STAFF REPORTS - 00 (2) Palm Springs City Council
Whitewater Groundwater
Replenishment
CVWD i DWA
March r
17ESER7+WATER
Purpose of the Project
Recharge up to 400,000 acre-feet
per year to reduce Upper
Whitewater River Subbasin
groundwater overdraft
Groundwater
■Aquifer(Ak-wuh-fer)-a geologic formation
containing groundwater
■ Unconfined&Confined Aquifer
Whitewater River Subbasin-30 million acre-feet
capacity and currently contains 25 million acre-feet
■ Percolation Rate-2 to 3 feet per day
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Recharge
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History
*1963-CVWD$c DWA Become SWP Contractors But No
Direct Connection To SWP
*CVWD-23,100acre•feet/year(AFY)
* DWA-38,1oo AFY
*1967-1983.2oo3-CVWD,DWA&MWD Execute Exchange
Agreements
*1984-CVWD,DWA&MWD-Advanced Delivery Agreement
*2cno-Total SWP Table A Amount=194,100 AFY
*CVWD•138,35oAFY
* DWA•55r75o AFY
Recharge
*SWP Reliability&Allocation
*Current SWP Reliability-W(was 77%)
*Current Allocation-607(wet weather)
*Upper Whitewater River Subbasin Status
* 2,371,583 AF recharged since 1973
*796,138 AF of cumulative overdraft
* 2009-57,024 AF recharged
n 2010-228,330 AF recharged
Recharge Facilities
* Facility Capacity
*7oo cubic feet per second(cfs)or 1,390 AFD or 452
million gallons per day
* MWD Turnout-4 outlets into Whitewater River Just North
of 1-10
a: z-Diversion Channels&z Diversion Structures
Recharge Basins
* i9 Basins-70z acres-15 acres to 58 acres
* Percol2te-2-3feet per day
Turn-outWhitewater
Recharge Facility
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Recharge
From
10,000 feet
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USGS Gaining Station-Post Storm-'lo
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Monitoring Well Results
Thanks : .
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