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Water
A brief overview of our water today
               2010
            Bob Rogers
Where Does Water Come From?
         San Diego imports 80% to 90% of its
         water
 San Diego’s imported water supply comes from Northern
  California and the Colorado River Basin.
 A small percentage of the supply is from local sources:
    Groundwater & Reservoirs- 10%
    Recycling - 3%
    San Diego’s Average Rainfall is less than 10” per year.
    California’s Average Rainfall is greater than 17”
Imported Water: State Water
                 Project
 Water from Northern
  California is brought to us by
  the California Aqueduct.
 The California Aqueduct is
  444 miles-long and carries
  the water through the San
  Joaquin Valley to Southern
  California.
 In addition to the California
  Aqueduct, the SWP consists
  of:
    Approximately 22 dams
      and reservoirs
                                   California Aqueduct
    1 Delta pumping plant
State Water Project: Customers
 The SWP provides irrigation water to farms in the San Joaquin
  Valley, and is a major supplier for
    Los Angeles County
    Riverside County
    San Bernardino County
    San Diego County
    Other parts of Southern California
        Cities in Napa and Solano counties through the North Bay
         Aqueduct
        Santa Barbara and San Luis Obispo counties through the Coastal
         Aqueduct
        Alameda and Santa Clara counties through the South Bay
         Aqueduct.
Imported Water: Colorado River
Colorado River

 In addition to California, the
  Colorado River is a water
  source for Colorado, Utah,
  Wyoming, New Mexico,
  Nevada, and Arizona
 Water allotments are also
  given to Indian Reservations
  and Mexico
Colorado River Aqueduct

 Consists of:
    2 reservoirs
    5 pumping plants
    63 miles of canals
    92 miles of tunnels
    84 miles of buried
     conduit and siphons
 Has a capacity of 1.3 million
  acre-feet per year
Water Distribution

 Metropolitan Water District (MWD) imports water from
  Northern California and the Colorado River and serves 19
  million people in 6 counties.

 Metropolitan Water District Sells to SDCWA
       SDCWA Sells to SDC Member Agencies - Padre, Carlsbad,
  Rincon, etc. (25 total members) – 3 million residents
               SDCMA Distributes to general population
The water that we purchase is a blend of Colorado & SWA
Water Distribution
 Water is transferred to the
  San Diego treatment plants
  at Miramar, Alvarado and
  Otay reservoirs, via pipelines
  operated by San Diego
   County Water Authority.
Colorado River-Decreasing Water
             Supply
 California takes approximately 5.2 million acre feet/year from
  the Colorado River, though we are only allotted 4.4 maf/year.
 We’ve been able to take more than our allotment for a number
  of years, because other states were not using their entire
  allocation.

 Growing demand in other areas has resulted in other states
  using more of their allocation.
Environmental Limitation: State
Water Project
 Large pumps near the
  Sacramento River Delta,
  which send water down the
  State of California, have
  been identified as causing
  harm to a tiny fish, the Delta
  Smelt.
 Levees very fragile
 Decline in native species
 Water quality issues
 2/3 of this water goes to
  SoCA.
Where does it go
 The average household uses between 45% to 50% of their water for
  outdoor use.
 Examples:
    Hosing off hardscapes
    Children playing with the hose or water toys
    Washing your car without a bucket or trigger nozzle
    Landscape Irrigation
Going, Going…….
The Future
The End ?
Resources



  www.calwater.ca.gov
    www.sdcwa.org
www.20gallonchallenge.com
 www.californiadelta.org

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Water20100pptx

  • 1. Water A brief overview of our water today 2010 Bob Rogers
  • 2. Where Does Water Come From? San Diego imports 80% to 90% of its water  San Diego’s imported water supply comes from Northern California and the Colorado River Basin.  A small percentage of the supply is from local sources:  Groundwater & Reservoirs- 10%  Recycling - 3%  San Diego’s Average Rainfall is less than 10” per year.  California’s Average Rainfall is greater than 17”
  • 3. Imported Water: State Water Project  Water from Northern California is brought to us by the California Aqueduct.  The California Aqueduct is 444 miles-long and carries the water through the San Joaquin Valley to Southern California.  In addition to the California Aqueduct, the SWP consists of:  Approximately 22 dams and reservoirs California Aqueduct  1 Delta pumping plant
  • 4. State Water Project: Customers  The SWP provides irrigation water to farms in the San Joaquin Valley, and is a major supplier for  Los Angeles County  Riverside County  San Bernardino County  San Diego County  Other parts of Southern California  Cities in Napa and Solano counties through the North Bay Aqueduct  Santa Barbara and San Luis Obispo counties through the Coastal Aqueduct  Alameda and Santa Clara counties through the South Bay Aqueduct.
  • 6. Colorado River  In addition to California, the Colorado River is a water source for Colorado, Utah, Wyoming, New Mexico, Nevada, and Arizona  Water allotments are also given to Indian Reservations and Mexico
  • 7. Colorado River Aqueduct  Consists of:  2 reservoirs  5 pumping plants  63 miles of canals  92 miles of tunnels  84 miles of buried conduit and siphons  Has a capacity of 1.3 million acre-feet per year
  • 8. Water Distribution  Metropolitan Water District (MWD) imports water from Northern California and the Colorado River and serves 19 million people in 6 counties.  Metropolitan Water District Sells to SDCWA SDCWA Sells to SDC Member Agencies - Padre, Carlsbad, Rincon, etc. (25 total members) – 3 million residents SDCMA Distributes to general population The water that we purchase is a blend of Colorado & SWA
  • 9. Water Distribution  Water is transferred to the San Diego treatment plants at Miramar, Alvarado and Otay reservoirs, via pipelines operated by San Diego County Water Authority.
  • 10. Colorado River-Decreasing Water Supply  California takes approximately 5.2 million acre feet/year from the Colorado River, though we are only allotted 4.4 maf/year.  We’ve been able to take more than our allotment for a number of years, because other states were not using their entire allocation.  Growing demand in other areas has resulted in other states using more of their allocation.
  • 11. Environmental Limitation: State Water Project  Large pumps near the Sacramento River Delta, which send water down the State of California, have been identified as causing harm to a tiny fish, the Delta Smelt.  Levees very fragile  Decline in native species  Water quality issues  2/3 of this water goes to SoCA.
  • 12. Where does it go  The average household uses between 45% to 50% of their water for outdoor use.  Examples:  Hosing off hardscapes  Children playing with the hose or water toys  Washing your car without a bucket or trigger nozzle  Landscape Irrigation
  • 16. Resources www.calwater.ca.gov www.sdcwa.org www.20gallonchallenge.com www.californiadelta.org