Welcomes
The Importance of Groundwater in Southern Los Angeles County
What is Groundwater? Water Table (groundwater) Underground (soil)
Acre Foot – a LOT of Water! <ul><li>An acre foot is about 326,000 gallons. </li></ul><ul><li>It’s the amount of water used...
4 Million People Area = 420 mi 2 > 400 Water Wells Pumping 250,000 acre feet  (77 BILLION Gallons) per Year Local Groundwa...
Groundwater provides of total water demand In our region… 40%
1900s-1950s OVERDRAFT <ul><li>Plunging Water Levels </li></ul><ul><li>Loss of Groundwater Supply </li></ul><ul><li>Wells g...
How WRD Manages the Groundwater Basins Replenishment of groundwater Groundwater Clean Up Basin monitoring Basin modeling
Pacific  Ocean Orange County Surface Recharge Coastal Injection West Coast  Basin Central  Basin Whittier Los Angeles Long...
San Gabriel  spreading grounds Rio Hondo spreading grounds
Forebay (unconfined aquifers) Surface Recharge Spreading Basin Bedrock (Pico Formation) Ocean Surface Recharge of Groundwa...
Results of WRD basin management Rising water levels & drought protection
Groundwater Monitoring Nearly 300 monitoring wells at 41 locations (more wells planned)
Nested Monitoring Wells Sampling Drilling
ANNUAL GROUNDWATER QUALITY TESTING Over 100 Chemicals Monitored
Two Annual Reports to Describe Basins
Benefits of Groundwater <ul><li>Local reliable supply </li></ul><ul><li>Drought protection </li></ul><ul><li>Cost effectiv...
Historical Cost of Groundwater compared to Imported Water (cost per Acre Foot) Slide
Breakdown of Replenishment Assessment Projects, Programs, Monitoring, Planning, Administration, etc. Cost of Water
Spreading Water Costs in Central Basin
<ul><li>MWD increases have averaged more than 8% per year over the past 50 years </li></ul><ul><li>CBMWD surcharge increas...
<ul><li>Collection of projects to eliminate WRD demand for imported water </li></ul><ul><li>Projects to: </li></ul><ul><ul...
WRD’s WIN Program will reduce or eliminate need for imported water to replenish groundwater
For more information visit www.wrd.org
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WRD - The Importance of Groundwater in Southern Los Angeles County

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  • WRD Groundwater Tours September 21, 2002
  • WRD - The Importance of Groundwater in Southern Los Angeles County

    1. 1. Welcomes
    2. 2. The Importance of Groundwater in Southern Los Angeles County
    3. 3. What is Groundwater? Water Table (groundwater) Underground (soil)
    4. 4. Acre Foot – a LOT of Water! <ul><li>An acre foot is about 326,000 gallons. </li></ul><ul><li>It’s the amount of water used by two average families in a year. </li></ul><ul><li>Equals the amount needed to fill a football field 1 foot deep in water. </li></ul>
    5. 5. 4 Million People Area = 420 mi 2 > 400 Water Wells Pumping 250,000 acre feet (77 BILLION Gallons) per Year Local Groundwater Supply Central Groundwater Basin and the West Coast Groundwater Basin 43 Cities Over 10% of California’s population San Gabriel Valley Coyote Hills Palos Verdes Hills Puente Hills Merced Hills Santa Monica Mtns Long Beach San Gabriel River Los Angeles River Los Angeles San Gabriel Mtns Pacific Ocean Newport-Inglewood Uplift Newport-Inglewood Uplift West Coast Basin Central Basin
    6. 6. Groundwater provides of total water demand In our region… 40%
    7. 7. 1900s-1950s OVERDRAFT <ul><li>Plunging Water Levels </li></ul><ul><li>Loss of Groundwater Supply </li></ul><ul><li>Wells going Dry </li></ul><ul><li>Seawater Intrusion </li></ul>
    8. 8. How WRD Manages the Groundwater Basins Replenishment of groundwater Groundwater Clean Up Basin monitoring Basin modeling
    9. 9. Pacific Ocean Orange County Surface Recharge Coastal Injection West Coast Basin Central Basin Whittier Los Angeles Long Beach Torrance Inglewood 5 miles 5 km
    10. 10. San Gabriel spreading grounds Rio Hondo spreading grounds
    11. 11. Forebay (unconfined aquifers) Surface Recharge Spreading Basin Bedrock (Pico Formation) Ocean Surface Recharge of Groundwater Pressure Area (confined aquifers) Clay (aquitard) Clay (aquitard) Clay (aquitard) Aquifer Aquifer Aquifer
    12. 12. Results of WRD basin management Rising water levels & drought protection
    13. 13. Groundwater Monitoring Nearly 300 monitoring wells at 41 locations (more wells planned)
    14. 14. Nested Monitoring Wells Sampling Drilling
    15. 15. ANNUAL GROUNDWATER QUALITY TESTING Over 100 Chemicals Monitored
    16. 16. Two Annual Reports to Describe Basins
    17. 17. Benefits of Groundwater <ul><li>Local reliable supply </li></ul><ul><li>Drought protection </li></ul><ul><li>Cost effective </li></ul>
    18. 18. Historical Cost of Groundwater compared to Imported Water (cost per Acre Foot) Slide
    19. 19. Breakdown of Replenishment Assessment Projects, Programs, Monitoring, Planning, Administration, etc. Cost of Water
    20. 20. Spreading Water Costs in Central Basin
    21. 21. <ul><li>MWD increases have averaged more than 8% per year over the past 50 years </li></ul><ul><li>CBMWD surcharge increases have averaged 20% per year since they were imposed starting in 1991-92 </li></ul><ul><li>CBMWD surcharge increases have averaged 40% per year over the last two years </li></ul>Spreading Water Costs in Central Basin
    22. 22. <ul><li>Collection of projects to eliminate WRD demand for imported water </li></ul><ul><li>Projects to: </li></ul><ul><ul><li>Capture and conserve additional stormwater </li></ul></ul><ul><ul><li>Increase use of recycled water for groundwater replenishment </li></ul></ul><ul><li>Creates locally self-sufficient groundwater supply for 10% of population of California (4 million residents in the Central and West Coast basins) </li></ul>
    23. 23. WRD’s WIN Program will reduce or eliminate need for imported water to replenish groundwater
    24. 24. For more information visit www.wrd.org

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