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Lower Coachella Valley Groundwater Monitoring Network Southern District

Lower Coachella Valley Groundwater Monitoring Network Southern District. PR. LA. Coachella Valley. Request by Governor’s Drought Panel. Improve existing networks presently being monitored Initiate additional, future networks in unmonitored basins

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Lower Coachella Valley Groundwater Monitoring Network Southern District

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  1. Lower Coachella ValleyGroundwater Monitoring NetworkSouthern District PR LA Coachella Valley

  2. Request by Governor’s Drought Panel • Improve existing networks presently being monitored • Initiate additional, future networks in unmonitored basins • Improve data collection and reporting of groundwater data

  3. Imported water Groundwater Lower Coachella Valley was identified as the top priority unmonitored basin in the state

  4. Objectives • Change in storage • #1 Water levels • Degradation • Colorado river water • sea water intrusion • applied irrigation water • #2 Water quality

  5. Lower Coachella Valley sea level lake <100 (Qoa) (Lake deposits) 150 - 300 100 - 200 300-600 >1000 (Ocotillo cong)

  6. Center Semi-perched Upper Aquifer Aquitard (realistic) Lower Aquifer w/clays

  7. Margins Upper & Lower (?) Aquifers Lower (?)Aquifer or Canebrake conglomerate of Palm Springs Fm Borrego clays of Palm Springs Fm

  8. Total 8 sites Single completion Clustered or nested 4-inch diameter MS (400 - 500) 4-inch diameter PVC (200 - 300) 20 foot screen Plannedwells

  9. Speedstar 30K • Mud rotary • Air rotary • Casing hammer • Stratex

  10. Planned well locations

  11. Lake Cahuilla shoreline Margins SL SL

  12. SL SL SL SL

  13. West side margin Well location

  14. Salton Sea SL Well location SL SL

  15. Ancient Lake Cahuilla shoreline Planned well location

  16. East side margin saf Painted Canyon fan Well location

  17. saf Thermal Canyon fan Well location

  18. Thermal Canyon fan

  19. saf Box Canyon fan Well location

  20. Box Canyon fan

  21. Valley floor

  22. K-12 School site

  23. Well location sand dune deposits University extension campus

  24. Major & Ongoing Issues • Federal review (BLM and F & WS) • Tribal lands • Wilderness areas • Endangered species act • desert tortoise

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