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Many areas contain saline groundwater—most of these areas are near the ocean, but brines

Salt water intrusion. Many areas contain saline groundwater—most of these areas are near the ocean, but brines can be present in mid-continent ~10 – 20% of fresh water reserves are underlain by saline water. Salt water intrusion.

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Many areas contain saline groundwater—most of these areas are near the ocean, but brines

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  1. Salt water intrusion Many areas contain saline groundwater—most of these areas are near the ocean, but brines can be present in mid-continent ~10 – 20% of fresh water reserves are underlain by saline water

  2. Salt water intrusion Looks like you should be able to pump for a long time before salt water gets to well, but small pumping rates do bring salt water in. (Fitts, 2002)

  3. Salt water intrusion Simplification of real-world situation (Fitts, 2002)

  4. Salt water intrusion At hydrostatic equilibrium, Ps = Pf (Schwartz and Zhang, 2003)

  5. Salt water intrusion (Schwartz and Zhang, 2003)

  6. Salt water intrusion (Schwartz and Zhang, 2003)

  7. Salt water intrusion (Schwartz and Zhang, 2003)

  8. Salt water intrusion (Schwartz and Zhang, 2003)

  9. Salt water intrusion (Schwartz and Zhang, 2003)

  10. Salt water intrusion What can we do to limit salt-water intrusion? Not much, basic physical principles Strictly limiting the amount of drawdown is the best. Many low-capacity wells cause less drawdown than a few high capacity wells.

  11. Salt water intrusion Prevention/Remediation (Schwartz and Zhang, 2003)

  12. Salt water intrusion Prevention/Remediation (Schwartz and Zhang, 2003)

  13. Salt water intrusion Prevention/Remediation (Schwartz and Zhang, 2003)

  14. Salt water intrusion Prevention/Remediation (Schwartz and Zhang, 2003)

  15. Salt water intrusion Prevention/Remediation Typically only practical in southern California. Large urban areas provide injection water. (Schwartz and Zhang, 2003)

  16. hf Ocean Q z z b Freshwater Saltwater L Location of Freshwater Interface Let’s take a minute and solve for L, algebraically

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