Which effect occurs in coastal aquifers when excessive groundwater extraction lowers the water table?

💡 Explanation

Saltwater intrusion occurs through capillary action because lowering the water table reduces the hydrostatic pressure, therefore allowing denser seawater to migrate inland, rather than maintaining the freshwater storage due to hydraulic head.

• Which risk increases for coastal wetlands when longshore drift is interrupted by artificial groynes?
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• Which outcome results when significant tephra deposition reduces stream capacity?
• Which stone surface characteristic indicates prolonged abrasion on ventifacts?
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