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← GeographyWhich outcome occurs with excessive groundwater extraction near coastlines?
A)Saltwater intrusion contaminates aquifers✓
B)Increased coastal sediment deposition
C)Stabilization of land subsidence rates
D)Enhanced freshwater lens formation
💡 Explanation
Saltwater intrusion happens because reduced freshwater pressure allows saline water to infiltrate. The mechanism is hydraulic gradient reversal; therefore, contamination occurs rather than sediment changes or lens improvements where aquifers are well-managed.
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