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← GeographyWhich localized outcome accelerates when groundwater extraction weakens coastal sediment structure?
A)Enhanced rate of coastal erosion✓
B)Increased depositional barrier islands
C)Reduced frequency of storm surges
D)Stabilization of estuarine salinity
💡 Explanation
Increased groundwater extraction reduces pore pressure; therefore, sediment consolidation lessens because the increased effective stress weakens soil structure, leading to an enhanced rate of coastal erosion rather than stabilization due to sediment transport.
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