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← GeographyWhich risk significantly increases when groundwater extraction exceeds recharge in karst cave systems?
A)Decreased carbon sequestration rates
B)Promoted speleothem formation rates
C)Increased risk of sinkhole collapse✓
D)Enhanced cave ecosystem stability
💡 Explanation
The risk of sinkhole collapse increases due to increased groundwater extraction, because the effective stress rises as a result of decreased pore pressure and thus soil destabilizes via the mechanism of effective stress reduction; therefore, sinkholes form rather than allowing slower dissolution, due to matrix support loss.
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