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← GeographyWhich outcome occurs when prolonged aquifer depletion underlays karst?
A)Accelerated sinkhole formation and infrastructure collapse✓
B)Increased geyser activity and silica deposition
C)Enhanced soil stability due to reduced porewater
D)Decreased baseflow and stable stream morphology
💡 Explanation
Increased pore pressure reduction causes effective stress increase via compaction because the effective intergranular stress rises; therefore, voids collapse and cause sinkholes, rather than stable soil. Chemical weathering also accelerates.
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