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← GeographyWhich consequence results when excessive groundwater extraction dewaters an aquifer near karst topography?
A)Accelerated sinkhole formation and subsidence✓
B)Increased surface runoff and erosion
C)Decreased soil salinity near estuaries
D)Enhanced geothermal gradient and upwelling
💡 Explanation
Excessive groundwater extraction reduces pore water pressure, leading to decreased support for overlying sediments causing accelerated *mechanical weathering*. Therefore, sinkhole formation accelerates because this subsidence occurs rather than other effects related to surface water dynamics.
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