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Geography

Which outcome increases substantially when agricultural irrigation causes excessive drawdown in a karst aquifer?

A)Increased sinkhole incidence and subsidence
B)Elevation of the local water salinity
C)Attenuation of seasonal flood peaks
D)Greater aquifer recharge during droughts

💡 Explanation

Increased drawdown lowers support, because buoyant support decreases, triggering soil collapse via suffosion to create a sinkhole; therefore, increased sinkholes are the result, rather than aquifer changes or flood attenuation.

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