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← GeographyWhich risk significantly increases where loess soil compaction inhibits drainage?
A)Localized surface subsidence develops rapidly✓
B)Increased silica weathering decreases stability
C)Soil carbon sequestration rates diminish
D)Vegetation shows decreased transpiration efficiency
💡 Explanation
Surface subsidence becomes likely because compacted loess prevents water infiltration, increasing pore water pressure and destabilizing soil. This process known as hydrocompaction causes collapse rather than silica weathering or carbon changes; therefore, ground subsidence develops.
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