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← GeographyWhich risk increases when excessive irrigation is applied to an alluvial plain with poor drainage?
A)Decreased soil salinity near the surface
B)Increased groundwater recharge rates
C)Amplified compaction reduces available water✓
D)Induced seismic activity from increased load
💡 Explanation
When excessive irrigation occurs on poorly drained alluvial plains, soil compaction occurs because pore water displacement leads to settling and compression of soil particles therefore amplifed compaction reduces available water , rather than increased groundwater recharge, decrease soil salinity or induced seismicity, which involve vastly different mechanisms.
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