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← GeographyWhich outcome results when flood control measures disrupt alluvial deposition?
A)Delta subsidence and coastal erosion✓
B)Increased biodiversity in floodplains
C)Enhanced groundwater recharge rates
D)Stabilization of river channel migration
💡 Explanation
Delta subsidence and coastal erosion occurs because sediment starvation from reduced alluvial deposition prevents natural land-building that *compensates for compaction*, *glacio-isostatic rebound* and sea level rise. Therefore, the delta subsides rather than accretes, exacerbating coastal erosion.
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