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← GeographyWhich outcome occurs when a coastal dam obstructs longshore sediment transport?
A)Increased erosion downdrift of dam✓
B)Saltwater intrusion into coastal aquifers
C)Rapid formation of offshore canyons
D)Decreased turbidity of ocean water
💡 Explanation
Erosion increases downdrift because sediment replenishment is blocked by the dam’s interruption of longshore drift; therefore, areas further down the coast erode faster, rather than experiencing the other scenarios stemming from different phenomena.
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