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← GeographyWhich outcome is accelerated when levee construction reduces floodplain extent?
A)Increased channel bed sediment scour✓
B)Decreased regional groundwater recharge
C)Downstream floodplain nutrient deposition
D)Upstream reduction in stream gradient
💡 Explanation
Increased channel bed sediment scour accelerates because the confinement increases flow velocity, therefore sediment transport capacity rises well above the stream equilibrium, rather than deposition on distant areas.
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