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← GeographyWhich erosional outcome occurs when a dam interrupts alluvial sediment deposition downstream?
A)Increased bank erosion below dam✓
B)Formation of widespread braided streams
C)Rapid glacial ice damming events
D)Stabilization of river channel morphology
💡 Explanation
Increased bank erosion increases because sediment starvation intensifies hydraulic action; lacking sediment, the river's erosive power concentrates on the banks causing greater instability, therefore bank erosion is directly caused, rather than braiding of streams or stabilization.
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