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← GeographyWhich mechanism explains stream meandering increases due to reduced sediment load below dams?
A)Decreased bank erosion resistance✓
B)Increased channel flow velocity
C)Reduced lateral sediment deposition
D)Enhanced vegetation bank stabilization
💡 Explanation
When sediment load decreases below dams, reduced deposition results in lower bank strength and higher erosion rates because saturated sediment gives cohesion, increasing its resistance when vegetation is absent. Therefore, decreased bank erosion resistance results, rather than increased flow, reduced deposition which also lowers erosion, or enhanced stabilization, these require conditions of sediment load.
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