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Geography

Which outcome occurs downstream when sediment influx exceeds capacity in fluvial systems?

A)Increased alluvial fan deposition
B)Decreased base level erosion
C)Streambed armouring strengthens
D)Reduced levee formation events

💡 Explanation

An increase in sediment leads to increased aggradation, causing deposition in the form of alluvial fans due to reduced transport capacity. This is channel avulsion caused increased gradient; rather than erosion lessening or levees forming because carrying exceeds capacity.

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