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← GeographyWhich 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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