Which risk is amplified when increased stream power transports excessive alluvial sediment load across a subsiding floodplain?

💡 Explanation

When stream power is elevated and sediment load increased, alluvial deposition becomes unstable because the channel rapidly aggrades, leading to channel avulsion when the slope threshold is exceeded. Therefore accelerated localized avulsion risk occurs, rather than decreased recharge, reduced biodiversity or channel stabilization, which do not directly arise from rapid alluvial deposition.

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