Which consequence results when levees fail catastrophically during exceptional flooding on an alluvial plain containing a major river?

💡 Explanation

Avulsion occurs because, during a levee breach, floodwaters seek a steeper, shorter path downslope, leading to the river abandoning its existing channel on the alluvial, creating a new course; therefore avulsion, rather than slower weathering or halting sediment processes, will dominate.

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