Which process results from increasing sediment load on a river flowing across a coastal alluvial plain?

💡 Explanation

When sediment load on an alluvial plain increases, aggradation elevates the riverbed because the stream's transport capacity is exceeded, leading to channel instability and avulsion—the river jumping its banks and forming new channels. Therefore avulsion and bifurcation result, rather than downcutting, dissolution, or rebound which require different mechanisms.

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