Which outcome arises when increased sediment deposition at an alluvial fan's distributary channels exceeds the channel's incision rate?

💡 Explanation

When sediment deposition outpaces incision, channel aggradation occurs because the channel's capacity diminishes, creating a steeper slope and channel instability favoring stream avulsion. Therefore avulsion and new lobe forming results, rather than incision, base level increase, or sediment bypass which involve alternate conditions.

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