Which outcome develops when excess sediment loads overwhelm alluvial terraces?

💡 Explanation

Increased bedload chokes the channel; river gradient increases. Aggradation overwhelms the terrace system via sediment deposition rather than remaining in a former incised state. This leads to increased energy for lateral erosion and channel braiding because this is preferred over terrace stabilization or incision.

• Which phenomenon disrupts global air circulation when the Hadley cell boundary shifts significantly?
• Which mechanism causes increased flood risk to structures built on alluvial fans at the base plains of mountains?
• Which outcome occurs when katabatic winds accelerate glacial meltwater streams?
• Which process initiates headwall erosion resulting to expansion of mountain cirques?
• Which mechanism inhibits stream formation downstream when continental ice sheets melt?
• Near a continental transform fault, which process most frequently causes shallow-focus earthquakes?