Which process initiates channel avulsion in an alluvial plain with high sediment load?

💡 Explanation

When aggradation raises the channel bed above the floodplain due to excessive sediment load, flow overtops the levees, creating entirely new channels. Therefore aggradation causes avulsion , rather than fault reactivation, sea level rise or runoff, which affects alluviation via different forcing mechanism.

• Which process primarily maintains upwelling along the western coasts of continents?
• Which mechanism causes increased flood risk to structures built on alluvial fans at the base plains of mountains?
• Which outcome results from sustained creep along a transform plate boundary?
• Which process limits soil profile development weathering deeply?
• Which outcome is caused by the elastic rebound mechanism along a transform fault?
• Which mechanism amplifies the northward swing of the meandering jet stream transporting water vapor across continents?