Which risk increases along a floodplain when alluvial mining removes substantial sediment?

💡 Explanation

Increased river avulsion frequency occurs because sediment removal reduces the floodplain's resistance to channel migration. Fluvial avulsion is more likely; therefore, the river jumps its banks more often, rather than staying within its existing channel.

• Which outcome during glacial retreat increases sediment loading into cirque lakes?
• Which outcome occurs when seasonal subtropical high-pressure systems weaken?
• Which topographic feature is primarily formed by glacial erosion within a cirque?
• Which outcome is caused when coastal upwelling strengthens along the Peru coastline?
• Which outcome occurs when a transform fault zone restricts a river's meander plain expansion?
• Which process controls uplift when two continental plates collide at reverse fault zones?