Which floodplain change results when sediment deposition exceeds erosion?

💡 Explanation

Alluvial terrace formation raises the floodplain because aggradation by sediment deposition outpaces erosion, therefore forming new, higher surfaces; rather than meander incision or channel braiding causing different erosional patterns in the original floodplain.

• Which outcome occurs when excessive groundwater extraction destabilizes coastal aquifers?
• Which risk to coastal infrastructure increases when deep-sea earthquakes trigger underwater landslides near a subduction zone?
• Which mechanism limits meandering stream formation within deeply incised canyons?
• Which mechanism sorts sediment in alluvial placer deposits?
• Which outcome arises because northern hemisphere cyclones exhibit deflection?
• Which consequence results when reduced sediment supply from rivers impacts longshore drift along a coastline?