Which outcome occurs when a river's natural levees collapse under extreme hydraulic pressure?

💡 Explanation

Avulsion occurs because levee failure reduces channel confinement, encouraging the river to seek steeper paths through the floodplain via channel switching; therefore, avulsion dominates, rather than continued flow through the old channel which is now blocked.

• Which consequence results when intense monsoonal rains saturate loess deposits covering agricultural land?
• Which outcome frequently results along strike-slip faults during interseismic periods?
• Which outcome occurs when a meander stream's floodplain becomes highly constricted?
• Which outcome results when pre-existing rocks undergo differential erosion by wind?
• When coastal bedrock subsides following glacial retreat in fjords, which outcome is most probable?
• Salt marsh accretion changes which sediment characteristic via bioturbation?