Which risk increases when a levee, constructed from cohesive soil, is rapidly saturated by floodwater?

💡 Explanation

When a cohesive soil levee is rapidly saturated, increased pore water pressure reduces effective stress between soil particles, potentially triggering liquefaction because strength decreases. Therefore liquefaction risk increases, rather than erosion/seepage/desiccation which correlate to different soil-water interactions within the levee structure.

• Which surface change develops because localized airflow consistently removes fine sediment?
• Which sinkhole formation risk increases when groundwater cave ceilings collapse?
• Which increased risk results when impermeable layers underlie alluvial fan deposits?
• Which erosional process is accelerated when freeze-thaw cycles occur within a cirque formation?
• Which process determines the angle of repose of an alluvial fan deposit formed by debris flow?
• Which mechanism significantly reduces river flow velocity immediately adjacent to a natural levee?