Which risk escalates downstream after a lahar overwhelms levees?

💡 Explanation

Channel avulsion increases because levee failure spreads slurry laterally, intensifying **sediment loading**. Therefore, future course changes become more probable rather than uniform soil enrichment or reduced groundwater absorption depending on composition.

• Which consequence results upon constructing housing developments on an alluvial fan without adequate drainage?
• Which mechanism drives upwelling along coastlines when Ekman transport moves surface water offshore?
• Which process limits the average depth of fjords subjected to glacial rebound?
• Which factor drives oxbow lake formation disproportionately during glacial retreats?
• Which mechanism causes the rapid uplift of land during a large subduction earthquake along a megathrust fault?
• Which risk increases when fluid injection occurs near a dormant seismic fault zone?