Which hazard increases following glacial cirque headwall over-steepening?

💡 Explanation

Rockfall risk increases via frost-weathering, because the freeze-thaw cycle weakens the now steeper, poorly supported rock faces in the cirque. This leads to enhanced fracturing, therefore increasing rockfall events, rather than sediment supply being increased through fluvial transport alone.

• Which topographic effect does accelerated solifluction primarily generate on moderate slopes?
• Which risk increases when flood control measures disrupt glacial outwash plains?
• Which ecological outcome occurs when deep ocean upwelling declines?
• Which risk increases when artificial levees constrict a river's floodplain during an extreme rainfall event?
• Which consequence results when deforestation occurs in an alluvial river basin?
• Which risk increases when continuous drip-feeding halts in caves?