Which risk increases for structures founded upon unstable alluvial soils?

💡 Explanation

Subsidence risk increases because alluvial soils are unconsolidated. The mechanism is compaction. Compaction reduces volume under load, therefore settlement occurs, rather than other effects like liquefaction because that involves rapid shaking during seismic events.

• Which outcome results when melting permafrost destabilizes slopes?
• Which mechanism causes a change in a geostrophic stream's flow direction influenced by Earth's rotation near the equator?
• Which geographic event results when meanders erode adjacent to neck?
• Which phenomenon causes enhanced primary productivity following coastal upwelling events?
• Which process dominates sediment sorting in a proglacial lake experiencing increased meltwater discharge?
• Which geomorphic feature develops when melting permafrost destabilizes slopes in arctic tundra?