Which consequence occurs when an alluvial aquifer collapses?

💡 Explanation

Surface subsidence happens because water pressure supports soil. Extracting water causes effective stress increases, thereby compacting alluvium via isostatic adjustment, leading to land subsidence; rather than increased seismicity as related to tectonic motion.

• Which mechanism alters stream flow acidity after acid rain due to surface runoff?
• Which effect results when the Earth's rotation deflects moving air masses?
• Which consequence results when increased acidic rainfall overwhelms limestone's buffering capacity?
• Which effect arises from a lahar encountering a constricted river valley located downslope?
• Which outcome is enhanced due to flux melting?
• Which mechanism limits development suitability within a floodplain filled with uncompacted alluvial sediments during seismic activity?