Over-extraction from urban aquifers in karst increases which risk?

💡 Explanation

Increased extraction lowers the water table, promoting mechanical weathering via the unloading pressure. This leads to increased effective stress because the reduced pore pressure weakens the rock matrix; therefore, more sinkholes form rather than increased water infiltration at a lowered water table.

• Which landform consequence occurs where freeze-thaw weathering is dominant?
• Which phenomenon leads to desert formation at approximately 30 degrees latitude north and south?
• Which mechanism accelerates floodplain widening in a meandering river exhibiting alluvial terraces?
• Along coastlines, which weather effect results when increased local pressure gradients enhance wind shear?
• Which phenomenon disrupts coastal upwelling when intensified ocean gyre circulation creates strong downward Ekman transport?
• Which consequence frequently results when heavy tephra accumulates downwind?