Which outcome occurs when excessive groundwater extraction destabilizes coastal aquifers?

💡 Explanation

Increased saltwater intrusion occurs through aquifer compaction because, as fresh water is removed, pore pressure decreases, therefore accelerating subsidence and allowing saltwater to replace the fresh; rather than weathering or tide changes.

• Which outcome occurs when coastal upwelling weakens during ENSO?
• Which mechanism reduces soil fertility when prolonged floodplain inundation occurs on alluvial plains used for agriculture?
• Which risk increases when a subsurface fault line intersects a large reservoir?
• Which phenomenon initiates the descent of dry anticyclonic air in Hadley cells near 30 degrees latitude?
• Which phenomenon causes the formation of patterned ground in Arctic regions underlain by permafrost?
• Which landform develops when solifluction lobes advance over previously deposited sediments?