Which outcome occurs with excessive groundwater extraction near coastlines?

💡 Explanation

Saltwater intrusion happens because reduced freshwater pressure allows saline water to infiltrate. The mechanism is hydraulic gradient reversal; therefore, contamination occurs rather than sediment changes or lens improvements where aquifers are well-managed.

• Which risk dramatically increases when diverting surface runoff toward karst regions?
• Which geographic feature results when prevailing wind encounters an obstacle, reducing its velocity and causing increased alluvial deposition?
• Which risk increases when seasonal thawing weakens permafrost integrity?
• Which outcome occurs when highly viscous lava flows within a steep volcanic conduit reach atmospheric pressure saturation?
• Which stress outcome occurs when differential crustal uplift?
• Which mechanism causes liquefaction of soil during an earthquake in a saturated sandy deposit?