Near coastlines underlain by limestone, which risk to underground freshwater aquifers increases due to storm surges?

💡 Explanation

Saltwater intrusion increases because storm surges force seawater into inland sinkholes; this mechanism creates reverse hydraulic gradients causing saline water to upwell rather than freshwater aquifers remaining isolated, therefore leading to contamination.

• Which risk increases when road construction disrupts the active layer above permafrost slopes?
• Which mechanism causes preferential deposition on the leeward side?
• Which outcome occurs when degassing reduces viscosity of lava?
• Which consequence occurs after long-term barrier island migration?
• Which hazard sharply increases during lava dome growth?
• Which mechanism primarily contributes to the steep walls observed surrounding fjords?