Which condition causes accelerated barrier island erosion via overwash?

💡 Explanation

Reduced river sediment increases island erosion; wave OVERWASH transports sediment landward to the lagoon because there is less beach available to dissipate wave energy. This accelerates erosion rather than stabilizing the barrier; increased biodiversity or decreased land subsidence reduce relative coastal erosion.

• Following a Plinian eruption, which effect is primarily determined by air entry during pyroclastic density current propagation?
• Which geographical outcome results from loess sediment deposition?
• Which process triggers rapid delta subsidence around human-engineered lakes?
• Which outcome occurs where persistent, high winds encounter unconsolidated sediments?
• Which outcome occurs when carbon dioxide concentrations increase within karst cave systems?
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