Which outcome commonly results following extensive groin construction inhibiting longshore sediment transport near barrier islands?

💡 Explanation

Extensive groin construction interrupts sediment supply to downdrift islands; the mechanism is sediment starvation, leading to increased erosion because the equilibrium sediment budget is disrupted. Therefore, downdrift erosion will impact barrier islands rather than causing upward build-up or accretion elsewhere under stable isostatic conditions.

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