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← GeographyWhich risk increases for coastal wetlands when longshore drift is interrupted by artificial groynes?
A)Increased saltwater intrusion upstream
B)Rapid decline in fluvial sediment supply✓
C)Amplified storm surge propagation inland
D)Localized increase in tidal amplitude
💡 Explanation
Wetland subsidence becomes more likely because groynes trap sediment via longshore drift preventing its natural distribution, therefore wetlands starve rather than accreting sediment. Saltwater intrusion is more related to sea-level rise and surge relates to bigger storms.
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