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← GeographyWhich outcome increases erosion around groynes because of altered sediment transport?
A)Increased downdrift erosion rates✓
B)Decreased sediment deposition rates
C)Greater cross-shore sediment transfer
D)Reduced longshore current velocity
💡 Explanation
Downdrift erosion increases due to reduction in sediment deposition available after the groyne, a mechanism of sediment starvation, because the longshore drift is interrupted; therefore, erosion increases down-current rather than deposition increasing on both sides.
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