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← GeographyWhich outcome results when improperly designed fjord hydropower dams impede sediment transport?
A)Accelerated abrasion of turbine blades
B)Saltwater intrusion to formerly freshwater
C)Downstream delta erosion accelerates intensely✓
D)Methane clathrate destabilization greatly increases
💡 Explanation
Intense downstream delta erosion accelerates because dams block sediment renewal via sediment starvation; therefore, the delta recedes rather than accretes normally. Upstream effects can happen, but delta erosion is the explicit nearshore consequence.
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