The construction of a dam across a river is likely to cause ________ upstream and ________ downstream.
A) erosion; aggradation
B) erosion; erosion
C) aggradation; erosion
D) aggradation; aggradation

Question

Quizplus · Accepted Answer

When a dam is constructed across a river, it can cause aggradation upstream as water backs up and slows down, allowing sediment to settle out. Downstream, the river's flow can be reduced, leading to erosion as the river's channel adjusts to the new flow conditions.

The Construction of a Dam Across a River Is Likely