Multiple Choice
Why do beaches become sediment-starved after dams are installed on rivers?
A) Dams trap water,thus reducing the volume of water that enters the ocean and erodes away the coast to produce sediment.
B) Rivers supply sediment to beaches;dams trap river sediment,and thus that sediment cannot make it to the beaches.
C) The chemical composition of river water is changed when it flows through a dam;this alters the amount of chemical weathering that occurs along the coast.
D) Dams are built using sediment covered in concrete;the sediment most often comes from nearby beaches.
Correct Answer:
Verified
Correct Answer:
Verified
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