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AP® Environmental Science

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Moderate

Dams and Silting

APES-L4IGZM

Rainfall events wash soil particles into streams. These soil particles collect in streams and rivers and referred to as silt.

What effect to dams have on silt flow?

A

Silt accumulates in dam reservoirs.

B

Silt levels are typically higher downstream from a dam.

C

In a properly constructed dam, silt flow is virtually unaffected.

D

Dams can hold and release silt as needed.

E

Dams can increase nutrient flow downstream due to silt deposition.