Why does benching reduce the risk of mass movements?
A)It increases the amount of vegetation on a slope.
B)It prevents rainwater from seeping into the hill.
C)It lowers the average slope of a hill.
D)It fastens unstable rock to the underlying stable bedrock.
E)Benching does not reduce the risk of mass movements.

Question

Quizplus · Accepted Answer

Bench cutting reduces the risk of mass movements by lowering the average slope of a hill. By creating a series of flat surfaces on the hill slope, benching reduces the steepness of the terrain and provides stability to the underlying soil or rock. This helps to prevent landslides, slumps, or rockfalls that occur due to gravity and soil erosion. The creation of benches also provides opportunities for soil stabilization and vegetation to grow, which further reduces the risk of mass movements.

Why Does Benching Reduce the Risk of Mass Movements