Section 4: Soil and Water Conservation Engineering
Soil Conservation Structures
Subtopic: Loose Rock Check Dams
Question Statement:
In first- and second-order gully tributaries, loose stone check dams are constructed to:
Options:
(A) Reduce gully channel bed slope, decrease runoff velocity, and trap eroded bed-load sediment
(B) Store water for long-term domestic consumption
(C) Prevent all runoff from exiting the watershed
(D) Accelerate water velocity to flush stones out
Answer Key:
A
Step-by-Step Solution & Explanation
Semi-permeable loose rock check dams create stepped flatter gradients behind each weir, settling sediment to gradually stabilize the gully bed and promote revegetation.