Section 4: Soil and Water Conservation Engineering
Soil and Water Erosion
Subtopic: Gully control structures – drop, drop inlet and chute spillways
Question Statement:
In gully control structures, the structural component of a drop spillway specifically designed to dissipate hydraulic kinetic energy of falling water and protect downstream channel from scouring is the:
Options:
(A) Headwall extension
(B) Stilling basin with baffle piers and end sill
(C) Cut-off wall
(D) Wingwall
Answer Key:
B
Step-by-Step Solution & Explanation
The stilling basin (apron with chute blocks, baffle piers, and end sill) forces a hydraulic jump to form on the reinforced concrete apron, dissipating high kinetic energy before discharge into downstream channel.