Section 4: Soil and Water Conservation Engineering
Soil and Water Erosion
Subtopic: Vegetative waterways
Question Statement:
A grassed waterway is designed primarily to:
Options:
(A) Convey concentrated surface runoff safely down a slope at non-erosive flow velocities
(B) Store water permanently for livestock drinking
(C) Trap sand for construction use
(D) Increase the speed of gully head advancement
Answer Key:
A
Step-by-Step Solution & Explanation
Grassed waterways are broad, shallow parabolic or trapezoidal channels protected by dense erosion-resistant grasses, designed to conduct surplus runoff water off agricultural land without scouring or gullies.