Section 4: Soil and Water Conservation Engineering
Soil Conservation Structures
Subtopic: Grassed Waterways
Question Statement:
Which cross-sectional shape is most commonly adopted in field construction of grassed waterways because it conforms naturally to the watercourse and allows easy tractor crossing?
Options:
(A) Parabolic cross-section
(B) Triangular (V-notch) with 90 degree sides
(C) Deep rectangular section
(D) Semi-circular concrete conduit
Answer Key:
A
Step-by-Step Solution & Explanation
Parabolic cross-sections represent the natural equilibrium cross-section formed by flowing water, provide broad shallow discharge, and permit farm machinery to cross easily.