Question

What type of canal necessitates construction of cross drainage works more than any other types?

(a) Side Slope Canal

(b) Contour Canal

(c) Watershed Canal

(d) Field Channel

This question was addressed to me at a job interview.

Origin of the question is Canal Irrigation System in section Canal Irrigation System of Irrigation Engineering

Answer 1

The correct choice is (b) Contour Canal

For explanation I would say: In this contour canal the drainage of the river flow is always perpendicular to the ground contours, and this would certainly require crossing of natural drains and streams, which necessitates the construction of cross drainage structures.