Question

Which type of canal does not need cross drainage structures?

(a) Side Slope Canal

(b) Contour Canal

(c) Watershed Canal

(d) Field Channel

The question was asked during an internship interview.

This intriguing question comes from Canal Irrigation System in section Canal Irrigation System of Irrigation Engineering

Answer 1

Correct choice is (a) Side Slope Canal

For explanation I would say: Side slope canal is that type of canal which runs perpendicular to the ground contours, i.e they run parallel to natural drainage flow and do not intercept the drainage channels and therefore avoiding the construction of cross drainage structures.