Question

Which CD work is generally adopted when the drainage discharge is small and the drain crosses the canal with its bed level equal to or slightly higher than the canal FSL?

(a) Syphon Aqueduct

(b) Level crossing

(c) Inlets and outlets

(d) Aqueduct

This question was posed to me in quiz.

This interesting question is from Types of Cross Drainage Work in portion Cross Drainage Work of Irrigation Engineering

Answer 1

The correct option is (c) Inlets and outlets

The best I can explain: Level crossing is generally adopted when the canal and the drainage are practically at the same level and for high flood drainage discharge but short-lived. Aqueduct or super passage is adopted when high flood drainage discharge is large.