Question

On what term does the construction of a fall in the case of the main canal depend?

(a) Discharge Capacity of the Canal

(b) Length of the Canal

(c) Topography

(d) Cost of Excavation and Filling versus Cost of fall

The question was posed to me by my college professor while I was bunking the class.

My doubt stems from Canal Falls topic in division Canal Falls of Irrigation Engineering

Answer 1

Correct option is (d) Cost of Excavation and Filling versus Cost of fall

The explanation is: The main does not irrigate any area directly, so therefore the site of the fall is based on the considerations of economy in cost of excavation and filling versus cost of fall. The excavation and filling on both sides of the fall should be balanced because unbalanced work causes extra cost.