Question

On what factor in case of branch canals, the construction site for a fall depends?

(a) Cost of Excavation

(b) Topography

(c) Commanded Area

(d) Cost of fall

I had been asked this question in an online interview.

I would like to ask this question from Canal Falls in chapter Canal Falls of Irrigation Engineering

Answer 1

Right choice is (c) Commanded Area

The explanation is: By considering the commanded area of a branch canal or a distributary canal the location for the falls is decided. The procedure is to fix the FSL needed at the head of the off taking channels and outlets. Thus the FSL can be marked at all commanded points and hence deciding appropriate locations for the falls in canal FSL and therefore in canal beds.