Question

How many river training works are needed on the canal head works?

(a) 5

(b) 3

(c) 4

(d) 2

This question was addressed to me during an interview.

My question comes from Diversion Head Works and its Components topic in division Diversion Head Works, Hydraulic Jump Usefulness in Irrigation Structure of Irrigation Engineering

Answer 1

The correct choice is (b) 3

The explanation: Three river training works are needed on the canal head works, to prevent the river from outflanking the works due to a change in its course and ensure smooth and an axial flow of water. The works include guide banks, marginal bunds, and spurs. Guide banks force the river into the restricted channel, thus ensuring smooth and axial flow near the weir site. In order to protect the area from submergence due to raise in HFL these marginal bunds are provided. The spurs are the works that protect the marginal bunds.