Question

What is the main drawback of standing wave flume?

(a) Loss of Hydraulic Jump

(b) Loss of Velocity of Flow

(c) Loss of Head

(d) Loss of Discharge

This question was posed to me in an internship interview.

The origin of the question is Regulation Modules in section Regulation Modules and Canal Structure of Irrigation Engineering

Answer 1

Correct choice is (c) Loss of Head

To explain I would say: The main and only drawback of standing wave flume is that, it has a greater tendency for the loss of head (HL) and if this loss is not available it acts as a venturi meter. Due to this reason the canal fall sites are used as standing wave flumes.