Question

What device is placed in front of head regulator for silt removal?

(a) Weir

(b) Silt Extractor

(c) Silt Excluder

(d) Barrage

The question was posed to me in a national level competition.

This is a very interesting question from Diversion Head Works and its Components in chapter Diversion Head Works, Hydraulic Jump Usefulness in Irrigation Structure of Irrigation Engineering

Answer 1

The correct choice is (c) Silt Excluder

To elaborate: Silt excluder is placed in front of the head regulator by which the silt is removed from the water even before the water enters the canal. The fundamental principle on which this device acts is the fact that stream carrying silt in suspension, the concentration of silt charge is more in upper layers than in lower layers. Therefore this device is so designed for separating these two layers without disturbance.