Question

Scouring escapes have become obsolete because of?

(a) Piers

(b) Weir Walls

(c) Falls

(d) Silt Ejectors

I have been asked this question in unit test.

I need to ask this question from Types of Canal Escapes in portion Regulation Modules and Canal Structure of Irrigation Engineering

Answer 1

Right choice is (d) Silt Ejectors

For explanation: When the deposited silt is to be scoured out, a discharge higher than the full supply discharge is let off into the canal from its head. To produce scouring velocities the gates are raised, to scour out the silt deposited. A cross regulator may also be provided for better efficiency just the downstream of scouring escape. Therefore, scouring escapes have become obsolete because silt ejectors are used nowadays for better efficiency.