Question

Which type of weir is suitable for hard clay and consolidated gravel foundations?

(a) Gravity weir

(b) Non-gravity weir

(c) Masonry weir with a vertical drop

(d) Rock-fill weirs with sloping aprons

This question was posed to me in an online interview.

The origin of the question is Diversion Head Works in portion Diversion Head Works, Hydraulic Jump Usefulness in Irrigation Structure of Irrigation Engineering

Answer 1

Correct choice is (c) Masonry weir with a vertical drop

Explanation: This type of weir was used in all the old head-works and is particularly suitable for hard clay and consolidated gravel foundations. Masonry weir is becoming obsolete and all the modern constructions are done by the modern concrete weirs.