Question

An Ogee weir 5 m long had a head of 40 cm of water. If CD = 0.61, find the discharge over the weir.

(a) 2.9 m^3/s

(b) 2.3 m^3/s

(c) 3.1 m^3/s

(d) 3.3 m^3/s

I had been asked this question by my school principal while I was bunking the class.

I'm obligated to ask this question of Discharge Over different type of weirs topic in section Orifices, Mouthpieces, Notches and Weirs of Fluid Mechanics

Answer 1

The correct choice is (a) 2.9 m^3/s

Easiest explanation: Q = 0.67 * Cd * L * √2g * H^1.5

                     Q = 2.3 m^3/s.