Develop an expression for the quantity of liquid flowing over a sharp-edge V-notch of total angle 2, in terms of the head H above the bottom of the

Develop an expression for the quantity of liquid flowing over a sharp-edge V-notch of total angle 2θ, in terms of the head H above the bottom of the notch, the angle θ, and the coefficient of discharge Cd, assuming the velocity of approach to be small.