V Notch Weir Flow Formula

Equation for calculate v notch weir flow is,

t = (8 / 15) × d × √ (2 × g) × tan(a / 2) × h^{(5 / 2)}

Where,
t = Total Discharge
g = acceleration of gravity(9.81m/s²)
a = Angle of the notch
h = Height of the liquid above the apex of the notch(m)
d = Coefficient of discharge