Broad Crested Weir Calculator

Broad Crested Weir Calculation

The calculator will calculate the water flow rate of a channel's full width using broad crested weir method for given values of discharge constant, width of the weir and both head (1, 2) on the Weir.
Formula: q = Cd × b × h2 × (2g (h1 - h2) )1/2
Where, q = Water Flow Rate, Cd = Discharge Constant, b = Width of the Weir, g = Gravity (9.81 m/s²), h1, h2 = Head 1 and Head 2 on the Weir

Width of the Weir (b) = m
Head 1 on the Weir (h1) = m
Head 2 on the Weir (h2) = m
Discharge Constant (Cd) =
Water Flow Rate (q) = m³/s