Broad-Crested Weir



Gravity (m s-2) g
Channel width (m) b
Weir height (m) zb
Volumetric flow rate (m3 s-1) Q
Depth over weir (m) hc

Specify one of Q or hc and calculate the other.

Critical Conditions
Total head (m) H
    Upstream (Subcritical)   Downstream (Supercritical)
Depth (m) h1 h2
Velocity (m s-1) u1 u2
Froude number Fr1 Fr2