Inputs
m
m
m (0 if Rehbock unknown)
leave blank for default
Equations
- Rectangular sharp-crested: Q = (2/3)·Cd·b·√(2g)·H3/2; default Cd ≈ 0.62 (Rehbock if P given).
- V-notch: Q = (8/15)·Cd·tan(θ/2)·√(2g)·H5/2; default Cd ≈ 0.58.
- Broad-crested: Q = Cd·b·H3/2·√(g·(2/3)3); default Cd ≈ 1.0 (in metric form Q = 1.7·b·H1.5).
- Orifice: Q = Cd·A·√(2gh); default Cd ≈ 0.62.
- Imperial: same form, with g = 32.174 ft/s².
Results
Type—
Cd used—
Discharge Q—
Q (alt)—