Formulas
HD = Hd + [Va/(2g)]
β = H/HD βi = Hi/HD Hi = βi HD
Ei = E + Hi Ci = (Ci/CD) CD
Qi = Ci (2g)1/2 L Hi3/2
(P/HD) vs CD (H/HD) vs (C/CD)
Select: SI units (metric) U.S. Customary
Spillway length L (m) [ft]:
Design head (excluding Va) Hd (m) [ft]:
Approach velocity Va (m/s) [fps]: [ Leave blank if you want the program to neglect the approach velocity ].
Dam height P (m) [ft]:
Freeboard Fb (m) [ft]:
Spillway crest elevation E (m) [ft]:
Your request was processed at 07:31:21 pm on February 16th, 2019 [ 190216 19:31:21 ].