Valve (%)   Flow (cfs) †   Flow (gal/d-1) ‡   Orifice (ft2)§   Height  (ft)¶   Cd   100   0.0740   47800   0.049   0.375   0.307   75   0.0444   28700   0.037   0.375   0.245   60   0.0226   14600   0.029   0.375   0.156   50   0.0191   12300   0.025   0.375   0.158 †cfs x 101.9 = m3 h-1 ‡gal d-1 x 1.58 x 10–4 = m3 h-1 §ft2 x .0926 = m2 ¶ft x .304 = m

Table 1: Wetland hydraulic flow computation.