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Calculation of Upper Weir Coefficients - Submergence Adjustment <br />Upper Weir <br />Submergence Calc <br />500Yr <br />PMF <br />Crest Length= <br />ft. <br />15 <br />15 <br />Q total= <br />cfs <br />792 <br />1522 <br />Uppwer Weir Q openings= <br />cfs <br />123 <br />134 <br />Q= Qtotal - Q openings <br />cfs <br />669 <br />1388 <br />Weir Coefficient - upper weir <br />3.19 <br />2.70 <br />q (weir)= <br />cfs <br />44.6 <br />92.5 <br />H1 (head over Weir including Vel head) <br />ft. <br />5.81 <br />10.54 <br />WS above Upstream Weir Elev <br />ft. <br />Weir Wall Height <br />ft. <br />8.50 <br />8.50 <br />Flow Depth above upstream weir with velocity head <br />ft. <br />14.31 <br />19.04 <br />Approach Velocity Head Estimate <br />ft. <br />0.21 <br />0.44 <br />Observed WI above weir (w/o V head) <br />ft. <br />14.10 <br />18.60 <br />hl observed upper weir (w/o velocity head) <br />ft. <br />5.60 <br />10.10 <br />Tailwater below weir <br />ft. <br />9.92 <br />14.05 <br />h2 (downstream depth above crest) <br />ft. <br />1.42 <br />5.55 <br />Weir Submergence (d/H=h2/h1) <br />0.254 <br />0.549 <br />Submergence Coefficient factor <br />0.957 <br />0.812 <br />Velocity of Approach Above upper Weir <br />fps <br />3.75 <br />5.45 <br />Adjusted Velocity Head <br />ft. <br />0.22 <br />0.46 <br />Adjusted Tailwater Observed above upper Weir <br />ft. <br />14.09 <br />18.58 <br />