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0 Spillway Pond F <br />Determine flow characteristics down 10.3% Grade <br />Pond F Emergency Spillway <br />Manning's Equation <br />Flow In a Trapezoidal Channel <br />Depth D <br />0.89 <br />Width W <br />5 <br />Slope S <br />0.103 <br />Mannings "N" N <br />0.04 <br />Side Slope X <br />2 <br />AREA= (W *D) +(X *D ^2)= <br />WETTED PERIMETER= (W) +2 *[((X <br />*D) ^2 +D ^2)^0.5] <br />R= AREA/WETTED PERIMETER <br />V= (1.49/N) *(R ^.667) *(S ^.5) = <br />Q =AXV= <br />Q REQUIRED - Peak Discharge <br />Sediment Pond F <br />Riprap Sizing - Down Face of Embankment - Pond F <br />D50 = Size of Riprap <br />D50 = ((V X S ^.17)/7.58)) ^2 <br />D50 = Diameter in feet <br />V = Velocity <br />S = Slope <br />D50 = 0.68 feet <br />0 <br />Feet <br />Feet <br />Express as Decimal <br />Express as Decimal <br />Slope = X:1 <br />6.03 FEET ^2 <br />8.98 FEET <br />0.67 <br />9.17 FT /SEC <br />55.34 CFS <br />52.92 CFS <br />8 inches Use 6" to 18" Rock <br />TR -64 App. B -6 08/09 <br />/?P.PPouE,.O 1 zlzvo9 <br />