Laserfiche WebLink
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 0.89 <br />Width W 5 <br />Slope S 0.103 <br />Mannings "N" N 0.04 <br />Side Slope X 2 <br />AREA=(W*D)+(X*D^2)= <br />WETTED PERIMETER=(W)+2*[(( X*D)"2+D^2)110.5] <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 />U <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 />54.88 CFS <br />8 inches Use 6" to 18" Rock <br />TR-61 App-136 04/09 <br />PPR 6VC D <br />4 / 17/84