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SRlIIwav Pond F <br />Determine flow characteristics in steel flume across Fire Mountain Canal <br />Pond F Steel Flume <br />Manning's Equation <br />Flow In a Rectagular Channel <br />Depth <br />D <br />1.17 <br />Feet <br />Width <br />W <br />3 <br />Feet <br />Slope <br />S <br />0.03 <br />Express as Decimal <br />Mannings "N" <br />N <br />0.013 <br />Express as Decimal <br />Side Slope <br />X <br />0.1 <br />Slope = X:1 <br />AREA=(W*D)+(X*D"2)= <br />WETTED PERIMETER=(W)+2*[((X*D)"2+D"2)"0.5] <br />R=AREAANETTED PERIMETER <br />V=(1.49/N)*(R".667)*(S".5)= <br />Q=AXV= <br />Q REQUIRED - Peak Discharge <br />Flume Outlet Channel <br />Manning's Equation <br />Flow In a Triangular Channel <br />3.65 FEET"2 <br />5.35 FEET <br />0.68 <br />15.37 FT/SEC <br />56.06 CFS <br />55.59 CFS <br />Depth <br />D <br />0.87 <br />Feet <br />Width <br />W <br />3 <br />Feet <br />Slope <br />S <br />0.5 <br />Express as Decimal <br />Mannings "N" <br />N <br />0.055 <br />Express as Decimal <br />Side Slope <br />X <br />2 <br />Slope = X:1 <br />AREA=(W*D)+(X*D"2)= <br />WETTED PERIMETER=(W)+2*[((X*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 />Riprap Sizing - Flume Outlet Channel <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 />4.12 FEET "2 <br />6.89 FEET <br />0.60 <br />13.60 FT/SEC <br />56.10 CFS <br />55.59 CFS <br />D50 = 2.54 feet 31 inches Use 6" to 18" Rock <br />TR -81 App. B-9 10/13 <br />