Laserfiche WebLink
• Trapezoidal Channel in C-Gulch <br />Riprap Sizing -Trapezoidal Channels C2, & C4 <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 = 2.0-feet 24-inches <br />Drainage channels C2, & C4 will be constructed at least 3-feet wide at the bottom with 2H:1 V <br />side slopes, 2-feet deep including freeboard with D50 riprap of 24-inches. <br />Drainage Ditches C6, C9, C10 & C14 <br />Manning's Equation <br />Flow In a Trapezoidal Channel -Minimum Slope <br />DEPTH D 0.8 FEET <br />WIDTH W 6.0 FEET <br />• <br />Slope S 0.05 EXPRESS AS DECIMAL <br />Mannings 'N" N 0.04 EXPRESS AS DECIMAL <br />SIDE SLOPE X 2.0 SLOPE = X:I <br />AREA=(W*D)+(X•D^2)= 6.08 FEET^2 <br />WETTED PERIMETER=(VV) +2•[((X*D)^2+D^2)^0.5] 9.58 FEET <br />R=AREA/WETTED PERIMETER 0.63 <br />V=(1.49/N)*(R^.667)*(S^.5)= <br />6.15 FT/SEC <br />Q=AXV= 37.41 CFS <br />Q REQUIRED -Peak Dischazge - C14 34 CFS <br />r1 <br />L J <br />PR-03 EXH-8 -]8 - 5/99 <br />