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• <br /> <br />• <br />RIPRAP SIZING -EMERGENCY SPILLWAY -POND 2 <br />DSO = SIZE OF RIPRAP <br />D50 = ((V X S".17)/7.58))"2 <br />DSO = DIAMETER IN FEET <br />V = VELOCITY <br />S =SLOPE <br />D50 = 0.95 FEET <br />SPILLWAY POND 2 <br />11,4 INCHES <br />DETERMINE FLOW VELOCITY ACROSS 2% EMBANKMENT <br />EMBANKMENT SPILLWAY <br />MANNING'S EQUATION <br />FLOW N 4 TRAPEZOIDAL CHANNEL <br />DEPTH D 0.530 <br />WIDTH W 4.000 <br />SLOPE S 0.020 <br />MANNINGS "N" N 0.040 <br />SIDE SLOPE X 2.000 <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 />a=Axv= <br />O REQUIRED -PEAK DISCHARGE <br />SEDIMENT POND 2 <br />RIPRAP SIZING - ACROSS TOP OF EMBANKMENT - POND 2 <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 = <br />VOI 8A -Tab Pond Volumes <br />FEET <br />FEET <br />EXPRESS AS DECIMAL <br />EXPRESS AS DECIMAL <br />SLOPE = X:I <br />2.68 FEET"2 <br />6.37 FEET <br />0.42 <br />2.96 FT/SEC <br />7.94 CFS <br />7.76 CFS <br />0.0 FEET O INCHES NONE REQUIRED <br />7!_'3 7 <br />W-4- 10~3~01 <br />9101 <br />