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SEDIMENT VOLUME -Pond K <br />s <br />I~ <br />A=RKLSCP <br />R =rainfall factor 30.00 <br />K =soil erodibility factor -Work soil 0.37 <br />LS =combined length slope factor 1200' - 4% 1.00 <br />C =cropping management factor 1.00 <br />P =erosion control practice factor 1.00 <br />A =sediment, tons/acre/year 11.10 <br />THREE YEAR SEDIMENT VOLUME -ACRE FEET 0.101 <br />7.56 ACRES - 115 #/CF <br />TOTAL REQUIRED SEDIMENT POND CAPACITY--AF 0.496 <br />Pond K Emergency Spillway <br />Manning's Equation <br />Flow In a Trapezoidal Channel <br />DEPTH D 0.600 FEET <br />WIDTH W 2.000 FEET <br />Slope S 0.020 EXPRESS AS DECIMAL <br />Mannings "N" N 0.030 EXPRESS AS DECIMAL <br />SIDE SLOPE X 2.000 SLOPE = X:1 <br />AREA=(W*D)+(X*D^2p <br />WETTED PERIMETER=(W)+2•(((X'Dr2+D^2)^O.SJ <br />R=AREA/WETTED PERIMETER <br />V=(1.49/N)*(R^.667)*(S^.5p <br />Q=AXV= <br />Q REQUIRED -Peak Discharge <br />Riprap Sizing -Across top of Embankment -Pond K <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 = 0.07 feet 0,8 inches <br />PR-07 <br />Exh-8 - 166 - <br />1.92 FEET^2 <br />4.68 FEET <br />0.41 <br />3.88 FT/SEC <br />7.44 CFS <br />5.92 CFS <br />None Required <br />2/03 <br />