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<br />I 1 <br />SEDIMENT VOLUME -POND 2 <br />A=RKLSCP <br />R =RAINFALL FACTOR <br />K =SOIL ERODIBILITY FACTOR - DELSON SOIL <br />LS =COMBINED LENGTH SLOPE FACTOR 1200' - 25% <br />C =CROPPING MANAGEMENT FACTOR <br />P =EROSION CONTROL PRACTICE FACTOR <br />A =SEDIMENT, TONS/ACRE/YEAR <br />THREE YEAR SEDIMENT VOLUME -ACRE FEET <br />26.05 ACRES - IIS #/CF <br />TOTAL REDUIRED SEDIMENT POND CAPACITY -- AF <br />POND W-1,2 CAPACITIES (ACRE-FEET) <br />WATER SEDIMENT TOTAL <br />DESIGN 1.07 0.42 1.49 <br />REQUIRED 0.96 0.42 1.38 <br />POND W-2 DOES NOT ADEQUATELY CONTAIN THE 0-YEAR EVENT, BUT 4NY OVERFLOW <br />WILL BE DIRECTED TO AND CONTAINED IN POND W-I WHICH HAS THE EXCESS CAPACITY <br />AVAILABLE TO CONTAIN OVERFLOW FROM POND W-2. <br />30.00 FIGURE 2 <br />O.IS HARNER 8 ASSOC.. DELSON STONY LOAM <br />20.00 FIGURE 4 <br />O,IO FIGURE 7 <br />.OO FIGURE 10 <br />9.00 <br />0.281 <br />0.758 <br />POND 2 EMERGENCY SPILLWAY <br />MANNING'S EODATION <br />FLOW IN A TRAPEZOIDAL CHANNEL <br />• <br />DEPTH D 0.200 FEET <br />WIDTH W L.000 FEET <br />SLOPE S 0.320 EXPRESS AS DECIMAL <br />MANNING$"N" N 0.030 EXPRESS AS DECIMAL <br />SIDE SLOPE X 2.000 SLOPE = X:I <br />AREA=(W"D)+(X"D"2)= 0.88 FEET'2 <br />WETTED PERIMETER=(W)+2*[((X•D )"2+D"2)'0.5] 4.89 FEET <br />R=AREA/WETTED PERIMETER 0.18 <br />V=(1.49/N)•(R".667)•(S".5)= 8.95 FT/SEC <br />Q=AXV= 7.88 CFS <br />D REQUIRED -PEAK DISCHARGE 7.76 CFS <br />Tle-37 <br />Vol 8A -Tab Pond Volumes W - 3 - /o~ 3/0 1 <br />sioi <br />