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SEDIMENT VOLUME -Pond 8 <br />Use the universal soil loss equation. <br />A=RKLSCP <br />R =rainfall factor 20.00 <br />K =soil erodibility factor 0.25 <br />LS =combined length slope factor 3.50 <br />Used f0%, 700' (E2-E2) <br />C =cropping management factor 0.30 <br />P =erosion control practice factor 1.00 <br />A =sediment, tons/acre/year 5.25 <br />Three Year Sediment Volume -Acre-Feet 0.22 <br />34.96 ACRES - 115 #/CF <br />Total Required Sediment Pond Capacity -Acre-Feet 0.90 <br />PEAK FLOW CALCULATIONS <br />The following peak flow calculations were compiled with the computer program SEDCAD <br />version 4.0. Details of the runoff calculations are shown on the following pages. <br />10-YR 25-YR <br />24 HR 24 HR <br />Event Event <br />Pond 8 Drainage <br />Spillway Pond 8 <br />6.04 11.55 <br />Manning's Equation <br />i• <br />Flow In a Trapezoidal Channel <br />DEPTH D 0.25 FEET <br />WIDTH W 20 FEET <br />Slope S 0.02 EXPRESS AS DECIMAL <br />Mannings "N" N 0.03 EXPRESS AS DECIMAL <br />SIDE SLOPE X 5 SLOPE = X:1 <br />SCC <br />RSS-2 <br />07/06 <br />