Laserfiche WebLink
SOUTHFIELD COAL MINE <br />CALCULATED SEDIMENTOLOGY DATA <br />POST MINE LOADOUT <br />R FACTOR <br />P 2,6 R <br />(in) I (Annual) <br />1.2 1 24.7 <br />R = 16.55 TZI) 2.2 <br />SOIL EROD/BILITYFACTOR <br />SLOPE FACTOR: <br />Length <br />(ft) <br />Slope <br />( %) <br />Soil Type <br />Erodibility <br />LS <br />Factor <br />Factor, K <br />Clay Loam <br />0.32 <br />SLOPE FACTOR: <br />Length <br />(ft) <br />Slope <br />( %) <br />m <br />Slope <br />Angle <br />(deg) <br />LS <br />Factor <br />120 <br />8.0% <br />0.5 <br />4.6 <br />1.15 <br />125 <br />12.0% <br />0.6 <br />6.8 <br />2.08 <br />360 <br />3.0% <br />0.3 <br />1.7 <br />0.57 <br />4001 <br />8.0%1 <br />0.51 <br />4.6 <br />2.09 <br />Average LS = 1.47 <br />The LS Factor was calculated by. <br />LS = (Slope Lengfh172.6) ^m'(10.8`sin(s1ope angle) + 0.03) for Slopes < 9% <br />LS = (Slope Length172.6)^m'(16.8`sin(s1ope angle) - 0.5) for Slopes > 9% <br />Where: <br />Slope < 3% m = 0.3 <br />Slope = 4% m = 0.4 <br />5% > Slope < 10% m = 0.5 <br />Slope > 10% m = 0.6 <br />COVER AND PRACTICE FACTORS: <br />Cover <br />Cover <br />Canopy <br />Cover <br />Practice <br />Type <br />Factor, C <br />Factor, P <br />Pre Mine Estimate <br />51% <br />0% <br />0.07 <br />0.80 <br />ANNUAL SEDIMENT YIELD <br />The following spreadsheet calculates the predicted sediment yield for the project area. The gross sediment yield <br />is determined according to the Revised Universal Soil Loss Equation. <br />PARAMETER DESCRIPTION VALUE <br />Annual Rainfall Factor 24.72 <br />Soil Erodibility Factor 0.32 <br />Length Slope Factor 1.47 <br />Cover Factor 0.07 <br />Practice Factor 0.80 <br />Gross Annual Sediment Yield 0.65 tons /acre /year <br />