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Note : The following values are to be entered by the user for each area <br />in the watershed. The method for obtaining these parameters is left to the user. <br />Rainfall Factor (R) : Default = 50; <br />Erodability Factor (K) : Default = 0.37 <br />C Factor (C) : Default = 0.5 <br />P Factor (P) : Default = 1.0 <br />Geometric Information <br />Area (sq units) : Can be entered by the user or the program calculates <br />the area of a user - selected closed polyline. The user also has the option <br />to enter the area in different units. <br />Slope, S ( %) : Can be entered by the user or the program calculates <br />the slope when the user selects an area from the screen. <br />Length (L) : Can be entered by the user. If the user selects an area from the screen, <br />the length is not calculated since the Gross Erosion is directly calculated. <br />Topographical Factor (Ls) : Will be calculated from Length (L) and the Slope (S), <br />only when these values are entered by the user directly, as against calculated <br />by the program from the screen. In the second case, the value of Ls is calculated <br />for individual grids and not for the entire area. <br />Ls = (U72.6) ^m * ((430 *S ^2 + 30 *S + 0.43)/(6.613 <br />where L and S are defined above and <br />m = 0.5 if S = >5 %; = 0.3 if S <= 3% ; = 0.4 otherwise. <br />Gross Erosion, E (tons /acre /year) : Calculated from the above defined parameters <br />for each area defined. If the user selects an area from screen, E is calculated <br />in each grid and the cumulative value is calculated. <br />E = R * K * Ls * C * P , where all the parameters are as defined above <br />Volume Calculations: <br />---------------------- <br />---------------------- <br />Required User Input <br />Sediment Delivery Ratio (DR) : Default = 0.37 <br />X: \Western Fuels Nucla\Pennit Revision 2009\Adequacy Response #]\Final Files\ATTACHMENT 2.05.3(3 )-14 POND 011 AS -BUILT <br />28JAN10 DRAFT."d <br />Attachment 2.05.3(3) -14 -6 <br />