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Gross Erosion, E (tons /acre /year) : Calculated from the above defined parameters for each <br />area defined. If the user selects an area from screen, E is calculated in each grid and the <br />cumulative value is calculated. <br />E = R « K « Ls « C « P , where all the parameters are as defined above <br />Volume Calculations : <br />Required User Input <br />Sediment Delivery Ratio (DR) : Default = 0.37 <br />Time Period,T (years) : Time of analysis; typically the time of the storm event <br />Density of the sediment (D) : The post- deposit density of the sediment <br />Runoff (1) : Calculated from some other routine like Curve Number and Runoff <br />Total Erosion (E, tons /year) = Sum of (E « Area) for all the areas. <br />Total Yield (Y, tons /year) = E « DR <br />Sediment volume per year (Vs) = Y / Density <br />Total Sediment Volume = Vs « Time period <br />Runoff Volume = Runoff (1) « Total Area <br />Total Pond Volume = Runoff Volume + Total Sediment Volume <br />Pond 008 was constructed in the fall of 2000. Pond 009 was excavated in the spring of <br />2002. Ponds 011 through 013 have not yet been constructed. Accordingly, the values for <br />Ponds 008 and 009 are as- builts, and those values for Ponds 011 through 013 are as- <br />designed. Map 2.05.3(3) -6 -1 shows the detailed plan views and cross - sections for ponds <br />012 and 013. All ponds will utilize a key cut into the dam and seep collars on the principal <br />spillway pipe as shown on the map. All dams will have a minimum combined slope of 5.0:1.0 <br />and will be compacted in no greater than 8" lifts to 90% of the tested maximum dry density of <br />the material. <br />Revised June 2010 (PR06) 2.05.3(3) -19 <br />