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• 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 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 (I) :Calculated from some other routine like Curve Number and Runoff <br />Total Erosion (E, tons/year} =Sum of (E "Area) for atl 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 (I) * 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. Pond 014 was excavated in the spring of 2004. Ponds 010 through 013 have not yet <br />been constructed. Accordingly, the values for Ponds 008 and 009 are as-builts, and those <br />values for Ponds 010 through 013 are as-designed. Map 2.05.3(3)-6-1 shows the detailed <br />plan views and cross-sections for ponds 010, 012 and 013. All ponds will utilize a key cut <br />into the dam and seep collars on the principal spillway pipe as shown on the map. All dams <br />• <br />(Revised July 2006) 2.05.3{3)-24 <br />