Laserfiche WebLink
Gross Erosion, E (tons/acre/year): Calculated from the above defined parameters for each area <br /> defined. If the user selects an area from screen, E is calculated in each grid and the cumulative <br /> value is calculated. <br /> E= R * K * Ls * C * P, where all the parameters are as defined above <br /> Volume Calculations: <br /> ---------------------- <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 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(I) * Total Area <br /> Total Pond Volume = Runoff Volume + Total Sediment Volume <br /> Pond 009 was excavated in the spring of 2002.Pond 012 was excavated in spring 2005. Ponds 011 <br /> and 013 were constructed in late 2007,while Pond 011 was reclaimed in Fall 2015. Pond 015 was <br /> constructed in 2011. Finally, Ponds 016 and 018 were constructed in late 2016. Accordingly, the <br /> values for Ponds 009, 012, 013, 015, 016, and 018 are as-built. All ponds except for Pond 018 will <br /> utilize a key cut into the dam and anti-seep collars on the principal spillway pipe as shown on the <br /> map. All dams will have a minimum combined slope of 5.OH:1.OV, with the exception of Pond <br /> 015, which was excavated near solid rock and the embankment side is steeper than 5H:1 V. <br /> Section 2.05.3(3) Page 9 July 2020 (TR-99) <br />