----------------------------------------------------------------------------------------- <br /> - 3305.97 - 0.72 <br /> Composite Area & Weighted Runoff Coeff. 3305.97 0.72 <br /> <br /> -------------------- <br /> Subbasin BASIN-S3 <br /> -------------------- <br /> Area Soil Runoff <br /> Soil/Surface Description (ft²) Group Coeff. <br /> ----------------------------------------------------------------------------------------- <br /> - 4297.00 - 0.72 <br /> Composite Area & Weighted Runoff Coeff. 4297.00 0.72 <br /> <br /> -------------------- <br /> Subbasin BASIN-S4 <br /> -------------------- <br /> Area Soil Runoff <br /> Soil/Surface Description (ft²) Group Coeff. <br /> ----------------------------------------------------------------------------------------- <br /> - 4911.98 - 0.72 <br /> Composite Area & Weighted Runoff Coeff. 4911.98 0.72 <br /> <br /> -------------------- <br /> Subbasin BASIN-S5 <br /> -------------------- <br /> Area Soil Runoff <br /> Soil/Surface Description (ft²) Group Coeff. <br /> ----------------------------------------------------------------------------------------- <br /> - 3194.98 - 0.72 <br /> Composite Area & Weighted Runoff Coeff. 3194.98 0.72 <br /> <br /> -------------------- <br /> Subbasin BASIN-S6 <br /> -------------------- <br /> Area Soil Runoff <br /> Soil/Surface Description (ft²) Group Coeff. <br /> ----------------------------------------------------------------------------------------- <br /> - 8252.97 - 0.72 <br /> Composite Area & Weighted Runoff Coeff. 8252.97 0.72 <br /> <br /> ------------------ <br /> Subbasin Uphill <br /> ------------------ <br /> Area Soil Runoff <br /> Soil/Surface Description (ft²) Group Coeff. <br /> ----------------------------------------------------------------------------------------- <br /> - 82747.68 - 0.72 <br /> Composite Area & Weighted Runoff Coeff. 82747.68 0.72 <br /> <br /> <br /> *************************************************** <br /> SCS TR-55 Time of Concentration Computations Report <br /> *************************************************** <br /> <br /> Sheet Flow Equation <br /> ------------------- <br /> <br /> Tc = (0.007 * ((n * Lf)^0.8)) / ((P^0.5) * (Sf^0.4)) <br /> <br /> Where: <br /> <br /> Tc = Time of Concentration (hrs) <br /> n = Manning's Roughness <br /> Lf = Flow Length (ft) <br /> P = 2 yr, 24 hr Rainfall (inches) <br /> Sf = Slope (ft/ft) <br /> <br />Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis