Braewood Hills Runoff Detention <br />2-Year Storm <br />Post-development <br /> 12/18/2023 <br /> Subbasin : BasinL1 <br /> Input Data <br />Area (ft²) ......................................................................... 149535.99 <br />Impervious Area (%) ...................................................... 20.00 <br />Impervious Area Curve Number .................................... 98.00 <br />Pervious Area Curve Number ........................................ 76.00 <br />Rain Gage ID ................................................................. 2-Year <br /> Composite Curve Number <br /> Area Soil Curve <br />Soil/Surface Description (ft²) Group Number <br />Composite Area & Weighted CN 149535.99 80.4 <br /> Time of Concentration <br />Subarea Subarea Subarea <br />Sheet Flow Computations A B C <br /> Manning's Roughness : .4 0.00 0.00 <br /> Flow Length (ft) : 260 0.00 0.00 <br /> Slope (%) : 25 0.00 0.00 <br /> 2 yr, 24 hr Rainfall (in) : 3.2 0.00 0.00 <br /> Velocity (ft/sec) : 0.26 0.00 0.00 <br /> Computed Flow Time (min) : 16.79 0.00 0.00 <br />Subarea Subarea Subarea <br />Shallow Concentrated Flow Computations A B C <br /> Flow Length (ft) : 280 0.00 0.00 <br /> Slope (%) : 5 0.00 0.00 <br /> Surface Type : Grassed waterway Unpaved Unpaved <br /> Velocity (ft/sec) : 3.35 0.00 0.00 <br /> Computed Flow Time (min) : 1.39 0.00 0.00 <br />Total TOC (min) ..................18.19 <br /> Subbasin Runoff Results <br />Total Rainfall (in) ............................................................ 3.11 <br />Total Runoff (in) ............................................................. 1.44 <br />Peak Runoff (cfs) ........................................................... 0.87 <br />Weighted Curve Number ............................................... 80.40 <br />Time of Concentration (days hh:mm:ss) ........................ 0 00:18:11