V4 11 Stormwater Report Rev 3 1 26 2023

20 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Wednesday, 11 / 2 / 2022 Hyd. No. 10 DA-4 (Pervious) Hydrograph type = SCS Runoff Peak discharge = 1.365 cfs Storm frequency = 2 yrs Time to peak = 12.10 hrs Time interval = 3 min Hyd. volume = 4,731 cuft Drainage area = 1.220 ac Curve number = 73* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 9.60 min Total precip. = 3.44 in Distribution = Custom Storm duration = S:\Petry Engineering Cad Projects\2019\19 Shape factor 0265 Daughters = 484 of Israel - West Oran * Composite (Area/CN) = [(1.060 x 80) + (0.160 x 30)] / 1.220 DA-4 (Pervious) Q (cfs) Q (cfs) Hyd. No. 10 -- 2 Year 2.00 2.00 1.00 1.00 0.00 0.00 0 3 6 9 12 15 18 21 24 27 Time (hrs) Hyd No. 10