V4 11 Stormwater Report Rev 3 1 26 2023

6 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Wednesday, 11 / 2 / 2022 Hyd. No. 2 DA-1A (Pervious) Hydrograph type = SCS Runoff Peak discharge = 4.032 cfs Storm frequency = 2 yrs Time to peak = 12.15 hrs Time interval = 3 min Hyd. volume = 18,052 cuft Drainage area = 6.090 ac Curve number = 67* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 14.30 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) = [(0.500 x 30) + (4.740 x 70) + (0.280 x 77) + (0.010 x 80) + (0.560 x 74)] / 6.090 DA-1A (Pervious) Q (cfs) Q (cfs) Hyd. No. 2 -- 2 Year 5.00 5.00 4.00 4.00 3.00 3.00 2.00 2.00 1.00 1.00 0.00

1.00 0.00 0.00 0 3 6 9 12 15 18 21 24 27 Time (hrs) Hyd No. 2