V4 11 Stormwater Report Rev 3 1 26 2023

15 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Wednesday, 11 / 2 / 2022 Hyd. No. 7 DA-3 (Pervious) Hydrograph type = SCS Runoff Peak discharge = 1.361 cfs Storm frequency = 2 yrs Time to peak = 12.15 hrs Time interval = 3 min Hyd. volume = 6,384 cuft Drainage area = 2.440 ac Curve number = 65* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 10.50 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) = [(0.890 x 80) + (0.210 x 74) + (0.550 x 30) + (0.760 x 70) + (0.030 x 77)] / 2.440 DA-3 (Pervious) Q (cfs) Q (cfs) Hyd. No. 7 -- 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. 7