V4 11 Stormwater Report Rev 3 1 26 2023

29 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Friday, 01 / 27 / 2023 Hyd. No. 15 DA-1A (Courtyard Pervious) Hydrograph type = SCS Runoff Peak discharge = 0.048 cfs Storm frequency = 2 yrs Time to peak = 12.10 hrs Time interval = 3 min Hyd. volume = 162 cuft Drainage area = 0.030 ac Curve number = 80 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 7.50 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 DA-1A (Courtyard Pervious) Q (cfs) Q (cfs) Hyd. No. 15 -- 2 Year 0.10 0.10 0.09 0.09 0.08 0.08 0.07 0.07 0.06 0.06 0.05 0.05 0.04 0.04 0.03

0.04 0.03 0.03 0.02 0.02 0.01 0.01 0.00 0.00 0 3 6 9 12 15 18 21 24 27 Time (hrs) Hyd No. 15