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Hydrograph Report <br />Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Monday, 01 / 20 / 2025 <br />Hyd. No. 3 <br />20-Acre Basin <br />Hydrograph type = Rational Peak discharge = 39.40 cfs <br />Storm frequency = 10 yrs Time to peak = 3 min <br />Time interval = 1 min Hyd. volume = 0.163 acft <br />Drainage area = 20.000 ac Runoff coeff. = 0.25 <br />Intensity = 7.880 in/hr Tc by TR55 = 3.00 min <br />IDF Curve = SampleFHA.idf Asc/Rec limb fact = 1/1 <br />6 <br />0 1 2 3 4 5 6 <br />Q (cfs) <br />0.00 0.00 <br />10.00 10.00 <br />20.00 20.00 <br />30.00 30.00 <br />40.00 40.00 <br />Q (cfs) <br />Time (min) <br />20-Acre Basin <br />Hyd. No. 3 -- 10 Year <br />Hyd No. 3