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Stormwater calculations
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Last modified
4/16/2026 2:53:19 PM
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4/16/2026 2:52:57 PM
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I <br />Hydrograph Report <br />Hyd. No. 8 <br />PRE: AREA 3 <br />Hydrograph type <br />Storm frequency <br />Drainage area <br />Basin Slope <br />Tc method <br />Total precip. <br />Storm duration <br />= SCS Runoff <br />= 10 yrs <br />= 5.34 ac <br />= 3.2 % <br />= LAG <br />= 4.15 in <br />= 24 hrs <br />Hydrograph Discharge Table <br />Time -- Outflow <br />(hrs cfs) <br />12.00 <br />2.09 <br />12.10 <br />3.18 <br />12.20 <br />3.53 << <br />12.30 <br />3.12 <br />12.40 <br />2.60 <br />12.50 <br />1.99 <br />End <br />Page 1 <br />English <br />Peak discharge <br />3.53 cfs <br />Time interval = <br />6 min <br />Curve number = <br />61 <br />Hydraulic length = <br />720 ft <br />Time of conc. (Tc) = <br />23.1 min <br />Distribution = <br />Type 11 <br />Shape factor = <br />484 <br />Total Volume = 17,249 cult <br />
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