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TR55 Tc Worksheet <br />Hydraflow Hydrographs Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc. v10 <br />Hyd. No. 4 <br />Basin OS2 <br />Description <br />A <br />B <br />C <br />Totals <br />Sheet Flow <br />Manning's n -value <br />= 0.130 <br />0.011 <br />0.011 <br />Flow length (ft) <br />= 100.0 <br />0.0 <br />0.0 <br />Two -year 24 -hr precip. (in) <br />= 1.07 <br />0.00 <br />0.00 <br />Land slope ( %) <br />= 2.70 <br />0.00 <br />0.00 <br />Travel Time (min) <br />= 13.40 + <br />0.00 + <br />0.00 = <br />13.40 <br />Shallow Concentrated Flow <br />Flow length (ft) <br />= 1219.00 <br />0.00 <br />0.00 <br />Watercourse slope ( %) <br />= 5.36 <br />0.00 <br />0.00 <br />Surface description <br />= Unpaved <br />Paved <br />Paved <br />Average velocity (ft/s) <br />=3.74 <br />0.00 <br />0.00 <br />Travel Time (min) <br />= 5.44 + <br />0.00 + <br />0.00 = <br />5.44 <br />Channel Flow <br />X sectional flow area (sqft) <br />= 8.00 <br />0.00 <br />0.00 <br />Wetted perimeter (ft) <br />= 4.48 <br />0.00 <br />0.00 <br />Channel slope ( %) <br />= 3.34 <br />0.00 <br />0.00 <br />Manning's n -value <br />= 0.025 <br />0.015 <br />0.015 <br />Velocity (ft/s) <br />=16.06 <br />0.00 <br />0.00 <br />Flow length (ft) <br />( {0 })0.0 <br />0.0 <br />0.0 <br />Travel Time (min) <br />= 0.00 + <br />0.00 + <br />0.00 = <br />0.00 <br />Total Travel Time, Tc ............................................... <br />............................... <br />18.80 min <br />