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TR55 Tc Worksheet <br />Hydraflow Hydrographs Extension for AutoCAD® Civil 3D@2013 by Autodesk, Inc. v10 <br />Hyd. No. 2 <br />Basin B <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 />= 12.32 <br />0.00 <br />0.00 <br />Travel Time (min) <br />= 7.30 + <br />0.00 + <br />0.00 = <br />7.30 <br />Shallow Concentrated Flow <br />Flow length (ft) <br />= 105.00 <br />0.00 <br />0.00 <br />Watercourse slope ( %) <br />= 6.86 <br />0.00 <br />0.00 <br />Surface description <br />= Unpaved <br />Paved <br />Paved <br />Average velocity (ft/s) <br />=4.23 <br />0.00 <br />0.00 <br />Travel Time (min) <br />= 0.41 + <br />0.00 + <br />0.00 = <br />0.41 <br />Channel Flow <br />X sectional flow area (sqft) <br />= 6.00 <br />0.00 <br />0.00 <br />Wetted perimeter (ft) <br />= 6.32 <br />0.00 <br />0.00 <br />Channel slope ( %) <br />= 3.20 <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 />=10.30 <br />0.00 <br />0.00 <br />Flow length (ft) <br />( {0 })752.0 <br />0.0 <br />0.0 <br />Travel Time (min) <br />= 1.22 + <br />0.00 + <br />0.00 = <br />1.22 <br />Total Travel Time, Tc ............................................... <br />............................... <br />8.90 min <br />