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TR55 Tc Worksheet <br />Hydraflow Hydrographs by Intelisolve <br />a � <br />Hyd. N®. 2 <br />OS2 <br />Description <br />A <br />B <br />C <br />Totals <br />Sheet Flow <br />Manning's n -value <br />= 0.350 <br />0.011 <br />0.011 <br />Flow length (ft) <br />= 300.0 <br />0.0 <br />0.0 <br />Two -year 24 -hr precip. (in) <br />= 0.70 <br />0.00 <br />0.00 <br />Land slope ( %) <br />= 13.00 <br />0.00 <br />0.00 <br />Travel Time (min) <br />= 47.00 + <br />0.00 + <br />0.00 = <br />47.00 <br />Shallow Concentrated Flow <br />Flow length (ft) <br />= 1762.00 <br />0.00 <br />0.00 <br />Watercourse slope ( %) <br />= 11.40 <br />0.00 <br />0.00 <br />Surface description <br />= Unpaved <br />Paved <br />Paved <br />Average velocity (ft/s) <br />= 5.45 <br />0.00 <br />0.00 <br />Travel Time (min) <br />= 5.39 + <br />0.00 + <br />0.00 = <br />5.39 <br />Channel Flow <br />X sectional flow area (sqft) <br />= 21.60 <br />0.00 <br />0.00 <br />Wetted perimeter (ft) <br />= 21.97 <br />0.00 <br />0.00 <br />Channel slope ( %) <br />= 9.70 <br />0.00 <br />0.00 <br />Manning's n -value <br />= 0.045 <br />0.015 <br />0.015 <br />Velocity (ft/s) <br />= 10.20 <br />0.00 <br />0.00 <br />Flow length (ft) <br />= 2879.0 <br />0.0 <br />0.0 <br />Travel Time (min) <br />= 4.71 + <br />0.00 + <br />0.00 - <br />4.71 <br />Total Travel Time, Tc ..................... ............................... .......................... <br />57.09 min <br />