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<br />WEST BASIN <br />WE<IBASrMCONNOCNANNELS XIS <br />Worksheet 3: Time of concentration (Tc) or travel time (Tt) <br />Pmjeci CYPRESS 20 MILE <br />LODalion~ Rou11 Count', Caaado <br />l;agiliott. Oevebped <br />Glauems br Tc <br />NOTES. <br />Sheet Flow~lAnnlic+hlr~n Tc onlv0 Segment I[ <br />1. Surface descripaon (table }7) ...................................................._.. <br />2. Manninp's roughness coeR., n (table }1) .......................................... <br />3. Fbw knpth. L (total L <= 300 RI ..................................................... <br />4. Two-yr 2~-hr reinhall. P2 ................................................................... <br />S. Lend slope, s .................................................................................... <br />8. Tt+I0.007 (ny"(0 6)NP2•(0.5) f"(0.4)] CompNe TI ............. <br />Shallmc rnncenLrnted nmr <br />7. Surface deaviption (psved a unpaved) ...................... <br />9 Fbw knpth. L ...................._....................................... <br />a Waercourse abpe. s.........._ ....................................... <br />t0. Average velodry, V (npure 3-1) .................................... <br />t 1. n = u(3coo h Comµne n..... <br />Shallow ~n ~n ruled Onw' (con in redl <br />7. Surtace dnaiplion (paved a unpaved) .......................................... <br />a. Fbw MgOL L ............................................................................. <br />a. Watercourse slope. s .................................................._........... <br />70. Average vebciy, V ((pure }7) ......................................... <br />11. n ~ v(3eao w CompM n...._ ......................... <br />Sepnknt lD <br />f <br />R/f <br />N: <br />h <br />Saprnenl lD <br />f <br />fl/f <br />fU! <br />h~ <br />Channel now EaprrrMd IC <br />71. Gws semonel Oow area.. ................................................. <br />13. waned perimeter. pw ..............................._.................._......... <br />1s. Hydraulic radius. r ~alpw CDDWrrle r .................................. <br />15. Channel slope. a ...................................................................... <br />1e. Manninp's roughness [Dell., n ....................................... ................ <br />17. v = (1 Ig r(tnl e•(t21Vn l.artiprrEe v .............................. <br />18 Fbw krgtlr. L ..........................................._................._............. <br />1a. Tt • U(3e00 V) CDrrouk n ............................_. <br />20. Welerslred a wberea Tc a TI (Wtl T in steps e, 11. arM fa) ............. <br />h O.S4 <br />(210-V I-TR•S5, Second Ed., Iune 1986) DS <br />9y:TPr <br />Checked: LR <br />Date: 4/8/97 <br />Date: 4/8/97 <br />0.15 <br />N'SI K'S2 WS3 WS4 <br />wpaved unpavcd wpaved wpaved <br />327 1,350 867 643 <br />0.107 0.1296 0.1153 0.0771 <br />3.28 5.81 5.48 4.48 <br />0.017 0.065 0.044 0.052 0.18 <br />WCSS WCS6 WCS7 WCSS <br />w sued wpaved w sued wpaved <br />676 670 1485 SIB <br />0.0962 0.1119 0.0673 0.0463 <br />3.00 3.40 4.19 3.55 <br />0.038 0.034 0.099 0.041 0.21 <br />