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Worksheet 3: Time of concentration (7'c) or travel time (Tt) <br />Prgect: CYPRUS <br />Lorahon: RouO County, Cdoratlo <br />Contlibon Histodc <br />CalaWhons roc Tc <br />NOTES <br />Sheet Flmv lAnnlicable to Te onFvl <br />1. Surtace description (fable }1) ................................................. <br />2. Manninp's mugnness coert., n (fade }1) ................................. <br />3. Flow length. L (total L <= 300 R) ............................................. <br />~ Two-yr 2a-hr rainfall. P2 ........................................................... <br />5 Lentl slope, s ....................................................................... <br />B Tr10007 (nL)"(0.6)y1P2•(0.5)a•(0 ~)) Compute TL .............. <br />Shallo~c c~ncenL sled ftow~ <br />7. Surtace desrnpbon (pave0 ar unpevetlJ ........................................... <br />8. Fbw length. L .......................................................................... <br />D Watercourse slope. e ................................................................ <br />70 Average valoary, V (figure }t) ......................................... <br />11. n = U(7600 V) Compute TL .............................. <br />Segment II <br />Spment ID <br />Segment lD <br />IJy: TLM <br />Checked:LR <br />rca+aa+t:rsxLs <br />fl <br />fUfl <br />fVs <br />hr <br />Date: 4/I IN7 <br />Date: 4/11/97 <br />0.25 <br />I 2 <br />unpaved unpaved <br />790 924 <br />0.101 0.0866 <br />5.13 4.75 <br />0.043 0.054 0.10 <br />7. Sudace dewipuon (pavetl ar unpaved) ........................................... <br />0 Fbw krgih. L ............................................................................ ft <br />D WaleltOUraB slope. a .............................._............................... fl/ft <br />10. Average vebtlly. V (rpurp }1) ......................................... ftls <br />,,. n = u(aeoo h Caroula n ............................... hr 0.00 <br />Charnel OoH• <br />1 Z Cross aecGpfal Ilow area. e <br />1J. Welled pmmeler, pw.......... <br />1a. Hydraulic ndms, r °a/P•' Cartprb c ................................. <br />15. Channel slope. s ....................................................................... <br />1B. Manninp's nxighnas coell, n ........................................................ <br />17. V = (1AD r•(7!!) a•(t!1)Nrl Corrpula V ............................. <br />10 Fbw kngtt'. L ........................................_................................. <br />1 D n = uncoo v) ConwM n ............................... <br />Segment lD <br />R^: <br />f <br />P <br />NB <br />3.00 <br />104.00 <br />69.70 <br />1.49 <br />0.0303 <br />0.04 <br />10.91 <br />1490 <br />0.04 0.04 <br />Z(I. Watershed a wbarea Tc ar n (add n b aOeM B, 1 t, arM 1 <br />fl/e <br />B <br />ht <br />0.38 <br />(210.VI-7-R-SS, Second Ed., June 1986) D3 <br />