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/lood StuJ~ci <br />71 <br />• G. ESTIrv1ATING Tc FF01.t LENGTHS :.ND SLOPES <br /> (o) NOmDgrDpn (SCS Guide) <br />-T , o <br />~ ,o L = length Of IC ngest water- <br />"-ro ~ e course ~n feet <br />i <br />s;oDC-, <br />s <br />H = tl,flerence in elevation .n leer <br />~ zo between cutler point onD a~v,tle <br /> ~ <br /> 7 <br />JO <br /> x IblSoiut,on mDy De m„d2 Dy e:,JCtiCn <br />~ w .o from Cei,fb-n~o Culverts <br />. cC, L PrOC t,Ce ,GolifOrniO Niq nwtlys <br />e PO^-f o <br />~ 60 Ond PUDt~C WOrks, SCptem Der <br /> 6 <br />:. 6 :JJ -~ <br />_ <br />eo v <br /> ~- ~ T <br />J <br />. roo ~ 1 <br />J <br />x = <br />J 00~ T t Tc ,n Hours <br /> xoo <br /> - <br />~ L ~ lengtn pf longest wcterr0ur5e <br />xcoo o, „ ,n miles <br /> soo M = elevCt,on difference ~n teet <br /> .oo <br />~.o:a~ <br />tl 0: --~ 600 <br />1 <br />• be] J <br />Exam pie L <br />Booo <br /> L ~ ",250 +eet <br /> H ° lb0 feet <br /> then TC ~ 0 57 Hours <br />Loq, 1. ,(SCS Gu'roe) may be es+,moted directly for o Dds,n <br />by SuDtliv,tlinq iNp triDulOry tlrO~noge suDOreds and usrnq <br />the relOt~iOn snip. <br />L ~~t Tv wncre L ~ idq to Hours <br />r, <br />0:° the e~tn Increment of area ,n s.7. m~. <br />T, =troves t,me .n Hours from center of or, <br />to main Des:n outlet <br />4 = tOidl CreO Of bo S,n,54 mi <br />~~pon ]0. Tiny of <ontrmro,~on n,~intnet. Is r.e~, 7 0l ) x88-0-0107. <br /> <br />