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Ilo~d sl~.~;e, <br />• <br />79 <br />h.~~nmPlr ! -llcrimum /'ro La Llr Flood EaAt of thr 105' .1; rridlor,-ContrnuCd. <br />Grnrnl Drnr mlu re <br />,.„.~„ is u'dlnlf i"-.~ val:;rs dlscus.rd In srrlinn 51(u <br />I.rl ~~• w'llh Iunr a[ a (y C,r t, npplttnl lnn n! lhr[r <br />,I,. I" .L" Icl, II•...,I n•myula'u~us rrvlul rrs sums mndr <br />~.. :.l,n::.:.a (. AIL, n'S: <br />r: I I:rad appr •p n.l;r curve, i:;:u re .\~ ~ I;Ipprn- <br />dre A I. usln; nrfu muialyd rainfall amounts <br />I, ,r„t•rru;vr lIm^ :nrrrmrnts, and dctcr- <br />minr ac ru mu!-trJ ,!:rrr: runo!f for rrsprcuce <br />pn~[n~•sivc tlmr Incrcmra;s. <br />("_1 Tah e'a;r Ir.frrmcn:al r:u n.'a!! and respreuvc <br />incrcrnrntal ru no:'.; su Ltroct mcrcmrntal <br />runo.°, froal Inrrrmcnta! rain: al! to dcter- <br />minc ir.rrr:^rntal loss. (Loss tom pu:auons <br />brpor.d 1^_ hours are setdem nrcrssan'-sre <br />(311:!eµ'.1 <br />t31 Harr..`a l;~ru m'.^ ru roes. .`..tire A-7 (apprn- <br />du~ .41, rr:r Inu~rr loss ratr~ u'Ith incrrasr <br />In c:prm prCrl pllallOn, ll llCr~ Inge mCn;11 <br />lner ra•.rs deter rll old b;: s:rp (^_), above, <br />rrarh. 1~nr I:mrts s:atrd L^. erftioc 511c 1, the <br />n:r.c.^. fcnrc arc no lor,~rr card. Thc mcrr- <br />mrn:a! .•u ar~'r rs then cmn puled hp suhtraet- <br />ing the {I^"' _ 1055 rate amnu r.;s from the <br />i nrrr~;rn ta: ralnfnl'.. nfr,;mulauer run. <br />.:'; i-rrrmen:i rent.^.. and :nrrrmen:al lass <br />\.IIUCS are ^s',:ailp cemp~::?:; to hur.credths <br />u( an Inch. The cqua;icn Shown in figure <br />A-; ;aypend:z AI map be used [o compote <br />:Irr'u rlu:ative r;lno.^. t'a:ues. Q, to hundredths <br />of an Incl. <br /> SDr. iR[ .DDLUIiun <br /> DIRECT RUKOFr INi Cf:M E N TS 1'UU <br /> COM PU7ING ,L'ArI+fUM 1'R UUn^Lk: <br /> }'LOUD <br /> (\'dur. in lnrhnl <br />-- In. Ar ~ ~ . U,r^ n nl o.,R j <br />T:n el ~ ,. _ <br />- ._ _ <br />_ <br />- L:, <br />mein[ Lour ^• n ~ <br />^ I ~ 1~~ <br /> I ru <br />nhl: <br />,,II ~ A.. <br />run <br />' rr. <br />I, <br />Ir. <br /> <br />-__-_ <br />_-_-_ r <br />i <br />LI. <br />, <br />.. <br />. ' <br />m m.,l <br />.__-_ <br />.-_ <br />1 .... L:, I <br />1.1, ~ nrn Onl I I: <br /> <br />J ...~. l I.n :.n I r.'. I In n.'. <br />~ ... B n l l n n nt : 1[ I I '~: <br />b .... :.h Ic : II n: 2 ]•. n :: <br /> <br /> <br /> <br /> <br />'Com DUt.::on Dr CS es e'er. 0.09 meh rr. n••ur Av. nA,•n renr <br />' •nd u.r 4.:v mcA Drr nuur for rrmumne •wrm rr.<Irmmn. <br />r Paunti.l Wu, vrar th.n mnrmcnt.l runha <br />Dc;rrmine time of concentration for the watershed 6. Front map study: L-15.5 milrs. Elrvauor. d'. ficrenrc <br />• sec S';. fia. 30 and 31). i betweer. headwater and slte.:0v fecteN. S:nre these <br />I are the only data ar ail ahl n, T. Is esnmated hp so:uunn <br />of equation grvrn on figure 30. <br />_ 11.1 /.1 o.r[: <br />T ` 11 1 <br />(1L(I)(I~..i)}1o.els <br />-100 J <br />= i..i hour< <br />r~ <br />~J <br />