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1 <br />• <br />i <br />7 <br />t <br />+{i <br />.1 <br />. j <br />,' <br />,j <br />' i <br />t <br />:, I <br />-~ <br />• <br />`, <br />.~ <br />. 1 <br />i <br />' • <br />It <br />(c) Coanplrfctiolt of lnllna• Design Fioods- <br />Ens: nJ 105' ,1lcridiau.-This subsection illus- <br />trates the prorcdure for computing the three <br />floods for drairla~c areas cast of the 105= me- <br />D[SIGn OF S~~.ut n.t. <br />ridian (c>:amplcs 1, _.::nd 3), ant! ••ub.rrG <br />(d) di;cusscs the pro,cdurc fa' drainal:c arc <br />«'est ui the 105= meridian. <br />E'zarrlp7c 1.-7lczin,un+ Probable Food Easf o/ the ]OS• .1leri dio r~ <br />General nrocNuu <br />SPrtl6a •PP:~r~ln~n <br />1. Prtr nu'nr concrnphical loratlor. and size c( drainage <br />a rra. <br />n_. Drtrnninr lone numbrr and 6-haur 1G->qua re-mile <br />proba b'c ma~mlum prerrfl: anon from fi;,. l.i. <br />.. Determine the probable maximum precipitation <br />! P?I P i in.-mmcnts as follows: <br />!aI Ad)ust thr f.hour 10-square-nulc PVP to values <br />for tar C:s'cn dreira~e area sue and to lonerr <br />rluratior.s by' use of fl g. lu. <br />(b) Dc:erminr hourly amounts o: P?iP u'i:hln maxi• <br />mum IErs:l E-hour period by percents se values <br />of run'c for zone C, fib. 1&. <br />1. }'nr th,s r~.unp:e u<r a site ir, P~'~~n,, r'ncnty'. <br />Grs inagr an•a r5 61 squaw nubs. <br />:. Zor.r ~ . <br />G-hour 1J-+quarr-mile probable r.ra:imam. pl rr,pi' <br />Lion is _JS mchcs. <br />J. fnl C~s:n~ 5c. 7~~. obL~m p:oba iLr n:aair::um pn•c <br />iwuon IP\1P) Cor area n; 51 s~l•iarc milrs I <br />rariotu durations: <br />r~.. .n <br />n-1: .. <br />a-.~ ... <br />0-16... i:: ... <br />_ (b) Hourly P>iP G-h••`:r perlnd -- - - _ . <br />i'.. .Lev .,.. L, <br />1.. ....... ..... r~, 1,. i :~: <br />...... .. ... ,:1 1.1 .. '1 <br />3 ... ...... .... ..... r. it•~ <br />l ... .... ...... ... ~! Ir + 1 <br />L .. ....... .. ... rah JI.J 1 <br />(cl Tnl~u!a 1.• total ;5-hour P?iP srqucnce by incrc• <br />mrn:al t:mc periods sb.o~<'ing incremental tain'all <br />n mnu nt< and accu rs:!a: n~e amounts. :'he Inc:r- <br />man:al rs:ef n!: dur:a~ titr mazimun: t:-hoer pr• <br />r+•~~! ,h•,c Sl I„• n':~rra r.crd from tcc drrr~•a.!ing <br />rifer cl n:s l; nitudr n!•;amrd about to the fuiluw• I <br />ing ho•_rl;: m.aCmtude sequr rice, 1 lhr such G <br />h.a. ~c~ Q. ;. J. 1. _'. 5 .-6re a a judicial s~range- <br />mrn: :r.a: gn'rs a rcmpu:rd i:ood grra:cr t:.an <br />env bo<_rd on the a<y: ^:pUOn ;ka: :hr ~rra tcs; <br />h.~crl lac:^ment c` nro oc:urs c_r:c- ;~.r r.rst <br />hoer oC a ste^r, an"_ ., s^:.sllcr ~ Doti ~.-an t:-at <br />cor..p~t'.d by asscmi^~ the greatest hocr~q' :a- <br />crcmcnt c.f rain ecc::rs during the oth hcur ri a <br />s:om:. T'ne hor.r!g incr^.mrna o` a storm cannot ' <br />be prrdictcd. <br />Ic) P>IP design arrangement: <br />___.. I 1., .,i - .t, d., . <br />i ... ... .. ..... 1 : ~ <br />t', <br />. .. ... .. .. r . <br />~ ... ....... .. In i 1.. <br />t.: I <br />r. .. .. ..... ... i ' ~:~ <br />a6 ...... .. .~~' <br /> <br />