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<br />.jAIVU~ OF 1965 1::-, TIlE l'XITED .sTATLS
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<br />SOUTH PLATTE RIYER BASIX, COLOR..iDO, Jl..i'-lE 1965
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<br />position and slopC' of Clll'\.P ..1 from Hoyt :llld L;Ulgbein'~ curq'. Tl\1.~.
<br />Ltl'gpr 1I1l1ll111'r of ga;.:illg: ~tatiolJs~ 11H> ath1itiollaI 1;1 ypars. of n~('(lrd,
<br />and the more extensiye co\"t'rage of flood ('\"elH~~ particularly on ~m:lll
<br />t1rainage ba:--.ins since 1930. han' greatly increased the Iltunbpr of
<br />records of outstanding flooLl~. ~\lllin' of tIlt' ~Hlc1itional1"('cords art' for
<br />:-;trcam;..:; \yith clraillap:p arp:t:-: of ]('ss 111:11\ ~n :'-'f!u:trp milt:.". HI.'(,(,lit flood.;;::
<br />un t]w Ltrgel" ::itrealllS ll:l\"t., not t'.'\{'t'l't1l'd Ifoyi :lll{l L:Ulgbt'ill\; (,lll"\'~':
<br />('()llSt'qllP1Hly. ;11('. ('urn's ('nll\"('l'~\). :\lHl tIll' :..:loll\' of ,'Hn.(' .1 i:--: fl:u[(>l"
<br />tll:111 that of their..::.
<br />nab fo!' :'-'(,\-l'l":tlIH'ak di:-.:har!2T:-> during. tIll' ,11Il1C' }fIG,) Hoods and;l
<br />fc". .,l'll'l'[ed nnt,;[;ll1din,!.[ ilo()d~ ill other ,UT;lS arl' r:lLuhtt'<t in tahle 1.
<br />T1w talJtlb! ion iw.."lmlC':-; rht' ratios of these di~dmrges ~o the disch:ll'gr~
<br />from ellrn~ ,.1 for t he ~nmt. cll'ninn,g-e arp:l"
<br />~\c('ordlllg- to Hoyt and Li'..llgbcin, "fi.oocl-di.3charg-e potentialities"
<br />in the .So:lth Plat,~:: ~jn'l' basil: ar:, 1e5:-: than half .those sh?,,-n oy their
<br />Z~\:n.0 ::1 fig,.;:"c:l. .J. he; r Z-Onclll.3iOll 1.3 b<l:::pd Oil Jdnllttedly nsk-...' ~(-n(~I':l1.
<br />iza t ions, hut it caIt Ul' ll~ed as a b,lSis for ('olllp,lrisoll. l~he ra~ i,')8 of the
<br />,Tuno InG:) floods Oil ~en.-'-r:ll ::;tre:ulls. particularly those Oll. nijou~
<br />KimY;i, ;.n;d. PJnrE Cn'eK':3, to e,"i:r-,e _i ,.anp.:ed frmn nAC te. O.7"C. Cun.;:.-
<br />,1 i~ at. lea,:;t 11 percenT- hig-hl'l' bC'low l.OOG sqnitl'P miles than 110yr
<br />,~!ld Langb{'in's ('lUTe: tJw:" the .Julle !fHi;) Hoods, at ~eVCll m. mon: lo-
<br />cations, ~ubst:~ntially exceeded the ('stimated ';fiood-dis\:h~.t'gc paten.
<br />tiillities'~ of streams in the Hood area.
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<br />DRAiNAGE ARft,. iN SQUAR[ ;,jlLf:,
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<br />FIGUn;:!.--:,laximulll di:-;l"lJar;..:e:< iUl-platiUH to draina;..:!.' an',..
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<br />U)OIl :-;qll.:ll'(, miles.
<br />Thp ]mrer end of IIoyt and Lan.u1will..-- ('lin.p i~:l :--:ll'<light ]ill~ aud
<br />{.;tn bt' t'xpres:3(>d by
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<br />T.\BLE l.-Compan'son of recent outstanding floods with maximnm floods knou:n
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<br />Str...am
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<br />Drainage
<br />ar('a(sq mil
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<br />Dal('
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<br />Peak
<br />discharge
<br />(ds)
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<br />Ratio to
<br />ma:timum
<br />flood CUITC A
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<br />\\"here
<br />Q= peak discharg-e, m cubil' feet per ~el'oll(l,
<br />c=(,olbl:lnl,
<br />~'l:-;:,draillag(' at'e.l, in sqllare llIile:,. and
<br />n -=slope of the line.
<br />
<br />Kiowa. Creek at Elbert, Colan 2S.6 JUIH' 17, Hl6;j 41, 500 O. ,19
<br />Jimmy Camp Creek near
<br />Fountain, Colo_ _ _ _ _ __ ;)4. :1 _ __do_ _ _ ____ 124, 000 .0')
<br />West Bijou Creek near
<br />Kiowa, Colo________ s;). 7 _____do_______ 67, 200 .40
<br />East Plum Creek near
<br />Castle Rock. Colo_________ IDS June 16, 11)6;) 126, 000 .63
<br />~liddlc Bijon Creek near
<br />Deer Trail, Colo___u_ _ ___ 100 Jtlll(' 17, HJ6:' 14:>, 000 .60
<br />East Bijoll Creek at Deer
<br />Trail, Colon___ _ _ u _ _ _ _ _ __ 302 .....do.. ~74, 000 .7G
<br />Plum Creek near Louvi('r::;,
<br />Colo___________________ :302 June 16, 190;) 1.).1,000 .43
<br />Bijou Creek Jwar \ViO"'''in~
<br />Colo_____ ____ ___~~_ _"_'__ I, 314 June IS, lill);) 466, 000 67
<br />Eel River at Alder Point,
<br />Calif___. 2, 07n Dec. 22, 1!J64 061,000 .71
<br />Eel River at Scotia, CaliL__ :3, 11:\ Dec. "" 1!J64 752,000 .55
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<br />Marias Rh-cr near Shelby.
<br />Mcr:.L_ _ _ ___n_____ ____._ " <).1') J ::r:~~ " 19G1 ').fl oon 27
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<br />The l'lllpiri('aI equal ion for their ('lI1TC is (;= ,~I.~IOO _ t" ,:~. TIH' ('(Illal iOll
<br />for the' writer's \'lllTe A (fig-.~) is (J=l1,U()() _IO';l for the straig-ht-
<br />!illt' part ill'low ~oo ::-:qU:ll"(' III ill's. ('Olll'l'l'lIillg thl' ("hilllgt' JWIWl'{'ll
<br />tla' j,....!lO and 1!).~,O ("tlITl':-,.lIoyt and L<lll~llt'in :-:btl'<l. uThi;-; i:-, llO l,\.i-
<br />Il('lln' that flood eonditiolls an~ ('hang-illg. The IIp\\"anl :-;hift of rhe
<br />('urn':'> ~: i:-i due t'lItirely to an iHcrl';t~,'d 1l1l11l!WI" tlf gag-ill,!! ;-;ta-
<br />rillll~ :llld ill(Tt><l:-,pd lwri()(l of ,"p(,flrd:' They ;l!trillllt(ld till' ('llJ'\"atlln'
<br />(If rhe nppl'l' p:ln~ of botl1l"Ill"\"l'S to tlH' fal'[ lllar tIi(' BllIlIlJl'r of Hoods
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<br />lJU the lilrgt>r ~treallls. Similar l't':lS(Hliug ('an pxplain the difi'erellces in
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