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<br />qydrolo~v
<br />rCiblltari,.s to th,. CObClrl" I(lv,.c if: [Ik dcld,-v <If n,,~,.~,,~ to
<br />Gl~r.wood Sprt.~g.<, Cabrlld" :In str~.:lm. th"C fL",d fc"", ~nn'"",,,.lt ',q w~ll ,"
<br />
<br />lJvrlraulic"
<br />
<br />Tlw li.S. '\rfllv ,:n~L~""r~ lJf:C-2 computer l>ro~ram w~g u,,,d to p~rform
<br />
<br />w,~t~r qurfa.c~ profi lc comp<H:ati<>n..
<br />
<br />~"vcr"l brido;e. "nd culve rt, ~~ist
<br />
<br />from su",""r n.b,.
<br />
<br />Th, int""l <>f thl' '''L~lysi" ",as to S<'p.H"t,. till' ann.,\.11
<br />
<br />aloc.~ eh" chann~h thcouo;h ehe study Hach.
<br />
<br />!)l"'e"dans far t~~se road
<br />
<br />peak dischar.~~. [!Lto rainfaU ~v""v. and ~"'~'"",,elt event".
<br />
<br />Separate
<br />
<br />crosqi,,~s wet<' dHd1nLned from field inv~~ti~ations <~nd the data ...as
<br />int~~rat"d into appcop~iace crOSq s"ction ~ata.
<br />Crou ."ction data, and reach ien~th information "",re olxained f~om
<br />photoj(rMI"'~tric mapa. 'laps ,"",u prepared especially for thls study,
<br />
<br />freqLJencvcurvesshnllldb""o'llbinedst,'t!stioallvtooroduceaflnal
<br />
<br />diachar~~ freq ~,'ncy curve.
<br />
<br />Theu waq insuffid"nr gneamflo... data of
<br />
<br />rddall flood ev~nts to accomplish thls, thcr"far" th" SCS TR-2fl rO'llPllt;>r
<br />
<br />prOi\ram ....')~ t1$ed to si"'ulate r3.inf3.11 flood P<',1~~.
<br />
<br />The model W~5 IIs~d on
<br />
<br />e"cept fot th"upper reach of RaanCre"lt.
<br />
<br />Availablc,"apspravidedby
<br />
<br />t6 watersheds of v"rvL"~ .,;.es.
<br />
<br />A re~ional curv" of draln"o;~ area vs.
<br />
<br />Getty Oil Company """re IIsed for this upper reach.
<br />
<br />Th" Getty Oil ~ps have
<br />
<br />p~alt dLscharo;e and fr<'qu"pcy was d"vdoped for .ainfaLl floodinl(.
<br />
<br />Th.,
<br />
<br />5.0 ft. oontour intervals whereas the ather ma~' have 2.0 ft. intervala.
<br />ijydrauiic rou~hnes. co"ffieients (n-vatu~s) ~er" determined from
<br />fteid inv;>sti~atians and documented ...ith photo~raph. (in technical
<br />
<br />TR-2fl ",ulvsis inclu""d the ~tand.1Cd SCS Tyoo' II (24 hour) rainfalL
<br />d1~tr,blltlor. .,n,j ntrV~ ""mb<>rs for an average ant"ce.Mnt ~oll 'IlOiHur<'
<br />
<br />,"oI,dlti"n (NiC-rn.
<br />
<br />rh~ di3charlle V3. drain"~', dr~a data. from this
<br />
<br />~ddend"m).
<br />
<br />A t.~blJl~tion of ro"!o;h,,,,~q eoeffici""ts to; lnclurl~d l" th~
<br />
<br />analysLs .....Ce plott"d, and a re>:r""sion lin~ computed for s~ver,,1
<br />fre_qu~"cil,~.
<br />A c"~lonal ,urv,' ''''~ ~evelop~d for "nmn\elt Hoorl events \\..i"-~
<br />
<br />terhnic,~l arldencium for variou.' locations "lo~ the study re.ch.
<br />W,~rer ~urhce pr"file~, typicai cro.~ .ectioll' ",,-rl "laDS gho",ino; the
<br />
<br />stt~Am~a~~ dAta fro~ ~ qtr~a~~n~~~ in th~ area.
<br />
<br />TI\~ Lo~ P~_ar"Qn III
<br />
<br />lOO-y~ac ,~nd SOO-vear flood linl's ar" shown on inclnd"d c"hibLt~ M'l{\ flood
<br />plain ",-"ps. Tahl~ 1 she.... computed flood ~l~vatlona ~t ~pecUk "rM~
<br />,,'crlon..
<br />n"od l1nl'~ wer~ ioca~l'd (In the "lilpS by tra"af~rrtnlol flood d~vM1onq
<br />(at ",ar co"toLlr inrpr~~l~) fro", plOHNI pr"fil~~ (from 'lE(;-2) to thl' m""q,
<br />
<br />fr~qn~ncy dls[rlb"tion (a~ detin~.d b 'olRC f1dl~t.i" 17-R) w~" lls"d wit!' "
<br />C~lol,oo"J ~ke... '4eiv.htl'.1 wit.h ",,,11 c"mp"ted station ~k~w. Th.- dat" -"'.1~
<br />plott<,d and fre~\lenc~ line~ dra...n.
<br />Tlw two n~iQn~l rl1.ch"c~e fn'~"l'n"..-"r,"n"~<, ac,'1l c"rV~" (rllinfall
<br />and snowmdc) w,'re "o'flbtned LJsin~ a ~t~nrlard pr"b"bi1i~v eqWltton:
<br />p( co"b)~P( 'nGw)+p( c~ln)-(P(s"a-..) ~r( rain)).
<br />
<br />".in>: st_~t lor.lr\!; "lon~ ~he matn cha.nnl'i a~ the Ineat ion r"fer"ne,'.
<br />ool"ts ...~re co"""ct~d and s""o~h"d to crl'~tc thc J:lap flood U""s.
<br />Sl~ni fical'lt divlrl"d f1o'.. occur. at th" railro,ld ,ros.inj( ~ou[h"'e" af
<br />
<br />Th.,."
<br />
<br />r,[. cO'Tl~ir..'d regio:>,,! cur'/~ 1s ~roDo~"d for .tudi~s al.ong th~
<br />C"londo Ri"~r Tdbllt,H["~ In the viclnlrv ,." n~h~,,~ '" r:!~n"",nrl Sp"in~~.
<br />
<br />':ic.~c!111r_e n:\ P.1r.1chLlte Cre<-'<. This divid~.d tIo'" ~CCllrg when r.acricted
<br />f1o~ fCQn: th" ~allro::d ~rtd~e Q"~nops th~ tracks foc t~" IOO-year and
<br />
<br />Colorado.
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<br />1'.
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