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<br />Ik"wtdjtolft ENGlNEE/f/NO HYDIIOLOOY
<br />1yryoI1_ I""""," ., iJt. Hy4,..II<1 Dlt4lumlAScr
<br />iii" Job 21.]0. I99J. $/III FnM/.... C.1i/.
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<br />Jalftll. R. D.. 19113. Flood ...,alkln Uml\Iln .,. RocIc)' Mouman,
<br />In Kuo. C.Y., ell.. Eng~_~lQ I'Iydtology-P,oceed1ngl oil!-.
<br />Iymposlurn '.....1IDI'8CI by !he HydraUlics Division 01 the
<br />American Socllly 01 Clvll EngInlerS, San ~1IcO.
<br />Call1omil. July 2.5-30, 1993: New 'ttlk, A/'Il8IICan Socllly
<br />ClI Civil eng~, p. 1110-185.
<br />
<br />Flood El,v'llon LIIIIllIln lhe Rocky Mountain.
<br />Rob'I'll!. J.rrtIt', Member, ASeE
<br />
<br />Ab_traet
<br />
<br />All onaty.11 of n.f1ti7 'laUOlI"felll 01 slre.mftow-g.glng s1aIlon do" IIllIIl
<br />3,148 lloUonl In \118 Roct<y Mountains Indlcaltllllal \Il.rell.ladlude-dagendl/ll
<br />aIlN'lIon IImlllO IUbSlI/llIIII IIInlan-produced hooding. TIle eItv.lIon Urn, .."ges
<br />from .bOUt 1,650 III In Montlna to .bOul2.350 III In New MIllICO. AboYe 11111
<br />,Ievallon ImiL large ralnlaJl-pIIlduCed floods occurveIY 1nfIequenlly II/Id m8ldmum
<br />unn d1schlltge is f.1 m....".,.. or lea. ~ow this e1evallon IIlTlII. 1.rgt:rnIlIn1lUde
<br />Iloodinv is fIlORl common I/ld rnlIlIimuIII unII clschalQlllIIIQII ,rom \lI30 m>lW\Cml1n
<br />IdahO llfId Monl.n. IOSG mJ/.".,..1n New MexIcO. These....... ,mphulz' Ill,
<br />ClIl1c11 nMd lor _Ill reaearclllO lnCtlIue our Icn0101wd\J1 oIl1ocd1, and have
<br />Impol1lnllmlllica\lOllS In wll.,..-.,.... JnvesligatiOlllln the Roc:ky MounlllnL
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<br />Wtrodue:IIDn
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<br />Knowledge oIlhe occurrence, IIIl1llnnudt. and lreaUency 01 extrem.1\oodI1n I
<br />region " ol glial JmporIanC8 In mony wller-resou....ln...\lg.uon.. EIlIcIenI and
<br />econornlc dislgn olllood.p1aln llructulll Iud> u splDways lor damS IIIld sound
<br />IIoocl-plIin lIlMogemen1 requ/re In!oIIIlaUOlI rvganlIng lIIlIftm' floccls. In \Ile Rock1
<br />Mountains, !he tiydrorneleorology 0I1loodS Is poorly undetIlood becauw.
<br />(1) noodftows can resuIlIIlllllIIIOWmt!I- or ralnlal.rUnolI; (2) meteorOlogIc condl~ons
<br />In moun";'1<lUS lieU Ire ~lncI (3) rainllIll/ld lllfIamftow reooidS gan."",
<br />ani 1I10111/ld 8IlIIllIe IJiIlftll, 19"". The GIDsOIl Dam, Mon\lftl, 11164 lIoOd' \Ile
<br />Rapid CIly, South DaI<olo, la12 Rood: and 1111 BIg ~ AI"". CoI01l~t_1876
<br />IIood. alllcamed In mountaInouS .... and lid mill)' in8lIoroIogIIlI, hYdlOl_'"
<br />and anC1S1O DeileYe that exInImI tIoolll oouId occur II lIlY i/8VlI1Ion In till
<br />Roct<y 1OInI; this .... . nllIIO/\IIlIt wumpllan.
<br />Inllrdlscipllntry ~MWch ol!he hood hyllroJogy 11\ ColOrado indIcaled !hili In
<br />H:on:.r11 aIlova 2,300 m. pe...llows 1ft caUsed Ilr snowmaI\. BIlow 2 SOl) m,
<br />pdm~ lie caused ~ reinlo. (J1ll8II1n<l CoS1l. Il183. 11188; Jarrell, 1t9Oa,
<br />11l9Cll) and..ry ra.. from ialn-o",,_ (JlrrelI. 11l81). To dI\Im1Int and dIlIne
<br />on "lI1Ion linit lor CoiorIdO, pak-flow dill lor II ColOrado S\IlIamflow.gaglng
<br />IlI1iOn1 weill onaJy~Jarrel\, lQ81). unll clscIllrg. (peak cltch.rae dMded' ~
<br />dralnlge atel) _ 10 quanDIy 1/11 reladve magnllUdl 01 ftoodlng and ....
<br />compallld 10 the elevallon oIl/le gagllO dIlIn. I/lli1ev1llon BmI1 01 Sulllllnllll
<br />IIoodng. IlaIow 2,3IlO m. I1lIIlllrrolm Unll cJldlarge In COIonIdo Is 38 mt/$IlcmI. which
<br />reIIecll"" cotUlrOpllic nolunl 01 cIouclllulSl-~ f1uh floods. For 'IlImp11, !he
<br />cio<JdllulSl ClYerCheny C.....ln 1838 In IUlem Colorado llfllduced 810 rnrn OIlIln
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<br />'~ydrologllt U.S. GeoioglCll SUNty.llaI25046. liAS 418, Denver, CO 10225
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