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<br />WEST~RN BOUND,o,Il,. W."TEIl BUlLETIr~ 19";; _ INTERNATIONAL BOUNDARY AND WATER C.OMMISSIQN
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<br />GENERAL HYDROLOGIC CONDITIONS FOR 1977
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<br />Colorado River
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<br />1l0IlllLllJ, 1.heI1' i~ no lIlellSUl'bble IIDlo:IUh1. of T\J!loff frolll 1.l1e pon1':>11 of t.he CQlo,,,do R.1v..r bR~ln in the
<br />UnHed St.II1."S and ~xico be10\1 Ifo-:over [e.tll, not lncludir..-; H111 liJlllams Ilnd Glla F<ivers Th..r.. '.Il.~ no dgnl_
<br />[tcent AlIlOU1\t 1n 1077. The IIV":ro.,. ,.<:asar...l (October l-:H;_Sept~"'ber 1'177) n\lnfall over the upp"r bas1n, 115
<br /><JIged t<t 1:1 tncl"-~ stll.t1on>', "'II~ IIbout 5,15 111ches cOIllIt'red to II S""50"a1 avemgll of IIbout. 1~ 20 Inch..~ for
<br />the 26 s..lIeooS Or;;5f-1977), In the 10\1er t.a~1n of th.. C010mJ.o River ~n loIe~l~o, frolll MordOB Div..rslon DIl.lII to
<br />th.. Gulf of ClI1HonulI, the Ilve]1l.g11 prec1pitation (1077 J "",lIeur..d 03.1. tJ Ir..:!". ~te.tJons "115 3,<)4 Inche~ cOlllpLred
<br />to ...., IIveno,6" of 2,6'3 lnch"s during the last 1'1 :iellrs (1~5O-l?77),
<br />The nOlI of the COlorROO IUver r"lIch1ng Impe'-1al Lam .....F 5.704,:',00 IIcre-feet, ab'JUt 7l't 01 the 43-yee.r
<br />IIvel'llg" (1'135-1<001) of 5,006,977 IILre_fe"t. At the ,.ortl"...rl:; 1nte:rl'llltloM.l bOund.!..ry, netotlll flow of the
<br />river during 1<)7; ""', 1,409,CJt,2 ..ere_feet. abOUt. 4Z;t o{ the 11135_1<177 IIVe]lIg11 of ).51<,,~1l aCre_feet At the
<br />5outh..dy 1<lt...mlltiOf...l bOUI1.,]....,>" n.e flow du:r1n,<; 1'177 "'II, 12,),-:;8 1I~...._feet. Or "bout 4.6,!!,of t.... 1'J35-1'F"
<br />IIvel'6ge of 2.044.273 ncre_f~et. n,e totlll no. of the C01011l.dc. F'lve,- r..e~h1~g the M C. Ibdf"1gue~ j;;llg!.ng etll_
<br />tiOIl, 2~.5 milell d,,,mc,trell.lll frorll th~ Fo"thel'ly 1nterl1lltio]'<B1 bounJ1ll'Y, IInd ~.5 1l<11es Up"tl'''lIIIl 11"01lI lhe Sono1'8-
<br />BIIJI< C~11ror,,11l '1I1lrcad b:r1<!oe. \IIl~ ~5,13? "cn,_{eet i" 1'177, IIbout /j.l%of thp. lc'51_1~'7 IIve""j;;e "f <;;41,317
<br />acre_feet.
<br />
<br />The total 011111 fl()\/5 of th.. Co10]1IOO Piver ..ntel1.11J!; Me.lco 111 10,77 nlll:,ul1t.ed u> l.77B.~.1)'} IlLre_f..et, 4j'X,
<br />of the 1'J:.5_1Cl77 tlveJ'&ge of 4.103,252 ac~~I'~et, e~ "lee~ured 1) In the Co10mdc. H"e,' lit \.t'.e "o,therly 1ntemll-
<br />t1olllo1 boundafj' , 2) In th.. l.Ielltan_M::l,...",k 1o'I3.1n OUtl.,t L'mill E:xt",,~1')n ne"f" M::lrelos Db"', )) 1 n the .....et~~e.)'f
<br />tl-vlt .u1l~l13.rge 1"to the UwJ.tl"O~e c..<:t10<1 of tr... f"i"e,.. frolll the l!nite.j 5tnte~ ~lInk,~) 1<1 th.. caMl "r.1eh
<br />difcl...rlleo ~1I~t'" "".:I. drll.1]'<B.g~ ""tel"!: f)-Olll the ~\.ll!ll. Pro.l~et ecro~~ 1.~~ southerly lll,.1 brnm!ilI.-)' 1nto Me,--1co nell.-
<br />SILIl Lu1", ArilOIlfl, ~J e"lefl>~n"j' d..l1velj' of C~lo",do 81ver 1lIl.tef" for ue.. In TIJullllfl. E'lIj~ CaUl'"mlll, end. 6) in
<br />th~ \.I~ll1.'-'r._M::lbawk BJ'pLsS D'1Iln ll.t southe:rl:, 1!Uld bour.&..r:' "e"r San Lu1~. "--"i:",.&,
<br />
<br />No HooJ V'1l~'" of lmj:ortan<-e oCCllI't'ed in ftr"""'" of the 10ller C.:>1':>l1l<10 R1ver ['1I~ln during 1}77 A IllIUl_
<br />IIlUJl] 1nf'tllnt.aneou~ no" of 11,'.60 '~cond_fe..t occurr..d In t.he C:010l1ldo Hl~er at the IIOrtherly bOluOrj eUltJ0I1
<br />0" August HI, 1"71.
<br />
<br />""tored "lIte,-.,-. lit 1.1',.. end of the vellr 1n the tl1re~ ""'Jor .-e5ervol,'~ On th~ COIOl"d<;; River L~lO" l~e'",
<br />r..r:r:' a.c.JuJlteJ to 22,437 ,iGQ eCI-e-{e",1., 7EfX, of th~ 'Jfllbl" ca].ll.c1t.:' of 2'3,55.'],400 nc...._f~"t. '!11~ gr_te,' l"rt
<br />(20,<'50,l)Ju a~r.._feet) of tt,~ 5t-:omge 118.S contained 1n Le.~ 1oI!!w:l (H~ove,. [Jael) Ther" ~..re no r..p:lrt..<i eh"r1._
<br />IIges of C01"l'lId.o Flverll8.ter 1'0l' l",1.E;I<t1ondur1.nc; 1077 due todrouE;h tOl'lIcci<i"nttotbelrJ'iga.t1",.e;.'ste[]l
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<br />The tato.l cep"ct...\ ,,,,'ea.e" lcrlo>tN f,""m ""t~,~ .of th.. Color1l<lG ~lv..r b~l". l.rn1""1.al !'AuIl in 1Cl7i ""c.
<br />1,1134,;1) e.cr~~; (j63,~~5 ll.c'e~ 111 the l"uted Sta1.es Il.l1d :.01.21a IIC1'e~ lf, 1oI!!,.1co. An "'~tl[ll),1."d 3)'t')f "crellB"
<br />in IoI!!xico 15 ~e:rved by p.I.lIlp1f.g r~llI "ro\l!'.d \Jll.t~,..,
<br />
<br />The ~uel"'"d",J ~edJ.~nt. 10000d j:"~lIinE; th.. nonherly ~aund.llrJ 5tlltlon 1~ 19iJ w,,", 70.0 ec~_f"'~t. Ilbout )j'X,
<br />of the 10,;.':_1-",77 ave"Oe of 22~J IIcre_fe..t,
<br />
<br />Tijuana River BRain
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<br />Dor;nE; 1<>;, t~e temlertltule~ 111. Banett Utili, CldlJOnUII (eh"".tloll 1 ?~,O I'e..t) in the Ui-']...r ].OJ'tion or
<br />the UII~1r. in the Ur,it..a ~tRte~ IIvel1lcd 61.':> deE;ree~, 0.4 ue,,;re'" aLo"" ~he 47_:'eRr n.eB.!l. In th" ~_,tJ"ewe uppe'
<br />).lJrtio<1of the bneJn in M!!>1co t<t SWl Juan de Dlo'.. ~Je Ccdlhnlia (d..Vl<t.lon ),<',50 f~"t) the ,'eec.rded tern-
<br />j:"r1l.tu:r~e du:r1nc; tt,e yellr eVerbE;"',j 5~ degr..~~, <' <1~gree5 bel[)\.' the lor,g_term "Vel'llge; enJ lit Ibdrlgue: [Jam,
<br />5aJ1I CalUunuo. (el..v,,:tion 4~1 f..et), 1.he l'eLordlld ""..>"'....:ul.e~ a\'''1'8ged t~ d~gree~. 2 degree3 Il.b-:OV" the n01'lfBl
<br />of ""'ni ;'~Ilro
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<br />At &snett Lam 1" the up>"r ,ol.t.lon -:of the ~1<~1" in the Ululed Stetee, 1.h.. ceeorc\eJ i-'red].itll'.1"n "115
<br />1~.;5 1neru.s. (yj');',of n~rI1ll1, ll.fId et Ch'~lB ':1~tB n"Hr th" l""~r end of the b1l51", 9.65 1I1cr,~5, Or lO~%of Mr_
<br />_1. The ,'"~o1'd,,,,- p,...,cipltatlon lit ~t<n Juall de l.'L-:o~ ln the up...,r portion of the bas1n In ~_uco. '.II~ 11.,?"
<br />1nches. l<,pnJ>_1.I!Ittel:; 123'X.of tl,e "ornnl jur111"; the <'~-J'ell:r peno:>.:l, "<1d at F.od.r1gu~o l.Rm Ln the l"""r p::>rt.lon
<br />"f the ba,111 1<1 Medco, 10.';14 ln~he~, 13~ "f n.e ~O.;.'ear 1I',e"""ge.
<br />
<br />F:unoff ln tl e ba6111 durlng 1'117 IIv"l1Il!e.1 1,,~~ tl..n 5% of norrm.l Above 1'0,...,"" fe"p',",,01r tr_e J'1lI.0[f ""e
<br />212 1I~,e_leet. Or Ilt.~ut 5~,of th~ 41_:,..,lIr lCl)7_1Cl77 11l"anof ~,l~'J ..ere_f.,et At Podl-lg<Je::; P...ef"Volr, the
<br />ru,,,,ft 118." 670 IIC1'e_fe.,t. 01' 1I~O\Jt 1,% of tr.e 4[1-:leal' melln of'12,256 IIcr.._re..t
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<br />The flO" 01' th.. T1JUII~ F<iverllt th.. Intenltltlonlll bour.J.a:ry "'11.'1 l.~:lOlIc:re-feet aur1n" 19n, end the rl""
<br />1n tl1e TI~lJll.nll. F.1ver l1ellr ~le~t.'l,- ~'a5 6; t. IlCle_f~~t.
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<br />Whitewlller Draw
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<br />Dunn~ l">n, th.. IIv"",,,e WlflUlIl tem]"l1Itu"~ o"e]- U,,, .....t",~I'ed "..~ sl1"I.tly IIbove no=---I. ~'hll~ the
<br />annUhl >r~clpitRt1o" ""5 ROOV", nonml. hJnulf fQr tl,c )'<lIr at the .:agl1l6 n...tion net<r CvlJtjlaF, Ar1oot1ll of
<br />10,678 ...,"~_Je..t ""~ II~O'Jt l~G'\", of IIver"'e~ -
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