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<br />6
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<br />WE~HRN BOUNDARY WATER BULLETIN 1<;110 INT~~NATION^L BOUNDARY AND WATER COMMISSIQN
<br />
<br />GENERAL HYDROLOGIC CONDITIONS FOR 1978
<br />
<br />Colorado River
<br />
<br />Ilor",ally, tnere l~ no "'eJ.~ur~~l'l allIount of runoff frolll the porUon or lh.. Gol'Jrad" Hlver ba~ln in the
<br />UnIted St.a~,,~ and Mexico t.elo", H'>o.er Dall, not Including Bll\ Wlllialll' and GUa Rive,',. There ,dS nO
<br />,Ie;n'f,cant ""'''un~ In 1978. The averap;e ,ea9on,,1 (October l~71-:;epte[]lber 'nBl rainfall Over the upper ba,tn,
<br />as glIg,:,d a~ 13 index ,tatIon" ....." aboul 1~.35 lnche", co'"pared ~o a "..."on"; dV~r.l.l!;e "r ab"lit Ill..:!:) lnc.~e" for
<br />1M n gea90n" (1952-1'178). In u,,, 10,",,,r basin of lh" C"lorado River In HeX1CQ, fro", 1010""109 Diversion Dallllo
<br />th.. Gulf "r C"llr<:un13, w.. a"erage p.....clpit.atlon (1918) <ll"/I"W'ed at ~ ind". stalion~ "a~ ~.~9 inche~, compared
<br />to an av"'r8ge or 2. 7b lnch"~ durlng th~ la~t 20 I'ear:! (1959 to 1978).
<br />
<br />Tr,e [10" 'Or the ColorJdo Rl"~r rMchLng ;-",p"rLal CI~ilI ..&~ 5,t99,7CC ..ere-relit, ~"<>Ul 72'). I:'f Ihe ~~-Jlear
<br />av"rall.e (I'1J5-1"'18) or 7 ,~5~,53~ ~cre-ree'.. At the northerly lntern,tlonal boundary th~ total [10,", or th~
<br />rl'ler durLng 1178 ,",a~ l,~57.~0~ acr.._feet, abo'Jt ~2J.,f lhe 1935-1978 averag,:, ,,! 3.~bS,708 acre-re':'t. At the
<br />~outh"rIJ Internatlon"l l:;ound~y, the now during 1978 ..a~ only 61,569 "cre-reet, or Iltl<>ut 2.~1 or the
<br />1'!3'>-1"78 overa~e of 2,585,~75 acr~_:'"et. Tn.. toU,l rlo,", of tn" Cc.loradl:' ~h~r reaching the M. C. ~Odrlgue.
<br />i':"8in!l ,taUen, ,,4.5 "lll.." ':!"_11.i/tro!&'" r,-oc tr.e 3.,"t.~er!y l'>toi'rI"JlJl:'r:31 houndal'"." and 11.5 IOll~~ uP"lr'eaIII frOlll the
<br />5:<Jnor~-BaJa Callrornl,' railroad bl'ld~... ,",a~ 26,191 acre-feet in 1~78, a~oul 2.91 of the 1~51-In8 average of
<br />913, 202 ~cre-r.."t.
<br />
<br />TM total 01' all rial." or tn.. Colorado ~lv~r "ntering Me,leo In 1978 allloun'.ed to 1,727,10~ acre-feet, ~31
<br /><Jr t~e 193J-19~.'1 ~~~,~,]g'" oj' ~,(l~',,2~8 acre_fe..t, ~, ,"ea~ured Il In the Colora<lo ~lver at th~ northerly
<br />inter~ational boundary, 2) In thf> Welll.,n-l'1ona"~ """In Outlet Drain Exten,l"n near Morelo~ Oil", 3) 1n tM
<br />"a"te"ays LMt. di"r.hare;e into the l1!llltroDh~ 'e~tlan of th.. river rro= the Unll'l<l State, bank, "l In the canal
<br />which di~charg", "Il~te and ~ralnage ,",Jt'lr~ fro," ~he Yutlla Project acro"" the .southel"ly land boundary Into Mexico
<br />near :Oan LUl:!, A,.lzon.l, 51 ","erll.en~y ~el1"..ry or Colol'"a,j" ~l"er ..~ler r<Jr u"e lh T1juana. B~Ja CalHornla, and
<br />0,' 1,0 l,~" WelJ l",,-Mona.... Bypa~" Dr~ In lit sout~erly 1 ~n~ t>ound3r, near San Lul", Arizona.
<br />
<br />~lo rlOO,j D"~k" .,r '''peon"nce occurre~ in ~~r""-"'~ or th~ l~,",er C"lora~o ~lve~ t>llsln during lnJL A tIlaxlmUlll
<br />lnst3"t~neou" no,", of 5,190 ""eond_r"~t occulTed ln the Colorado ~1ver 3t th.. nortnerl~ boundary "tatton on
<br />Haren 3, \~7fi.
<br />
<br />;Jl"rp<l ~1tf!~.s at tile enct "r ene l'eol'" :.~ :,~e tr.rl'~ IBJO" re3~rvoi~>< em ~n", C.,lorado ~l"~r bl'lo,", Lee'~ Ferry
<br />allount".;1 to 2~,191,~00 acre_feet, B'j1 or the unt>l", r.ap~clly of ~8,588,~00 acre-feet. the great~r part
<br />(21.~~O,OOO aere-fe-et) 01' 1M stor&jlle ..a" contained in La~e Mead (Ho.",..~ Dalll. There were no reD,;,rted
<br />"hort"ge.s of COlorado RlV~r f..r l~rig3tlon <luring \~78 ~ue to droughl or a~c.dent tu U,e trrlgatllln ~Y9tem.
<br />
<br />1,~ t.ct.Jl rel'orled a.'reas.. l~,'i.llate~ rro", lJater~ 01 tne Col()radO ~lv~r D~lo.w l"'~~rl"l [lam in 1978 w.s
<br />1,180.9IQ acre5, ~7~,~90 acres In lh'l Unlt~d SlatP~ aM 50':',nO acrE~ In Hedc'J. An ",~tu.atcd 3)1 of acreage
<br />ln Meuc'l ,~ ~er"~<I by pU",ylng rrom groun.j ~ater.
<br />
<br />the ~u'p""1ed 5edlm~nt lQ;l1 pa"~ing thP. n'lrtherly boun<lary stall on In 1975 wa~ ~1'l.O Icr~-reoi'l. about 311
<br />"f th~ 1~~6-I'n,3 average or 222 Ilcre-I'eel.
<br />
<br />Tijuena River Basin
<br />
<br />DUrin!,: 19.'3, lne teIOD~r.).tur~~ at B~rr~u Oa,", Callr.,rnt& (elevati~n \,750 feet) in the upper porUon or
<br />the bJsin In lne U~lte~ St,'1t~~ av~rag"<I ~2.5 ,jegree~, 1.3 d~i':r..~" abov~ the ~B-y"ar lIlean. In the extrellle uprer
<br />portl"'" eof th" ~~,In In Me^l~o at San I"an .j~ Dl.o~, Baja Callr"rnla (ele"aU,")n 3,280 feetl. the r"corded
<br />te,"pe~at'''e5 dUr!.ng the- year a'erJ~ed 5'j degr~t~, "<Iu~j to the I,'ni':-t~"'" """""6"; .J.~t .1t ,~'JdrJ6~N D""" J.laJa
<br />Calif~rnl,' ("levallon US9 r....tl. the r~C'Jrdect ~~,"peratur~~ a"erage-~ 6~ degree~, 2 d~gree~ above the nor,"&l ror
<br />lOanyy..ar,.
<br />
<br />H Bar,ett UJIO 1n th" 'Jpr"r ,.orUon 'lr tr,e b:3~in ln th~ Dnlled Slate", th~ 1')78 recorded p~eclpllatlon ..."
<br />35.., lncne,. ,,(lit ~f n"rnai; ~M at Chela Vi"t.. r.~~..' c~ lowe,' ".~d ~f the ha><ln, 17.26 Inche". ~r 1811 or
<br />normaL The r~~or<l~<I preClplt&tlon at San .'u"n <Ie D103 In the u..p..r partl.,n or the bll~ln In Hexico, ,",3~ 33.'j8
<br />lnet,e". approxl.a1"t~ly 21~1 of the n"rm31 1urln~ the 23-ye5r perIod; and at Rod~18ue~ Datil In the low"r portIon
<br />"r th~ b~~in ,n Hell~u, 17.~9 lnch"", 21~' of the ~l-Jear av~~ai':~'
<br />
<br />Runor.- in th" !>a:!ln o'Jrlng \978 oo"r3i':"d ~or" than ~S01 or n,;,rcoill. At>ove l'1orena ~e~ervolr lhe ~unorr ,",aJ
<br />15,5~1, a"re-f~el, 01' about 2681 or th'l ~2-year 1~37-1nd CO'lan of ~,3~1 a~re-fe~t. H /iodr'lgu..z /leser"vlr, tne
<br />runJrr "'a~ BB,881 acre.re"t. ~r about 6291 of lhe ~1_,ear ,"~an er 1~, 127 acre-re"t.
<br />
<br />Th.. 110'"' or tile TljU1\",,, River ill th~ tnt~rnatjonal bOlJndary ,",J~ &~,6e8 acre-feet dUring 1~78, and the rlow
<br />I n th~ TIJull,a ~l "..r near Ne,lur ":3~ '/2. 35~ acre-feet.
<br />
<br />Whitcwlller Draw
<br />
<br />DurIng I'J7~, tne av"rdi':~ annu31 t_~,"p",'at'Jre OHr the "3ter~hed "'a" 5lightly abov"! norlll~l, "hll.. the ""nual
<br />pre~lpllhtlon "3" b~low n"r..al, ~unoi'f fer tne y~ar at th.. g<lglng "latlOr1 near Dougb~, ArIzona or 1,832
<br />acre-reet '"'~~ about 21' or av"rag~.
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