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<br />WESTERN IlOUNDARY WATER BULLETIN 1975 INTERNMIONAL OOUNDARY AND WMER COMMISSION
<br />
<br />GENERAL HYDROLOGIC CONDITIONS FOR 1978
<br />
<br />San Pedro River
<br />
<br />l'udng 1978, lhe average annual le"p~ra~ur~ "'a~ b~l"lI nor'''''t. The ""nual preClpttallon, a~ "'ea~ureQ at
<br />CoronadO rlatlonal Iionu"'ent HeaClQuarter,.. 1/:1,. 154S of the 1961.1978 lIean of 20.24 inche~. The atreJm floll at
<br />the lnt"rnatlonal boundary lias 39,836 acre_feet, 17 3~ of the 1951-1978 nOr"lllal.
<br />
<br />Santa Cruz River
<br />
<br />Durl~ 1~78, the averai!:e annual t".,peralw-e over lh~ IIlter~hed ",.sa sOllellhat belOI1 nor""l ami the annual
<br />prectpttatlon was about 1681 of the UO-year 193~.\n8 !llean. Auncff meJsured at the NogalM gaging stallc~,
<br />IIhere the slream re-enter, the United State" """ ~2, 310 acre-feet. The tOlal runoff for the year mea~ured a ~
<br />the g"8tng stallOll near Lochlel, Arl:tuna, where the ",tree.. en~era Mexico fro.. the Unit"'1 Slate", lIa, 2,571
<br />acre-feet. Therefore, neglecting ,trea.. floll depletions In Me'lco, tM r"cords tndlcate a contrlbu~ion of
<br />abo'lt '>9, 7,~ acre_feel fro," ~he loop of the rl ver 1 yl ng in Me. leo, or approx lmalely 96' or lhe floll reacnlng
<br />lhe N0S31~" atallon.
<br />
<br />Alamo and New Riverll
<br />
<br />Duri:>g 1978, th" "verage ann',a I l.e"'p..ra lure Over the dra Inage area of th~ Ala..o A I ver, as record..d a ~ El
<br />Cenlr"<l, Callfoml3, lias 72.,> ~egrees, O. 3 degr~~ above nCr'!ll31 , an~ o.e,' the drainage area of the New River, a"
<br />recordcd at Mexlcal1, B"Ja Cal1forn13, i~ "3S 73.0 deg"ees, 2 d~gree3 a~o_e ~he 53-~ear averagQ.
<br />
<br />At El Cent"o, the pr"clplLatlon lias ".88 lnch"o. a~ou~ 19~J of the ~8-year a.er~g~; and tn MeHcall lh"
<br />annual preclpltatl"n ""s 3.82 Incnes, 12~~ of th~ 53-year av~rage. The total flo", of tne Nell River at ~he
<br />intern3tlonal boundary In ln8 lIa, 98,"00 .1cre-feoel, IIhich lias about 122$ of th~ 19~)-I~78 no"",!.l.
<br />
<br />Salton Sea
<br />
<br />During lng, tne average annu"l le"peraturp arouno1 ln~ :inl~on 3~a ",a" tbout lOOJ of the lon,,-t~rm a_erage.
<br />",1'111 eo ~~~ .1nnua 1 preC Iplla tl on recor1ed at Br"",ley, Ca L tfom la, ",a, .1pprox !mate 1 y 1881 0 I' th~ long-lerlll .."'an or
<br />?5~ lnch~~. The '"'t~r 'lUrfac~ of th.. Sal'.on :iea In''rea~,,d durin@, the l~ar. The maxim"", st;lge, 2?8.:! f~et
<br />belQII ..",an 3M level. wa~ r~oor'l~d May ~ to 15, tncl",.lVe. 7he ",Inlmu.. stag~, 22~." reet b~lo'" ",ean sea lev~l,
<br />lIa3 r"'corded October IiJ to Oecember6.
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