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<br />COlllfiADO RIVER ~~M,lNTn l'r.fmL1~w:'I,
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<br />By
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<br />~yron B. Uolburt, Chief Engineer
<br />." Colorado River Board of California
<br />
<br />F:ccent:ly the Colorado River Board of enJ lfonl-o<l issuf'cl a rt>port
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<br /><.',1. (tl'ed "i'lopel for Controlling Sulinity of the Colorado River." The
<br />purposes of the report were to evaluate present and future salinity
<br />of the riv(,r and indic:\tp WIYS to a11c'viate damagi.ng salinity comli-
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<br />tLons.
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<br />1>lli'orn;,n'~, vi::,j, io(('1"':,1 i.n the rivcr's salinity is apparent
<br />
<br />whpl1 it 10 t'l.cognlzcd that npproximately 80 percent of the water con-
<br />!'lllll1ptivcl y llsed 'in ~;ontllct'n Cal.U'ornia ComNl frOlI1 the Colorado River.
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<br />Tll(( ''';It,,!., is used [or in:ieution of Il('arly '100,(1)0 aereli ill ImJll'I'1.lIl,
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<br />Co,wlwJla, Palo Verde', ,,,,c1 Yuma Valleys in Cal :cfornia, and as l1
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<br />supplemental sup"ly for over 10,000,000 people in coastal Southern
<br />
<br />California,
<br />
<br />Present S()U~~_01,-.~,ll;j;'~ 1.t,.;L
<br />
<br />Thr s<1linity of the Colorado River is considerably higher than
<br />that o[ 1009t mujor rivenJ. It is ('stimated that in itl'; naturnl state
<br />the river' I; di13so1 verl mineral 1.0;,(\ averaged 'JDout 5.1 million tons
<br />per year at Lee Ferry, a point in northern Arizona below Glen Canyon
<br />Dam. i\bout no percC'nt of these salts are from diffuse sources and
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<br />, ""'.'" ~ . ".' ",," ":,'''' -, ,'-" .
<br />about 70 pC'rcent an' [rom 'n,ll:l11'dl po.!ni: nourccs, such as mineral
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<br />uprlngr: and cl{posed highly $olubJ" m\;'(',dI t:onnations. There h'lS
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<br />,"Pn'sented to the Pacific Southwest lrJtlter Committee of the lrritntion
<br />'. Districts ASDOcil1t:i.on of California nt Los Angeles, CaltLornia, on
<br />December 3, 1970.
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