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<br />Co..." Ph"'lo-l'pm~am "~,, of Impcnal [)a.m. desUtln~ "orkJ, Im"""",l ();UU Camp. Xnalor Wuh Uam Iud R.....,,,,."'f..nd It..
<br />10,,~t pon,on of lmpcna.! It....r~oir _ SOl~ lhat 0"" 01 1M det,ll,n. balln. 11a. boooe'n drO<d up lor maont.","""" a.oIml)
<br />
<br />0181
<br />
<br />TilE PROBLEM
<br />
<br />Th. Colorado Il>~~. B.um ~noom""uo por'lKlnl 01
<br />......,11 U.let Tht Ii_... 00"" C1~'" I.~ m>.leo IrClm Iii
<br />I\c.d.....l~n 1II ColClBdo ro illl~nn'lIw m 1M Gulf of
<br />California in 1M R~publlC of MU1~C1, On 'U )OunwY.'1
<br />)0'''' ""'lh mbulu>e1 f,om W~om'n.. Vlab..nd .,."
<br />Mn,ro;flo""lbrClu/tbtIwGrandC.nYClII;.ndp.ovwlet
<br />llal~ bound.nn 10. 'Ii.~.da. "nLona. .nd California
<br />Tht''''er'J'''.kl.no''.nd,n'ulur.yean.lLu~n
<br />h,tUyaU_l~dtb'C1ucb.lon,bllloryof.pprClpN"on.
<br />.nd "",ot..UO...I""1 ilH;l\Jd~ actl.C<.om~cu.d.O"en..nd
<br />anml~"""lionall'Cill>,.no","coll<<\,...,lyu-Th~La..of
<br />lh.R",...
<br />"t>oultLalfoflMp'''cnloabnllyconocnlnll,on,nlllc
<br />CCllonr.do k,w,., Hoo~.r Uam ""..La.. V.p". Sc...da.
<br />lIalwbut.dlonalunr.JlOu......T1Icr.mIJn'n/tl1a.lfll
<br />m.o.n....ndua:d..'ndlQl~'nf,iu..1
<br />Hl~b !oahno')' ~on<cnlt.llon. mull f.om 1"0 5"n.,..1
<br />proa..... ..Il loa.d,n8and..lt con('Cnlrahon. Salt
<br />load,n~ 'nCrCil0.e3 lh. amounl o,..II.ddcdlO. Il".n
<br />amouotof".al.'.andullconccnlrallondccr......lM
<br />amounloldilul",n".I.r.ulllblcfu'.l',ename>un'ol
<br />."
<br />SpcaficaUy...llloadon,l,nlMColoradoR'\'C"l'u.m
<br />.c.uhin lhc.ddouonofltU"",al..lnfrom...lur.l.nd
<br />manmadcoour.... S.llconecnu.llon...uluonlbtructn
<br />...hnuYlllroughbtnefu;ulcon.umpt"-'lUCof"'alc...nd
<br />
<br />"lolal..1t load of.boul 9 m,lhCln I<>TIlannu.ally
<br />.otenn, L.kt M~..:f,nlMI.OlO1:rClllorad"R"., !\u,n
<br />adw....dyaffcctlmllr.than 18 m,lhonpcuplr.nd I
<br />milliCln.crnClfirnl\lll.dfatmllnd>nthctln'lcdSlalet
<br />O.rna....lntM ImoUnl of SSltO,OOOlbaocd C1nJ.nua"
<br />I9$Sccnll)...proje<.,.dto<>U:urforcacht.....ca..C11
<br />I mll-:l..llmpt'nall).ml"he:n...hllu~ canccnlnr.1Klnl
<br />....Chlbt8ntoI12Sm/t I. ran5"lu.ho"-lIonfo,urcI
<br />
<br />
<br />
<br />70%
<br />. "
<br />
<br />
<br />F,gure.1 Tou.llosonpc'mg linen.....
<br />
<br />
<br />U......lu'a'SClu.C..
<br />
<br />J7'-1'''gallCln
<br />
<br />", Ru...o"
<br />e"Oo,.t,rtO
<br />3...e.ort'h
<br />
<br />'''''''&1
<br />
<br />record b.ghno,"" hu. Ou.thc:d and fillcd 1M rMjO'
<br />.rle",C1in.....ult'n"nllgr"rlClnll~lll101:...linilykvcb.1
<br />Impenal D.m-from all annual....rall" of 821> mI.' l in
<br />19\1~toN>llmK;l(r.C1.II,onaJl'n I9\lS_ WilhoutroolTol
<br />.......u...... bo_.r.. 1M conocnlr.uon JI p'C1JC'C1rd III
<br />'ncfUK.lollll....ngIMo...raJl rum,ttcnd .ho"ll in f'iiU'"
<br />2.pon,bly rc,,-,b.nll" le,..lof IOO~m,.I...t hppcnal
<br />Dam by.lK1l.u201O
<br />. Thccu....nl p'C1)<<'l.C1n..from 1985 (.alualllm of
<br />Sa~nI\~ Cantrol PrOgr.tnllD lb. Coloradll R,...r BuIll
<br />
<br />"r-
<br />_...,..~,"
<br />;:: :I---."j"'"
<br />.......
<br />. '-1
<br />
<br />-,
<br />I
<br />
<br />Fl'tlfC I Salt 10ld'flI 'ou....
<br />
<br />u"""....lcd ot...mflo" d.plcl'o....ntht B...mthu
<br />ronccntral.lht...hburd.nlfllo.In",'C1lumcClf"'.lCf
<br />GCMnr.lly.IM.pplicauonofunplilln".lcr",u\Il,n
<br />onc.....<!uill""'d,n/tbtcaUKofllllllcachln'.nd'hc
<br />con",nl'.lln,df<<llofron.ump"'-'UK 1bcIOl.l..11
<br />conccl>U.tKlI> In lhc n... OUCluatet .nnuall~ "'0111 lhe
<br />o,..r.lllla.,n "'II.r IUPP~'
<br />T1>c Colll.ado R'...r..1 'u btad...l.n In lb. mounla'",
<br />C1lnor'lh-antr.ICalonr.do.ILu...hn,ly!dl..lll,..r
<br />mUIC..lllconconlf'1111Cln C1f C1nl)' about ~mll.
<br />Im,lhlttitrU 1""' lMr}. Th~..lrnUY(llflC<:nt"liD'"
<br />p.og...."..ly'ncfa..ulbtn...'n.,""do".".I!Uon...
<br />fTlultol"..lc'd'..n;on....porallllnfromrnc...olT1.
<br />andUl1 C<lnlnbUlllln.flOm...ncl~C1rOOur.... Rc<<nt
<br />
<br />1"hc1o...........lI.lcd"llbmunu;lpollnd'ndu.ttnaluK
<br />lXCU'pnm.onlylrClm,nc...scd_IC.lrcau".nlC<l'I..
<br />.=I.nu<dplpcd.tcnorallon.nd.pphancc".....
<br />>n=ascd.oap.nddl1('lJCnlnrtd.,.nddcacaoed"a'~r
<br />~IaLabll11~ "ecord,n, 10 lhr EPA IEn'~'onmcnLaI
<br />P,,,,~io""lI"nc)')"al..nand.o'dl.publ..dnnk'og
<br />'ul.' ,houldrol>l.,n no mo.. lllan 500mg I. 01 ms
<br />llCllaldl1..,i\-.dlohd.)
<br />~or tmpl<>n. lhe: Iu~, ..~n'ly cofl<J<nlra!lon. caUIe
<br />lowcrcmf')'lCld...II.rcdcropp.\ll..n..h,pw,rlc&chln,
<br />.nd dralPa,", '.qulnmcnll. .nd ,,,,her m.o.n....mcm
<br />~llIt. AKn(u!lufalllllln(clll'wrlh'""gh 10....... y..ld. or
<br />h,Jhc' p,oo\JC\,on mana,",,,,,,nl COllll MtiD "'Mn
<br />...linll).1c..llofapphcd.mplllln....lr....ch1OOIOMloO
<br />m, L.. d.rcnd",~ upon IlI11 cond'l1llfll and Iypc of crop
<br />1'0"'1> '..."mm.o.f)C1ftMcff~...p....n'<'dbclo..
<br />
<br />m,l
<br />
<br />Eff<<l
<br />
<br />.
<br />,
<br />
<br />
<br />;/4
<br />
<br />IIcIo"m
<br />'bo~. <,0(1
<br />"'OO-~SO and
<br />at>o..
<br />
<br />Ge><>d dnnkln~ "'.ter
<br />\lunicJpol.nd,ndUllTlallouc.
<br />_'gr>cullur.llM....
<br />
<br />ant'.
<br />
<br />"";-
<br />-
<br />
<br />'W .'" ""'" .....
<br />
<br />Inthclarrl~.Jandr.'1)197O"1.leadc...'tM
<br />,CF:\On.ll.nd....1Klna.llr...bbcpnto....ojlTllrcthc
<br />p'Clb\cm.nd lolttk ..,h"",...
<br />
<br />.,-
<br />
<br />....... '_0"
<br />
<br />F"u.. J H..roncal .nd prlljK!cd ...hn"~ conccn.
<br />ltaU"n..\ Impcnal Dam
<br />
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<br />
<br />Effr:ctofoalICln'mptrdlando
<br />
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