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<br /> <br /> <br />w <br />C <br />f- <br />.... <br /> <br />COOlX:riltlon wirh the Unlvetsi!y 01 WYOming. This <br />pilOt operatIon will SUpply needed mlo,mdllU'- <br />rl1gardlng the CilP<lbil,ty of freeling, ettt'cliveness of lhe <br />Sprinkler '-'qu.pmt'f1I and COnfiguration lor best i~ <br />formation, the amOUnt of sdll that can be removed. <br />qUell;!\! of the prOdUct \Valer. CDS! per ton of S(!lt <br />remOVal, and environmental impdCI of the process. A <br />ff.-asibtlit\i report is scheduled 101 fiscal year J 978 <br /> <br />Thl.' POlentla) of trea['ng or converting irrigation return <br />flows to Other beneficia) consumptive uses such as <br />thermal DOwerp1ilnl COoling and coal gasification <br />wIthin rhe bdsm to avoid returnmg them to the liver <br />sYStem IS being ell;amrned. The San Juan area wiil be <br />Studied In Fy 1974 and 1975 to be followed by Ihe <br />Grand Valley area in 1976 dlld 1977. Utilization of <br />return f!Gws will be in~estlgated in the lower main stem <br />durmg the fiscal 1974-78 period. <br /> <br />UTILIZING RETURN FLOWS <br /> <br />McElMO CREEl( UNIT, COLORADO <br /> <br />McElmo Creek is tributary to the San Juan R'~er n~ar <br />the COlorildo.Utah State lint.'. Although the dralnagt.' <br />area is only 350 square miles, thl' salt loadmg is <br />estImated to be 130.000 tons per year 01 which about <br />40.000 tons COuld be removed by selectj~(,' Withdrawal <br />imd evaPoralion or (It'saltmg The reSulting effect at <br />Imperial Dam is a concentration decrease of about 4 <br />my/I. <br /> <br />HL'/:\HCI/ <br /> <br />Rescarch IS underway on anI arm Irrigation effiCIenCies, <br />c1t'sa1ting lly natural freeZing. and modeling for <br />pr('dlCtmg salt and nUlrient loadmg. A COOperative <br />PIOgrdm with the Agr;CUlturill Research Ser~lce is <br />Underway in the Grand Valle,. art'a to determlnt' the <br />OPtimal "rogalion Wat~r application rales 10 maintain <br />crop yields whil~ reducing salt-laden return flows_ <br /> <br />0.: la collectIon began In 1972 and inclUdes <br />meilsurem~nts that will Id~ntlf,. lhe magnitude and <br />e/fects of returrJ flows Irom the .rrigalt'd areas near <br />Cortel. Recently, consideration of mitigation measures <br />fOI rhe Dolores ProleCt has I~d to the invl'stigation of a <br />posslule ImpoundmerJt and eVaporallOn of Mud Creek, <br />a lriuutary of McElmo Crl'ek. Feasibility Hudi~s 101 <br />McElmo Cleek Unit are 10 be completed In liscal year <br />1978. <br /> <br />COnSlderilble other sal,n,ly research has been <br />stlmulaled by Ihe CRWOJP. This reSearch IS providing <br />Inputs 10 Ihe Plogram but is being fund~d through <br />Oth~r SOurces. The Western DireCtOfs of the <br />AgtlCUltUfal E:>:petlment Stallons have established a <br />re9lOrlill reseMch project entitled "Saliflity <br />M,mil~('melll in the Colorado River Basm." This will <br />involve COOPcriltion with the USDA. The research is <br /><lImed at devt'loPlflg and evalUdting methOds for <br />U'ldt!rstanding .ond managing sallnlly from "'9"cultural <br />and diffuse natural SOurces in the COlorado River <br />BaSin. <br /> <br />PRICE, SAN RAFAEL. AND DIRTY DEVIL <br />RIVER UNITS, UTAH <br /> <br />The Price. San Rafael. and Ditty Devil Rivers otlginale <br />in the mOuntilins of lhe Wasaten and Aquarius Plaleilus <br />and are lributary 10 Ihe Gret'n ilnd Colorddo Rivers Irl <br />ea5l.CI;Hllral Utah, Ordinage areas COntalfl 1,500. 1.670, <br />and 4.200 squilre miles for the p"ce. S,lIl Rillael. ilnd <br />Dirty Devol Rivers, reSneCtivt'l,. The estimated lotal <br />diSsolved solids conlnbuted b~' tht' Price. San Rafael, <br />ilncJ Dirty Devil Rivers are 240.000. 210,000, and <br />200,000 tOns, resJ){'Ctively <br /> <br />The Otfl~ of Warer ResoUtCt's Research (OWRRJ IS <br /><tlso Sponsor,ng d regional reSearch prOjecl on salinity, <br />Through OWRA. sever ill COlorado Ri~er BaSin Stales <br />Willer Resources Researen Institutes are in~est!gating <br />the eConomic aspeCts 01 salinity COntrol, The research <br />is directed fOward evaluating damilges caUsed by <br />salinity. The Bureau of R..c1amatlon is Participating <br />Jnd COODelalmg Ifl the research dfort. <br /> <br />The eSllmated annuill lemovill ot salt b~' proposed <br />COrltrol programs are 100.000 Ions On the Price Rive, <br />illld 80,000 Ions t'ach for the San Rilfael and Dirt~. <br />Devil Rivt'rs_ Salinity concentrdtlons of Ihe Color;;do <br />River ill Impeflal Dilm WOuld be redu~d by iln <br />eUlmillcd 9 mg,'1 fOI the Price River and 7 mg'l lor <br />each 01 the Siln Ralill'! and Ditty Devi' Ri~ers. <br /> <br />A SpeClil) Study has been completed of the POtential <br />dflplicalion 01 ion e"change desalllng 10 the tOtal flOw <br />0' the Cololado River System_ The intenl of Ihls study <br />was to determine the POSSibilities of COlltrOlling salinity <br />al the diverSion point from the river rather than ilt Its <br />SOUrce. The Study was sUPPOrted by a 6-week <br />Uperal(on of iln ion e~Change pilot plant on the <br />Colorddo River below DaVis Dam. The 5.000-gPd plant <br />SUCCl'ssfully r('duced 750 ppm Water to 550 ppm <br />prOduct water. Furur(' Studies wiH concenlrale on <br />smaller installalions hilving plan I capaCities similar to <br />tile preSent major diversions. A repol[ COvering this <br />sludy was complet('d In 1972. <br /> <br />fnvest(gatlons thus far have included flt"ld surveyS, data <br />gathering, and tentative lormulalion 01 COntrol plans to <br />removt" Ihe conCentraled flows from these stre..ms <br /> <br />Feasibility repOrts are SChedUled tOr fiscal year 1978. <br /> <br />" <br /> <br /> <br />