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<br />,. /': <.~> .. <br /> <br />~' <br /> <br />"l11 <br /> <br />. , <br />., <br />. J <br /> <br />I <br />,.i <br /> <br />.:::.. <br />N <br />.:::.. <br />....} <br /> <br />SECTION 7 <br />ANALYSIS AlIIlRESULTS <br /> <br />. There is a lac.k of good data outsid.. of the Grand. Valley for the irri- <br />gated aress in the Upper C~lorado River Basin. In sddition, th..re is substan- <br />tial uncertainty a..sociated with projections of fut:ure c1ev..lopm..nt:s and their <br />anticipatecl water c1emancls. Nev..rtheles$; decisions must be mad... and salinity <br />control programs dev..loped using thes.. data. The results generatecl by these <br />caicula~ionssugge.t a founclat:ton on ~hich to formu1at:.. a basin-wide salinity <br />c~lltrol program. The analysis presented in. this t.xt demc>nstrates the pro c.'" <br />dur,\s ancl c1stanecessary to determin.. the moet cost-..ffective basin-wide <br />pro"",am. <br /> <br />PROCEDURAL CONSIDERATIONS <br /> <br />Once th.. hydro-ssl:l.nity evaluation of a river basin is completed, it is <br />only n..cessary to define the first level cost-..ffectiveness parameters for <br />each area b..forethe entire basin-wide analysis of th.. second, third ancl. .. <br />fourth levelcost~effectiveness .functi~ns are only mathematical extensions of <br />the Level 1 optimization. Figure 21 depicts the simplicity of this methocl- <br />ology. This easily applied proceclure is further illustratecl by the fact that <br />the entire analysis was performed using a sm;all desl<...topcomputer. w:tth1ess <br />than 24,000 bytes of capacity. . . <br /> <br />Throughout this ..nalysis average v..lues were used to represent the general <br />conclitions of each canal end/or area. It was further assumecl that: the ground- <br />wster salinity concentrations would remain unch..nged as a result of any salin... <br />ityconerol program. January, 1980, costs snd ..stimates of conditions were <br />usecl throughout the development of th..e .resu1t.. <br /> <br />c. Sal:l.nityis b..sically a cons..rvat:ivepollutant, ancl' it wasassumeclthat <br />the problem could be linearly c1ecomposed into various levels in orcler to <br />....;, 'ar.r':!.J7.e' .at a bas.<lJ1-.wlcle' salinity..controi..strat..gy....,:.!bIL1,4ck of,physical intar- <br />. actio!\ ancl wster utilization pTactic.... betw..en the various areasclelineaied. by <br />.,PL 93.:~20 facilit...ted this analysis.. <br /> <br />The Grancl Valley of west..rn Colorado was usecl to verify thes.. procedures <br />and assumptions because it is the only area in the Upper Basin where suffi- <br />cient data ar.. available to p..rmit this type of analysis. Also, the Grancl <br />Valley is geologics11y and topographically similar to the other large agricul- <br />tural salt producing areaS in the basin. For example, fielcl sizes are gener- <br />ally small with moclerate slopes and have soils with low water intal<e rates. <br /> <br />70 <br /> <br />. <br /> <br />. <br /> <br />'-..,..,..,'.. <br /> <br />, <br />