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<br />llilsod 011 the dril~rill~] level,; of TDS at each of <br />theso points.! <br /> <br />Tho <:lg~Jrc~J(-lt(' d;JJllC1QC function is of the fOITTl <br />l\." Y b(!IJX when, Y is the estimated damages in <br />m 1970 dollars per milligulrn per- lite-H, b is tho <br />vI "yil1tclccpt," "'S the COn51aI112./18281828. <br />.....< {II is the slope oj Ih" curvo, and xis the TDS level <br />for which darrli:VICS arc being estimated. It was <br />mentioned cClrlier that sever-a I levels of TDS exist <br />concLJru~ntly ;-md All must be ti'lken into account <br />when cOflsich-:rillq tlw un'mn l.ower Main Storn. <br />KGopinq this in [Ilind, tlw flJnctioll is based on <br />pertinent info! rn;ltiofl frotT1 i.rlble :2 which definos <br />the salinity rilri-lllletms i-or- the v8rious points of <br />diversion. In i ho nq!wtioll, x corresponds to the <br />level of T DS 01 Imp81ial Dilm al1d damages fOI <br />other areas hi-lve hOAn (JoJlIstod to correspond to <br />resultin~l level:-; oj -r DS when x is defined elt <br />Imporial n8rll lht; l-esultinQ answer is an <br />estimate of 8CJI iClIltlJral rlarnages of the Lower <br />!\l1ain Stern, <br /> <br />Tnble J contiJlrlS clggrcgatE-: damage estimates <br />for various levels of lDS ,-Jlung the river in dollars <br />(19/6) pel ITlIlli[jlalll pm Iller. For computation <br />of values not contained in the table, the values <br />of tho coefficients (lr8: <br /> <br />b E19.70Ht1537 <br />o 7.7187B 1lI7lJ <br />f)) 0.0051,JI3 <br />x -- desir-eel I()vd of ID~) <br /> <br />AIlCJorSDrl And KIr~innH-Jrl(; should be consulted for <br />more dC1ailtHl inform(ltion concorning the <br />dls.?lg~lr8~J(-jL{)li d()fl]a~lC functions of the <br />indivlduill (JrC:J:;. <br /> <br />f-_L Indirect Agricultural lhunage~ <br /> <br />Agriculturul CCOI10fll!C irnpCl(;ts include not only <br />the direct dPllllaqos hut also changes in outputs <br />and incomes ~!f-)nprclt8d hy sectors of the <br />regional 8conomy which provide supplies for or <br />are dependent u[1on outputs of the agricultural <br />sector. The tool.'; of nnalysis to trace these <br />inrlirect nffocts have heen 1..0 (input-output) <br /> <br />" 1>i-Hk("!I" Drltn fUrlrllflqS correspond to the water supply fOI <br />the Califomld CO<'lst;tI me<-l. Central Arilona PI-ojeet servico <br />al(~a, arld the Colorado River Indian fleservatioll; Palo Verde <br />redoing:> relatn to Ole Pilla Verde Irrigation District; and <br />Imperial D(lln rOildill\I.<> reli-ltu to Imperial Valley. Coachella <br />Valley. Welllol1-fvlolwwk \/i-lll{)y, Gil,-! area. and Yuma Valley. <br />" Ibid.. app 3, p_ 1 'J 7--)[')/ <br /> <br />models of the California-Arizona regional <br />economy. While regional output and income <br />changes are not necessarily the sallle as net <br />national changes, they are extremely important <br />items of information for the public <br />decisionmaking process. I-he two-state. <br />77-sector, 1-0, and trade model constlucted by <br />Ireri and Carter in 1970 was updated to 1974 <br />price levels. Regional income losses are <br />c)pproximated by changes, direct and indirect in <br />payments 10 the household-government sector. <br /> <br />11 should be remembered thal the basic 1.0 model <br />is static Elnd assumes a fixed technology. Thus, <br />investment demands, both public and private, <br />which may be generated by adaptations of the <br />regional economy and by fallll managers to <br />changing salinity conditions are either ignored or <br />taken into account in some ad hoc way. <br /> <br />flegional income multipliers estimatG the dollar <br />reduction in payments 10 households and <br />uovernments for each dollar of direct income <br />loss in agriculture. For this study a multiplier was <br />derived from the work on indirect economic <br />impacts reported in Andersen and Kleinman.' <br /> <br />lhe direct agricultulal damages were not <br />ilvailable for the primary 1-0 runs as reported in <br />ihe above-cited study. hut subsequent analyses <br />were conducted by the University of Colorado to <br />provide .the needed data. <br /> <br />Changes in total gross output from the LP runs <br />were used as inputs into the 1-0 model to <br />eslimale multipliers to apply to changes in direct <br />damage estimates. <br /> <br />lhe original analysis estimated the regional <br />income losses shown below: <br /> <br />IIlg/l. <br />- ---~------- <br /> <br />l.oss per mg/L <br />-- ~----- <br /> <br />900 to 1100 <br />'1100 to 1200 <br />1200 to 1300 <br />BOO to 1400 <br /> <br />$ 80,000 <br />239,000 <br />290,000 <br />643,000 <br /> <br />The ensuing parlial analysis performed for Water <br />and Power Resources Service using the <br />l.P-derived change in total gross output provided <br />singular estimates of "multipliel's" lelating <br />regional income loss to dimcl agricullural profit <br /> <br />7 Ibid.. p. 1-39. <br /> <br />9 <br />