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<br />substftuted where Judged appropriate. Detafled statements of assumptfons <br />and prOC:edures employed are provfded by Gardner. <br /> <br />w::- <br />~ 4. The model updates and extends the earl fer analysfs of Leathers and Young. <br />N <br />.~ 5. Cablegatfon fs a new technology, consfstfng of a movfng plug fn a gated <br />pfpe. The plug fs slowly released down the pfpe by a cable on an <br />automatfc winch, permitting water to flow out the gates fnto furrows as <br />the gates are uncovered by the plug. <br />6. The capftalfzed impact of changes fn net producer fncomes, not explIcItly <br />dfsplayed, would clearly be sfgnificant. <br />7. The technfcal optfons analyzed fn table 1 and the control strategfes fn <br />tables 2, 3 and 4 are all allocatfvely efficfent, fn t/'lat for each, net <br /> <br />socIal cost per ton of salt removed fs less than downstream damages <br /> <br />avofded. However, prforftfes for a basfn-wide polfcy should consfder the <br /> <br />cost effectfveness of abatement strategfes elsewhere. <br /> <br />8. Carrfed to fts logfcal conclusfon, a full Upper Basfn lfabflfty for <br />downstream sal fnfty damages would result in termfnatfon of frrfgatfon of <br />ffeld crops on the hfgh salt-loadfng lands characterfstlc' of the Upper <br />Colorado River Basfn. Thfs follows because, acceptfng our revfsed <br />estfmates of Lower Basfn Damages, the downstream damages of $26 per ton <br /> <br />($130 per upstream acre) are about 2.6 tfmes larger than the average <br />upstream net Incomes of $50 per acre. <br /> <br />23 <br />