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<br />N <br />0') <br />IV <br />w::. <br /> <br />THe net return per acre for the Imperial Valley as determined <br />by the Sun regional model was $132. The net return per acre <br />fdr each of the study areas was compared to the $132, and per <br /> <br />aCre penalty costs were determined in relation to this base <br />value. Tables 10, 11, and 12 shoW the conversion to direct <br /> <br />. ' <br />s~linity detriments per acre for each area. <br /> <br />3., Present modified acres which were the basis for prediCting <br /> <br />t~e total salinity effect in mg/l for a given area were based on <br />art average acreage projected by EPA for the time periods of <br />1960, 1980, and 2010. <br /> <br />Tije summary of the calculations for each area is given in <br />Table 13. The total direct salinity impact~ are $66,900 per <br />mg/l on an annual basis for 1,076,800 acres or an average ,of <br />i <br /> <br />$d.0621 per acre per mg/l per year. The indirect effects are <br />calculated as 62 percent of the direct effects. This factor <br /> <br />, <br />i$ taken from the EPA study which calculated the indirect <br />. <br /> <br />i~pacts by use of input/output analysis. The total impact of <br />salinity upon the agricultural users of the Lower Basi.n is <br />given as $108,400 per mg/l per year in 1912 dollars. <br /> <br />25 <br /> <br />" , ~ <br /> <br />.~ ,i .~;.,,~-,i;i; '" -.>'-'.;x-_. <br /> <br />