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<br />D. salt Load Reduction Objective <br /> <br />To maintain the average salinity level at 879 mg/L at Imperial Dam in the <br />future, additional salinity control measures are needed beyond those which are <br />in place. To estimate the salt load reduction needed by the year 2010, the <br />data from the 15 runs of the model were analyized statistically. The results <br />of this analysis are shown in Figure VIII-4. <br /> <br />~ <br />00 <br />W ~ 1000 <br />t--.t. ...1 <br /> "'- <br /> a 900 <br /> ......., <br /> 1>\ 800 <br /> ~ 700 <br /> UJ <br /> 600 <br /> 1980 1990 2000 2010 <br /> <br /> <br /> <br />Year <br /> <br />Figure VIII-4. Mean annual salinity at Imperial Dam (1986-2010). <br /> <br />The average salinity at Imperial Dam is projected to reach about 963 mg/L <br />by the year 2010. Using the salinity projections at Imperial Dam, the salt <br />load reductions needed to reduce projected salinity levels to the numeric <br />criteria level of 879 mg/L were estimated to be 1.09 million tons per year by <br />the year 2010. The required salt load reductions are in addition to those <br />already removed. <br /> <br />It is .important to understand that the salt load reduction projection is <br />very highly dependent on the rate of development in the Basin and will change <br />as rapidly as the depletions change in Table VI-1. For instance, if the price <br />of oil were to go up, oil shale development, which has been postponed by a ' <br />decade due to the low price of oil, may suddenly take off again. This would <br />increase the need for more salinity control. Or, conversely, development of <br />water resources may decline, reducing the need for salinity control. However, <br />this is less likely than it was 10 years ago, since most all of the optimism <br />in the development schedule has been removed. <br /> <br />VI II-6 <br />