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<br />through 1976, period of record (this is the same as <br /> <br /> <br /> <br />4 <br /> <br />period 1941 through 1967 at the 90 percent level of significance*. <br /> <br />This indicates a 90 percent or greater probability that the salt- <br /> <br />o <br />Co\.) <br />"-J <br />0) <br /> <br />load versus flow relationship for the 1968 through 1976 period is <br /> <br />different from the relationship for the 1941 through 1967 period. <br /> <br />4. Figure 3 shows the regression line for the entire, 1941 <br /> <br />as well as the regression line for the more recent, 1968 through' <br /> <br />1976, period. The 1941 through 1976 average 1976 present modified <br /> <br />flow is 4,622,000 acre-feet. For this amount of flow, the dif- <br /> <br />ference in salt loads computed by the two regression equations is <br /> <br />360,000 tons. This is equivalent to about 36 mg/l reduction in <br /> <br />salinity at Imperial Dam. <br /> <br />Green River at Green River, Utah <br /> <br />The 1976 present modified salt-load versus flow relationship <br /> <br />for the 1941 through 1976 period is shown on Figure 4. The resi~ <br /> <br />dual mass diagram is shown on Figure 5. <br /> <br />. <br /> <br />*The difference in means is also significant at the 95 percent <br /> <br />~;" 'J <br /> <br />" <br /> <br />~" <br /> <br />,JI <br />" .c.. ~~.i~..jl <br />