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<br />20 Chapter 5-Historical Salinity Conditions <br /> <br />l\,) <br />~ <br />(X) <br />~ <br /> <br />900 <br /> <br />.-.. <br />...l <br />';;, 800 <br />e <br />'-' <br /> <br />t> <br />]'700 <br />- <br />ell <br />en <br /> <br />- <br />ell <br />::l <br />l:l 600 <br />l:l <br />~ <br /> <br />500 <br />1940 <br /> <br /> <br />1950 <br /> <br />1960 <br /> <br />1970 <br /> <br />1980 <br /> <br />1990 <br /> <br />Year <br /> <br />Figure1.-Annual salinity at Imperial Dam (1941-89). <br /> <br /> 201 <br />'i:' 1 8 ~ <br />_~ 16 ~ 'A'VJ I \ <br />....... <br />.... <br />ell 14 ~ <br />a <br />'-' <br />~ 12 <br />0 <br />- <br />~ 10 <br />- <br />ell <br />;:l 8 <br />l:l <br />~ 6 <br /> <br /> <br /> <br />4 <br /> <br />1940 <br /> <br />1950 <br /> <br />1960 <br /> <br />1970 <br /> <br />1980 <br /> <br />1990 <br /> <br />Year <br /> <br />Figure 2.-Annual flow at Hoover Dam (1941-89). <br />