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<br />f-4 <br />N::.. <br /><:) <br />f-4 <br /> <br />879 mg/l numeric criteria <br />a <br />/I <br />. <br />" <br />, . <br />" <br />, <br />I , <br />. . I . . . . . . . <br />, <br /> <br />20.000 <br /> <br /> <br /> 15,000 <br />Ci:' <br /><C <br />0 <br />0 <br />0 <br />:::. <br />;: <br />0 <br />ii: <br /> 10.000 <br /> <br />I <br />I <br />I <br />'. .'. . . ! .. .1 . . . . . ~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . f . . <br />,,' 'I \ " I <br />'. \ "+--Flow , I <br />I <br />" I <br />" I <br />", <br />I " <br />'" , \ I <br />',..,-,-" ~ <br /> <br />\ , <br />\ I <br />\ , <br /> <br />, <br />, <br />\ <br />\ <br />\ <br /> <br />v <br /> <br />. \ <br /> <br />900 <br /> <br />850 <br /> <br />800 <br /> <br /> <br />5,000 500 <br />1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 <br />Year <br /> <br />879 mg/L numeric criteria ... ... ... ... ... ... . <br />.............. ... ......................... .;,..,:.:,........... ......., ... <br />...-_... <br />... ... ... ... ... ... ... ... ... ... ... ... '\ without additional controls <br /> <br />Figure 4.-Colorado River at Imperial Dam. <br /> <br />1,000 <br /> <br />gOO <br /> <br />:::;- <br />- <br />'" <br />E 800 <br /> <br />.-- <br /> <br />/ <br /> <br />'" with additional conlrols <br /> <br />~ <br />:~ <br />'iii <br />en <br />c: 700 <br /><U <br />'" <br />::; <br /> <br />600 <br /> <br />500 <br />199o <br /> <br /> <br />1995 <br /> <br />2000 <br /> <br />20D5 <br /> <br />Year <br /> <br />Figure 5.-Projected salinity concentrations at Imperial Dam. <br /> <br />2010 <br /> <br />2015 <br /> <br />9 <br />