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<br />5 <br /> <br />ij~ 2~' <br />4 <br /> <br />Cations <br />IZ2l SODIUM <br />~ MAGNESIUM <br />~ CALCIUM <br /> <br />Anions <br />ill] CHLORIDE <br />c:J SULFATE <br />D BICARBONATE <br /> <br />0: <br />z~ <br />0_ <br />~~ <br />"w <br />~c.. 3 <br />Zu> <br />w>- <br />oz <br />zw <br />o~ <br />o~ <br />z- <br />Qa <br />d::!::!:! 2 <br />Q;j <br />"" <br />";;: <br /> <br /> <br /> <br />o <br /> <br />&~~ <br />o~ <br />" <br /> <br />-:i.\~,1J. <br />~~ <br />0,,,0 <br /> <br />,OQ <br />~'b-'S' <br /> <br />"r}~...?J. <br /> <br />(..~e, <br />0'~ <br /> <br />60 <br /> Cations Anions <br />50 EZI SODIUM m CHLORIDE <br /> EJ MAGNESIUM IS'I SULFATE <br /> ~ CALCIUM fill BICARBONATE <br />40 <br /> <br />0: <br />z~ <br />Q::i <br />>-0: <br />"w <br />\0,,- <br />zu> <br />w>- <br />oz <br />~~ 30 <br />o~ <br />55 <br />_0 <br />ri:!::!:! <br />o~ <br />~~ 20 <br />;;: <br /> <br />10 <br /> <br /> <br />. <br />;;; <br />u <br />o <br />Z <br /> <br />o <br /> <br />~o rz-'11 <br /><?,l; ~'3-~ <br />0-\~'0 <br /> <br />",,~ <br />~flJl; <br /> <br />o\~ <br />0" <br />'?-O'" <br />;0,0 <br />Q". <br />'O~ <br />0,0 <br /> <br />O~0 <br />t-.:!oO'" <br /> <br />UPPER ARKANSAS RIVER <br /> <br /> <br />... <br /> <br />. . <br />~ ~ <br />u u <br />o 0 <br />Z Z <br /> <br />.o~ <br />s~~ <br /> <br />~..;.v.\0 <br />~0~ <br /> <br />01;0 <br />~'b\~ <br /> <br />G~ <br />vo~ <br />v~ <br /> <br />~?J.~6 <br />QO<' <br /> <br />,~ <br />~..)(;;' <br />,,~ <br /> <br />LOWER ARKANSAS RIVER <br /> <br />j <br /> <br /> <br />o~<$' <br />~\~ <br />v~ <br /> <br />. <br />;;; <br />u <br />o <br />Z <br /> <br /> <br />0" <br />." <br />'?-O'" <br />~\~ <br />~~ <br />':Jo'0~ <br />'O~ <br />0,0 <br /> <br />~'" <br />~,<$' <br />"'~ <br />,,~ <br /> <br />~'" <br />+-?J.f;o.":J <br />~\~:l~)e" <br />vOO <br /> <br />Figure 5. Comparison of median concentrations of six major ions in the Arkansas River, April 1990-March 1993. <br /> <br />WATER QUALITY 13 <br />