STATION LOCATIONS 



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 100 

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 120 



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z 140 

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FEBRUARY 9, 1966 



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JUNE 6. 1966 

 G ,^ 



^~~^— "— — — .-- 



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AUGUST 1,1966 



O 



OCTOBER 3, 1966 



Nitrogen gas soturation in forebay 



(overage of surface + lO-mefer samples) 

 O Nitrogen gas saturation in lailwoters below dams 

 Temperoture "C. (forebay at lOmeters) 



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160 320 480 640 800 



DISTANCE FROK^ MOUTH OF RIVER (KM.) 



960 



120 



Figure 3. — Saturation of dissolved nitrogen and temperature of samples in Columbia River from 

 Astoria to Grand Coulee Dam, February to October 1966. 



U.S. FISH AND WILDLIFE SERVICE 



