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- W1971034640 abstract "Winter variations in water quality were investigated in an arctic and a sub-arctic river basin in the Yukon Territory. In both cases dissolved oxygen depressions were observed during the winter, a phenomenon which occurred at all stations where water was sampled under ice. Lowest values were measured in late winter when ice cover was most extensive and when concentrations of basic cations reached highest annual values. No direct relationship was observed between oxygen levels, ice thickness and ice type. It appears that as winter progresses the stream water consists more and more of groundwater which usually contains low oxygen levels. Because of ice cover during that period little opportunity exists for reaeration and, although river sections with open water showed slightly higher oxygen concentrations than under ice samples, such open areas were not sufficiently large for reaeration. Oxygen concentrations in groundwater thus have a profound influence on oxygen concentration in the streams, but groundwater is not the only cause as other factors such as oxygen uptake by suspended material and biota possibly contribute to the low overall values. Some of the data from this study are corroborated by similar findings in Alaska suggesting that natural oxygen depressions in late winter are a widespread phenomenon in northern environments." @default.
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- W1971034640 date "1980-01-01" @default.
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- W1971034640 title "Variations in water quality during winter in two Yukon rivers with emphasis on dissolved oxygen concentration" @default.
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- W1971034640 doi "https://doi.org/10.1016/0043-1354(80)90195-5" @default.
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