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Scientific Investigations Report 2009–5078

Assessment of Eutrophication in the Lower Yakima River Basin, Washington, 2004–07

Table 13. Linear relations between daily minimum dissolved oxygen concentration and maximum water temperature on the previous day, Yakima River at Kiona (RM 30), Mabton (RM 55), and Zillah (RM 87), Washington, March 1–September 30, 2004–07.

[All relations were significant (p≤0.001). Abbreviations: r2, coefficient of determination for linear relation]

Location and year r2 value
Kiona, 2004–07 0.85
Kiona, 2004 0.88
Kiona, 2005 0.94
Kiona, 2006 0.89
Kiona, 2007 0.95
Mabton, 2005 0.78
Zillah, 2005 0.83
Zillah, 2006 0.93

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201

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