Scientific Investigations Report 2006–5209

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5209

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Table 6. Dates of low dissolved oxygen events in the northern part of Upper Klamath Lake, Oregon, 2002–03.

[Dates were determined using four criteria: 1, percentage of site-hours with dissolved oxygen concentrations < (less than) 4 mg/L (milligrams per liter) was greater than or equal to 20 percent; 2, percentage of site-hours with dissolved oxygen concentrations <4 mg/L was greater than or equal to 25 percent; 3, study area median dissolved oxygen concentration was <80 percent of saturation; and 4, percentage of site-hours with dissolved oxygen concentration <4 mg/L was greater than or equal to 50 percent]

Criterion Dates
2002 2003 2004
1 07-10–07-11
07-31
08-02–08-3
08-12
07-18–08-02
09-20–10-09
10-11–10-13
08-12–08-13
08-17–08-19
08-22
2 08-02–08-03 07-19–08-02
09-21–09-29
10-01–10-08
08-13
3 07-10
07-23
07-29–08-13
07-21–08-02
09-19–10-14
08-11–08-13
4 None 07-23–07-30 None

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