Scientific Investigations Report 2006–5209
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5209
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 |
U.S.
Department of the Interior | U.S. Geological
Survey
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