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Scientific Investigations Report 2007–5117

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5117

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Table 7. Summary of dissolved-oxygen concentrations in the depth-profile dataset, Upper Klamath and Agency Lakes, Oregon, May–October 1990–2006.

[Values are shown as the number of samples, whereas the percent < 4 milligrams per liter (mg/L) is shown as a percentage; shading is used to aid the visualization of the increasing percentage of values less than 4 mg/L. <, less than; ≥, greater than or equal to; –, not sampled]

Year May June July August September October
All values Values ≥ 4 mg/L Values < 4 mg/L Percent < 4 mg/L All values Values ≥ 4 mg/L Values < 4 mg/L Percent < 4 mg/L All values Values ≥ 4 mg/L Values < 4 mg/L Percent < 4 mg/L All values Values ≥ 4 mg/L Values < 4 mg/L Percent < 4 mg/L All values Values ≥ 4 mg/L Values < 4 mg/L Percent < 4 mg/L All values Values ≥ 4 mg/L Values < 4 mg/L Percent < 4 mg/L
1990 38 38 0 0 80 80 0 0 93 82 11 12 49 42 7 14 57 50 7 12 71 71 0 0
1991 – – – – 68 68 0 0 54 54 0 0 89 88 1 1 53 51 2 4 45 39 6 13
1992 67 67 0 0 63 63 0 0 89 78 11 12 51 40 11 22 28 26 2 7 45 45 0 0
1993 41 41 0 0 121 121 0 0 83 83 0 0 69 51 18 26 65 49 16 25 62 60 2 3
1994 81 81 0 0 73 73 0 0 47 47 0 0 56 38 18 32 49 49 0 0 34 34 0 0
1995 117 117 0 0 75 75 0 0 71 65 6 8 79 68 11 14 61 47 14 23 57 56 1 2
1996 24 24 0 0 47 47 0 0 45 41 4 9 43 43 0 0 38 38 0 0 56 51 5 9
1997 77 77 0 0 39 39 0 0 111 94 17 15 71 61 10 14 67 67 0 0 30 30 0 0
1998 43 43 0 0 127 126 1 1 71 57 14 20 73 53 20 27 71 70 1 1 70 69 1 1
1999 78 78 0 0 88 88 0 0 76 71 5 7 76 64 12 16 113 112 1 1 – – – –
2000 137 137 0 0 85 80 5 6 79 66 13 16 71 41 30 42 73 69 4 5 101 100 1 1
2001 83 83 0 0 79 79 0 0 116 110 6 5 72 46 26 36 71 51 20 28 34 27 7 21
2002 131 131 0 0 86 82 4 5 77 62 15 19 70 62 8 11 30 30 0 0 31 31 0 0
2003 45 45 0 0 86 86 0 0 118 90 28 24 71 64 7 10 66 57 9 14 27 26 1 4
2004 88 88 0 0 83 83 0 0 79 69 10 13 71 54 17 24 98 93 5 5 – – – –
2005 141 141 0 0 93 93 0 0 82 73 9 11 107 92 15 14 70 70 0 0 34 34 0 0
2006 90 90 0 0 88 88 0 0 112 103 9 8 70 65 5 7 63 63 0 0 30 28 2 7

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