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Scientific Investigations Report 2007–5117

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

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Table 1. Numbers of sampling dates that depth-profile measurements were recorded and composite samples were collected, Upper Klamath and Agency Lakes, Oregon , May–October 1990–2006.

[Depth-profile measurements consist of water temperature and either dissolved oxygen, pH, or both; composite samples were analyzed for at least total nitrogen, total phosphorus, and chlorophyll a; see figure 1 for site names and locations; –, not sampled]

Site Number of sampling dates
1990 1991 1992 1993 1994 1995 1996 1997 1998
Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples
AN – – 10 10 11 11 13 12 8 8 13 13 – – 6 6 10 10
AS 20 18 9 9 11 11 13 12 10 9 13 13 12 12 11 11 12 12
CP – – – – – – – – – – – – – – 6 6 11 11
ER 25 18 11 11 12 12 12 12 12 12 14 13 12 12 11 11 12 12
ML 5 5 10 10 12 12 12 12 13 13 13 13 12 12 11 11 12 12
MN 21 18 11 11 12 12 13 12 15 18 14 13 12 12 11 11 12 12
NB 5 5 10 10 12 12 12 12 9 9 13 13 – – 11 11 12 12
PM 5 5 12 10 12 12 12 12 9 9 13 13 – – 11 11 12 12
SB 18 16 11 11 12 12 12 12 12 12 14 13 12 12 11 11 12 12
WB 5 5 10 10 11 11 12 12 8 8 13 13 – – 11 11 12 12
All 104 90 94 92 105 105 111 108 96 98 120 117 60 60 100 100 117 117
Site 1999 2000 2001 2002 2003 2004 2005 2006 1990–2006
Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples Depth profile Composite samples
AN 10 10 14 14 11 11 11 11 10 10 11 11 11 11 12 11 161 159
AS 11 11 14 14 12 12 11 11 10 10 11 11 13 13 12 11 205 200
CP 9 9 14 14 12 12 12 12 11 11 11 11 12 12 12 11 110 109
ER 11 11 14 14 12 12 12 12 11 11 11 11 13 13 12 11 217 208
ML 11 11 14 14 12 12 12 12 12 12 11 11 12 12 12 11 196 195
MN 11 11 14 14 12 12 12 12 10 10 11 11 14 13 12 11 217 213
NB 11 11 14 14 12 12 12 12 11 11 11 11 13 13 12 11 180 179
PM 11 11 14 14 12 12 12 12 11 11 11 11 14 14 12 11 183 180
SB 11 11 14 14 12 12 12 12 11 11 11 11 13 13 12 11 210 206
WB 11 11 14 14 12 12 12 12 11 11 11 11 13 13 12 11 178 177
All 107 107 140 140 119 119 118 118 108 108 110 110 128 127 120 110 1,857 1,826

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