Relation Between Selected Water-Quality Variables, Climatic Factors, and Lake Levels in Upper Klamath and Agency Lakes, Oregon, 1990

Scientific Investigations Report 2007–5117

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

Table 10. Percentage of pH values in the depth-profile dataset greater than 9.7 by year and site, Upper Klamath and Agency Lakes, Oregon, May–October 1990–2006.

[See figure 1 for site names and locations. –, not sampled]

Year	All	AN	AS	CP	ER	ML	MN	NB	PM	SB	WB
1990	17	–	47	–	7	6	15	0	23	19	17
1991	13	16	18	–	3	13	8	24	8	16	29
1992	11	24	17	–	9	2	9	10	10	11	8
1993	6	23	22	–	0	0	5	0	8	0	8
1994	16	17	25	–	11	17	9	22	24	15	29
1995	16	16	22	–	5	19	10	32	38	8	17
1996	6	–	26	–	2	5	4	–	–	5	–
1997	9	5	6	0	5	14	2	21	14	10	18
1998	3	9	13	2	2	2	0	3	5	2	0
1999	15	26	21	13	4	23	12	17	18	9	21
2000	16	4	14	13	17	21	15	19	23	14	28
2001	13	6	6	6	2	17	12	24	29	8	38
2002	6	13	14	6	1	0	6	8	3	5	19
2003	11	20	30	2	4	9	3	24	17	3	23
2004	11	24	31	4	2	13	14	15	6	3	21
2005	2	10	8	0	0	0	2	0	0	6	5
2006	18	18	3	21	12	16	20	16	18	22	36

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