Scientific Investigations Report 2006-5188

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006-5188

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Table 4. Comparison of trace-metal load estimates for water years 1999–2001 (this study) with estimates by Clark (2002) for nine streamflow-gaging stations in the Spokane River basin, Idaho and Washington.

[All values rounded, in kilograms. Abbreviation: na, not available]

Water
year		 Canyon Creek   Ninemile Creek   Elizabeth Park   Amy Gulch   Pinehurst
This
study		 Clark
(2002)		 This
study		 Clark
(2002)		 This
study		 Clark
(2002)		 This
study		 Clark
(2002)		 This
study		 Clark
(2002)
Annual dissolved cadmium (DCd) load
1999 640 590   240 220   1,600 1,400   54 59   3,000 2,300
2000 580 590   220 220   1,300 1,300   47 50   2,600 2,600
2001 350 380   100 120   700 680   16 18   1,300 1,300
Annual total cadmium (TCd) load
1999 660 640   250 240   1,800 1,700   30 64   3,400 3,600
2000 600 640   230 230   1,500 1,500   41 50   3,000 2,900
2001 360 390   110 120   690 680   18 15   1,400 1,300
Annual dissolved lead (DPb) load
1999 1,400 1,300   480 450   1,300 1,600   98 91   2,700 2,600
2000 1,000 1,000   410 380   1,000 1,100   77 73   2,100 1,900
2001 530 500   170 160   540 450   20 20   1,000 950
Annual total lead (TPb) load
1999 10,000 11,000   2,600 2,400   23,000 26,000   910 590   64,000 60,000
2000 5,000 5,400   2,000 2,100   16,000 15,000   1,000 500   46,000 34,000
2001 1,900 2,100   390 500   2,500 1,500   64 64   5,100 3,900
Annual dissolved zinc (DZn) load
1999 83,000 86,000   41,000 36,000   250,000 200,000   16,000 16,000   430,000 420,000
2000 91,000 86,000   37,000 35,000   200,000 190,000   14,000 13,000   380,000 380,000
2001 54,000 54,000   16,000 19,000   100,000 100,000   4,800 4,500   200,000 200,000
Annual total zinc (TZn) load
1999 81,000 86,000   41,000 38,000   260,000 230,000   18,000 15,000   490,000 500,000
2000 78,000 86,000   38,000 38,000   210,000 210,000   16,000 14,000   430,000 420,000
2001 48,000 54,000   16,000 19,000   100,000 100,000   5,000 5,000   220,000 200,000
Water
year		 Enaville   Harrison   Post
Falls		   Long
Lake
This
study		 Clark
(2002)		 This
study		 Clark
(2002)		 This
study		 Clark
(2002)		 This
study		 Clark
(2002)
Annual dissolved cadmium (DCd) load
1999 58 73   3,400 3,500   1,400 1,800   1,000 950
2000 52 64   2,800 2,800   1,300 1,500   860 950
2001 19 25   1,100 1,000   460 450   na na
Annual total cadmium (TCd) load
1999 73 100   5,100 4,500   2,100 2,300   980 950
2000 71 95   4,400 3,500   1,900 1,900   900 860
2001 19 28   1,400 1,300   590 540   na na
Annual dissolved lead (DPb) load
1999 150 180   23,000 17,000   1,700 2,800   4,400 4,500
2000 150 170   20,000 15,000   2,200 2,700   3,500 1,900
2001 60 50   6,400 5,000   710 590   na na
Annual total lead (TPb) load
1999 3,200 2,900   250,000 210,000   20,000 21,000   11,000 11,000
2000 4,700 4,500   320,000 240,000   18,000 19,000   11,000 10,000
2001 440 160   37,000 40,000   4,300 4,000   na na
Annual dissolved zinc (DZn) load
1999 13,000 10,000   580,000 540,000   470,000 450,000   280,000 270,000
2000 11,000 9,100   500,000 450,000   420,000 400,000   250,000 260,000
2001 3,800 3,100   220,000 210,000   130,000 130,000   na na
Annual total zinc (TZn) load
1999 22,000 22,000   760,000 680,000   480,000 450,000   330,000 340,000
2000 20,000 20,000   660,000 540,000   440,000 440,000   350,000 330,000
2001 5,300 5,300   220,000 220,000   140,000 150,000   na na

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