Scientific Investigations Report 2006-5188
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006-5188
Table 3. Estimated mean annual trace-metal loads for 10 streamflow-gaging stations in the Spokane River basin, Washington and Idaho, water years 1999–2004.
[Gaging station locations are shown in figures 1 and 2. All values in kilograms unless otherwise noted. Abbreviation: m3/s, cubic meter per second. –, no estimate]
| Water year |
Gaging station number and name | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 Canyon Creek |
2 Ninemile Creek |
3 Elizabeth Park |
4 Amy Gulch |
5 Pinehurst |
6 Enaville |
7 Harrison |
8 Outlet |
9 Post Falls |
10 Long Lake |
|
| Mean daily streamflow (m3/s) | ||||||||||
| 1999 | 1.7 | 0.5 | 12 | 5.6 | 19 | 64 | 86 | – | 210 | 260 |
| 2000 | 1.5 | .5 | 10 | 4.6 | 17 | 57 | 77 | – | 190 | 240 |
| 2001 | .9 | .2 | 4.3 | 1.6 | 7 | 22 | 30 | – | 76 | 110 |
| 2002 | 1.7 | .7 | 12 | 5.7 | 19 | 70 | 93 | – | 220 | 250 |
| 2003 | 1.2 | .3 | 7.2 | 3.3 | 11 | 39 | 52 | 130 | 130 | 160 |
| 2004 | – | – | 7.2 | – | 11 | 41 | 54 | 130 | – | – |
| Mean | 1.4 | 0.4 | 8.8 | 4.1 | 14 | 49 | 65 | 130 | 165 | 200 |
| Dissolved cadmium (DCd) load | ||||||||||
| 1999 | 640 | 240 | 1,600 | 54 | 3,000 | 58 | 3,400 | – | 1,400 | 1,000 |
| 2000 | 580 | 220 | 1,300 | 47 | 2,600 | 52 | 2,800 | – | 1,300 | 860 |
| 2001 | 350 | 100 | 700 | 16 | 1,300 | 19 | 1,100 | – | 460 | – |
| 2002 | 500 | 210 | 1,100 | 54 | 2,300 | 64 | 2,600 | – | 1,400 | 600 |
| 2003 | 400 | 130 | 880 | 34 | 1,700 | 36 | 1,600 | 960 | 890 | 370 |
| 2004 | – | – | 920 | – | 1,600 | 37 | 1,600 | 820 | – | – |
| Mean | 490 | 180 | 1,100 | 41 | 2,100 | 44 | 2,200 | 890 | 1,100 | 710 |
| Total cadmium (TCd) load | ||||||||||
| 1999 | 660 | 250 | 1,800 | 30 | 3,400 | 73 | 5,100 | – | 2,100 | 980 |
| 2000 | 600 | 230 | 1,500 | 41 | 3,000 | 71 | 4,400 | – | 1,900 | 900 |
| 2001 | 360 | 110 | 690 | 18 | 1,400 | 19 | 1,400 | – | 590 | – |
| 2002 | 530 | 250 | 1,200 | 70 | 3,200 | 108 | 4,700 | – | 1,900 | 830 |
| 2003 | 410 | 140 | 930 | 35 | 2,200 | 43 | 2,400 | 1,100 | 1,000 | 510 |
| 2004 | – | – | 970 | – | 2,200 | 37 | 2,100 | 970 | – | – |
| Mean | 510 | 200 | 1,200 | 39 | 2,600 | 58 | 3,400 | 1,000 | 1,500 | 810 |
| Dissolved lead (DPb) load | ||||||||||
| 1999 | 1,400 | 480 | 1,300 | 98 | 2,700 | 150 | 23,000 | – | 1,700 | 4,400 |
| 2000 | 1,000 | 410 | 1,000 | 77 | 2,100 | 150 | 20,000 | – | 2,200 | 3,500 |
| 2001 | 530 | 170 | 540 | 20 | 1,000 | 60 | 6,400 | – | 710 | – |
| 2002 | 840 | 390 | 950 | 120 | 2,000 | 260 | 27,000 | – | 5,200 | 2,800 |
| 2003 | 490 | 210 | 620 | 55 | 1,200 | 150 | 13,000 | 1,400 | 2,500 | 760 |
| 2004 | – | – | 580 | – | 1,100 | 180 | 13,000 | 940 | – | – |
| Mean | 850 | 330 | 830 | 74 | 1,700 | 160 | 17,000 | 1,200 | 2,500 | 2,900 |
| Total lead (TPb) load | ||||||||||
| 1999 | 10,000 | 2,600 | 23,000 | 910 | 64,000 | 3,200 | 250,000 | – | 20,000 | 11,000 |
| 2000 | 5,000 | 2,000 | 16,000 | 1,000 | 46,000 | 4,700 | 320,000 | – | 18,000 | 11,000 |
| 2001 | 1,900 | 390 | 2,500 | 64 | 5,100 | 440 | 37,000 | – | 4,300 | – |
| 2002 | 6,300 | 4,900 | 32,000 | 5,400 | 95,000 | 10,000 | 590,000 | – | 27,000 | 13,000 |
| 2003 | 1,400 | 540 | 6,000 | 1,000 | 17,000 | 2,100 | 170,000 | 6,500 | 7,600 | 4,200 |
| 2004 | – | – | 5,200 | – | 7,000 | 1,000 | 81,000 | 6,300 | – | – |
| Mean | 4,900 | 2,100 | 14,000 | 1,700 | 39,000 | 3,600 | 240,000 | 6,400 | 15,000 | 9,800 |
| Dissolved zinc (DZn) load | ||||||||||
| 1999 | 83,000 | 41,000 | 250,000 | 16,000 | 430,000 | 13,000 | 580,000 | – | 470,000 | 280,000 |
| 2000 | 91,000 | 37,000 | 200,000 | 14,000 | 380,000 | 11,000 | 500,000 | – | 420,000 | 250,000 |
| 2001 | 54,000 | 16,000 | 100,000 | 4,800 | 200,000 | 3,800 | 220,000 | – | 130,000 | – |
| 2002 | 78,000 | 34,000 | 170,000 | 15,000 | 330,000 | 14,000 | 440,000 | – | 410,000 | 220,000 |
| 2003 | 54,000 | 20,000 | 140,000 | 10,000 | 250,000 | 7,600 | 300,000 | 250,000 | 240,000 | 130,000 |
| 2004 | – | – | 142,000 | – | 240,000 | 8,000 | 290,000 | 230,000 | – | – |
| Mean | 72,000 | 30,000 | 167,000 | 12,000 | 310,000 | 9,600 | 310,000 | 240,000 | 330,000 | 220,000 |
| Total zinc (TZn) load | ||||||||||
| 1999 | 81,000 | 41,000 | 260,000 | 18,000 | 490,000 | 22,000 | 760,000 | – | 480,000 | 330,000 |
| 2000 | 78,000 | 38,000 | 210,000 | 16,000 | 430,000 | 20,000 | 660,000 | – | 440,000 | 350,000 |
| 2001 | 48,000 | 16,000 | 100,000 | 5,000 | 220,000 | 5,300 | 220,000 | – | 140,000 | – |
| 2002 | 79,000 | 38,000 | 190,000 | 18,000 | 410,000 | 28,000 | 690,000 | – | 460,000 | 300,000 |
| 2003 | 65,000 | 21,000 | 140,000 | 12,000 | 290,000 | 12,000 | 370,000 | 290,000 | 280,000 | 150,000 |
| 2004 | – | – | 140,000 | – | 260,000 | 12,000 | 330,000 | 240,000 | – | – |
| Mean | 70,000 | 31,000 | 170,000 | 14,000 | 350,000 | 17,000 | 510,000 | 265,000 | 360,000 | 280,000 |
| Total metals | ||||||||||
| 1999 | 92,000 | 44,000 | 280,000 | 19,000 | 560,000 | 25,000 | 1,000,000 | – | 500,000 | 340,000 |
| 2000 | 84,000 | 40,000 | 230,000 | 17,000 | 480,000 | 25,000 | 980,000 | – | 460,000 | 360,000 |
| 2001 | 50,000 | 17,000 | 100,000 | 5,100 | 230,000 | 5,800 | 260,000 | – | 100,000 | – |
| 2002 | 86,000 | 43,000 | 220,000 | 23,000 | 510,000 | 38,000 | 1,300,000 | – | 490,000 | 310,000 |
| 2003 | 67,000 | 22,000 | 150,000 | 13,000 | 310,000 | 14,000 | 540,000 | 300,000 | 290,000 | 160,000 |
| 2004 | – | – | 150,000 | – | 270,000 | 13,000 | 410,000 | 250,000 | – | – |
| Mean | 76,000 | 33,000 | 190,000 | 15,000 | 390,000 | 20,000 | 750,000 | 275,000 | 370,000 | 293,000 |
| Mean percentage of total metals (by weight) | ||||||||||
| Cadmium | 0.67 | 0.59 | 0.63 | 0.25 | 0.65 | 0.29 | 0.45 | 0.39 | 0.40 | 0.27 |
| Lead | 6.6 | 6.3 | 7.4 | 11 | 10 | 18 | 32 | 2.4 | 4.0 | 3.4 |
| Zinc | 93 | 93 | 92 | 89 | 89 | 82 | 68 | 97 | 96 | 96 |
U.S.
Department of the Interior | U.S. Geological
Survey
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