Scientific Investigations Report 2006-5188
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006-5188
Table 8. Comparison of short- and long-term trace-metal load estimates for four streamflow-gaging stations in the Spokane River basin, Idaho.
[All values are in kilograms. Short-term records are for 1999-2004. Long-term records are for the periods: Enaville (1992-2004), Pinehurst, Harrison (1991-2004), and Post Falls (1991-2003). Symbols: –, no estimate]
| Water year | Trace-metal loads | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pinehurst | Enaville | Harrison | Post Falls | ||||||||
| Short-term | Long-term | Short-term | Long-term | Short-term | Long-term | Short-term | Long-term | ||||
| Annual dissolved cadmium (DCd) load | |||||||||||
| 1999 | 3,000 | 3,000 | 58 | 100 | 3,400 | 3,400 | 1,400 | 2,000 | |||
| 2000 | 2,600 | 2,700 | 52 | 71 | 2,800 | 2,900 | 1,300 | 1,600 | |||
| 2001 | 1,300 | 1,300 | 19 | 23 | 1,100 | 1,200 | 460 | 510 | |||
| 2002 | 2,300 | 2,300 | 64 | 64 | 2,600 | 2,600 | 1,400 | 1,300 | |||
| 2003 | 1,700 | 1,700 | 36 | 31 | 1,600 | 1,600 | 890 | 660 | |||
| 2004 | 1,600 | 1,600 | 37 | 32 | 1,600 | 1,600 | – | – | |||
| Annual total cadmium (TCd) load | |||||||||||
| 1999 | 3,400 | 3,600 | 73 | 110 | 5,100 | 5,000 | 2,100 | 2,300 | |||
| 2000 | 3,000 | 3,100 | 71 | 86 | 4,400 | 4,300 | 1,900 | 1,900 | |||
| 2001 | 1,400 | 1,400 | 19 | 20 | 1,400 | 1,400 | 590 | 660 | |||
| 2002 | 3,200 | 3,000 | 108 | 94 | 4,700 | 4,300 | 1,900 | 1,600 | |||
| 2003 | 2,200 | 2,000 | 43 | 37 | 2,400 | 2,400 | 1,000 | 940 | |||
| 2004 | 2,200 | 1,900 | 37 | 33 | 2,100 | 2,200 | – | – | |||
| Annual dissolved lead (DPb) load | |||||||||||
| 1999 | 2,700 | 3,200 | 150 | 250 | 23,000 | 23,000 | 1,700 | 1,700 | |||
| 2000 | 2,100 | 2,600 | 150 | 200 | 20,000 | 20,000 | 2,200 | 1,700 | |||
| 2001 | 1,000 | 1,200 | 60 | 65 | 6,400 | 6,300 | 710 | 870 | |||
| 2002 | 2,000 | 2,900 | 260 | 300 | 27,000 | 26,000 | 5,200 | 2,800 | |||
| 2003 | 1,200 | 1,700 | 150 | 140 | 13,000 | 12,000 | 2,500 | 2,300 | |||
| 2004 | 1,100 | 1,700 | 180 | 170 | 13,000 | 12,000 | – | – | |||
| Annual total lead (TPb) load | |||||||||||
| 1999 | 64,000 | 66,000 | 3,200 | 3,700 | 250,000 | 240,000 | 20,000 | 12,000 | |||
| 2000 | 46,000 | 48,000 | 4,700 | 4,300 | 320,000 | 260,000 | 18,000 | 11,000 | |||
| 2001 | 5,100 | 5,700 | 440 | 400 | 37,000 | 36,000 | 4,300 | 4,600 | |||
| 2002 | 95,000 | 95,000 | 10,000 | 6,300 | 590,000 | 410,000 | 27,000 | 14,000 | |||
| 2003 | 17,000 | 16,000 | 2,100 | 1,200 | 170,000 | 110,000 | 7,600 | 8,300 | |||
| 2004 | 7,000 | 6,600 | 1,000 | 500 | 81,000 | 66,000 | – | – | |||
| Annual dissolved zinc (DZn) load | |||||||||||
| 1999 | 430,000 | 460,000 | 13,000 | 12,000 | 580,000 | 600,000 | 470,000 | 450,000 | |||
| 2000 | 380,000 | 400,000 | 11,000 | 10,000 | 50,000 | 510,000 | 420,000 | 400,000 | |||
| 2001 | 200,000 | 210,000 | 3,800 | 3,500 | 220,000 | 210,000 | 130,000 | 140,000 | |||
| 2002 | 330,000 | 340,000 | 14,000 | 13,000 | 440,000 | 440,000 | 410,000 | 390,000 | |||
| 2003 | 250,000 | 250,000 | 7,600 | 6,800 | 300,000 | 290,000 | 240,000 | 250,000 | |||
| 2004 | 240,000 | 220,000 | 8,000 | 7,900 | 290,000 | 280,000 | – | – | |||
| Annual total zinc (TZn) load | |||||||||||
| 1999 | 490,000 | 500,000 | 22,000 | 24,000 | 760,000 | 740,000 | 480,000 | 470,000 | |||
| 2000 | 430,000 | 430,000 | 20,000 | 20,000 | 660,000 | 660,000 | 440,000 | 430,000 | |||
| 2001 | 220,000 | 220,000 | 5,300 | 4,800 | 220,000 | 240,000 | 140,000 | 160,000 | |||
| 2002 | 410,000 | 410,000 | 28,000 | 22,000 | 690,000 | 700,000 | 460,000 | 420,000 | |||
| 2003 | 290,000 | 290,000 | 12,000 | 8,500 | 370,000 | 410,000 | 280,000 | 280,000 | |||
| 2004 | 260,000 | 270,000 | 12,000 | 7,000 | 330,000 | 410,000 | – | – | |||
U.S.
Department of the Interior | U.S. Geological
Survey
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