Scientific Investigations Report 2007–5186
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5186
Table 4. Comparison of total nitrogen, total phosphorus, and suspended-sediment loads based on sampling results from co-located sites operated by U.S. Geological Survey and other agencies.
[Values represent the ratio of predicted non-USGS (U.S. Geological Survey) load to predicted USGS load (expressed as a percentage). Abbreviations: TN, total nitrogen; TP, total phosphorus; SS, suspended sediment; OR, Oregon; WA, Washington; –, insufficient data]
| Site name | Load (percentage USGS) |
||
|---|---|---|---|
| TN | TP | SS | |
| Water year 1997 | |||
| Willamette River at Portland, OR | 94.2 | 96.0 | 34.0 |
| Palouse River at Hooper, WA | 95.4 | 38.3 | 31.4 |
| Yakima River at Kiona, WA | 92.6 | 75.3 | 53.9 |
| Water year 2000 | |||
| Willamette River at Portland, OR | 94.6 | 101 | 48.0 |
| Palouse River at Hooper, WA | 98.5 | 76.1 | 70.1 |
| Yakima River at Kiona, WA | 92.4 | 91.9 | 80.2 |
| Water year 2001 | |||
| Willamette River at Portland, OR | 106 | 108 | 70.0 |
| Palouse River at Hooper, WA | 93.6 | 120 | 103 |
| Yakima River at Kiona, WA | 94.8 | 95.9 | 104 |
| Fanno Creek at Durham Road, OR | 101 | 93.8 | – |
U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/sir/2007/5186
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