Scientific Investigations Report 2007–5186
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5186
Table 15. Summary of total point-source annual nutrient loads as a percentage of predicted instream annual loads, Columbia River and Puget Sound basins, water year 2000.
[Abbreviations: TN, total nitrogen; TP, toal phosphorus; <, less than; >, greater than]
| Constituent | Number of sites with total annual point-source catchment nutrient loads (percent) |
|||
|---|---|---|---|---|
| < 25 | 25 – 50 | 50 – 75 | > 75 | |
| TN | 24 | 6 | 0 | 1 |
| TP | 13 | 15 | 2 | 1 |
U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/sir/2007/5186
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