Scientific Investigations Report 2007–5186
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5186
Table 14. Quartile ranges for total nitrogen, total phosphorus, and suspended sediment annual yields for the Columbia River and Puget Sound basins, water year 2000.
[All TN and TP loads are in pounds per year per square mile; suspended-sediment loads are in tons per year per square mile. Abbreviations: TN, total nitrogen, TP, total pohosphorus, SS, suspended sediment]
| Yields | Quartile range | |||
|---|---|---|---|---|
| 1st | 2nd | 3rd | 4th | |
| TN | 177–651 | 663–1,710 | 1,780–4,050 | 4,050–32,300 |
| TP | 16.8–78.6 | 83.6–180 | 190–387 | 390–1,460 |
| SS | 1.57–6.68 | 8.89–35.0 | 35.0–90.7 | 97.6–1,490 |
U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/sir/2007/5186
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