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Scientific Investigations Report 2007–5186

Scientific Investigations Report 2007–5186

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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

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