Scientific Investigations Report 2006–5106

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5106

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Table 3. Summary of dissolved inorganic nitrogen concentrations and their relation to streamflow for nine rivers draining into Hood Canal, western Washington.

[Regression: DIN, dissolved inorganic nitrogen; B, m, emperical regression parameters; Qmonth, monthly mean streamflow; Qmean, mean streamflow 1971–2002. Abbreviations: mg/L, milligram per liter]

River Years sampled Number of samples Dissolved inorganic nitrogen concentrations (mg/L)   Relation to streamflow
(DINmonth= m•(Qmonth/Qmean)B)
Summary statistics
Minimum Median Maximum m B
Skokomish River
Skokomish 1960-67, 1969-74, 1978-80, 1984-2002 311 0.00 0.09 0.72 0.11 0.161
Other Olympic Rivers
Duckabush 1960-67, 1969-74, 1993-2002 153 0.01 0.04 0.21 0.05 0.107
Dosewallips 1959-70, 19-1974, 1994 64 .01 .10 .41 .08 .619
Hamma Hamma 1962-67, 1969-70, 1972-74, 1994 41 .01 .11 .41 .10 .231
Big Quilcene 1959-66, 1972-74, 1994, 1999-2001 94 .01 .08 .29 .10 .163
South Olympic, South-Shore, and Kitsap Lowlands
Union 1998 12 0.20 0.37 0.70 0.38 0.251
Dewatto 1972-74, 1998 30 .02 .12 .29 .31 .159
Finch 1994, 1999 24 .05 .11 .56 .14 .200
Tahuya 1998 12 .06 .12 .18 .14 .159
Total 741
Median 0.11 0.163

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