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. 2010 Oct;46(5):857–880. doi: 10.1111/j.1752-1688.2010.00482.x

TABLE 2.

Trend Slopes for Flow-Normalized Annual Average Values for Various Time Periods, Dissolved Nitrate Plus Nitrite, Choptank River Near Greensboro, Maryland.

Concentration Results
Flux Results
Time Span Slope (mg/l per year) Slope (% per year) Slope (kg/day per year) Slope (% per year)
1980-1990 +0.013 +1.4 +6.4 +2.2
1990-2000 +0.012 +1.1 +2.5 +0.7
2000-2008 +0.021 +1.8 +5.9 +1.6