Long-Term Trend in Flow-Adjusted Total Nitrogen Concentration, 1985-2012

Long-Term Trend in Flow-Adjusted Total Nitrogen Concentration, 1985-2012

Author: USGS

Date created: Jan 02, 2014

Long Term Trend: Seventy percent of long-term stream monitoring sites in the Chesapeake Bay Watershed have improving flow-adjusted concentrations of nitrogen. Between 1985 and 2012: - 21 out of 30 sites show improving flow-adjusted trends for nitrogen concentrations, - 3 sites show degrading trends, and - 6 sites show small changes that are not statistically significant.

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