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Changes in Nutrient and Sediment Concentrations in Streams and Rivers of the United States, 1993-2003

For information on changes in nutrient concentrations and loads in streams and rivers and how these changes correspond to streamflow and nutrient sources, see the USGS report: Nutrient Trends in Streams and Rivers of the United States, 1993-2003

For information on how trends in total nitrogen and total phosphorus concentrations vary by major geographic regions of the U.S., see the article and supplemental material in Environmental Science and Technology: Regional Nutrient Trends in Streams and Rivers of the United States, 1993-2003

Technical Announcement

Maps - Changes in nutrient concentrations, sources, and streamflow, 1993-2003

• Changes in total phosphorus concentrations
• Changes in total phosphorus concentrations, adjusted for streamflow
• Changes in total nitrogen concentrations
• Changes in total nitrogen concentrations, adjusted for streamflow
• Changes in streamflow
• Changes in phosphorus and nitrogen inputs from manure
• Changes in phosphorus and nitrogen inputs from fertilizer
• Changes in population density and nitrogen loading from atmospheric deposition

For more information on how nutrients varied from 1993 to 2003 in 244 streams across the Nation, contact: Lori Sprague (lsprague@usgs.gov).

Assessments of Nutrient and Sediment Trends in Selected Major River Basins

Regional-scale USGS assessments examined changes from 1993 to 2003 in nutrient and sediment concentrations and loads in relation to changes in streamflow and nutrient sources throughout selected major river basins.

• Great Lakes, Ohio, Upper Mississippi, and Souris-Red-Rainy River Basin
        (contact: Dave Lorenz, lorenz@usgs.gov)

• Missouri River Basin
       (contact: Lori Sprague, lsprague@usgs.gov)

• Lower Mississippi, Arkansas-White-Red, and Texas-Gulf River Basin
       (contact: Richard Rebich, rarebich@usgs.gov)

• Columbia River and Puget Sound Basins
       (contact: Daniel Wise, dawise@usgs.gov)

Related Links:

• Nutrients in rivers, streams, and aquifers in the United States
• Regional and national monitoring and assessments of streams and rivers
• Effects of nutrient enrichment on stream ecosystems
• National Stream Quality Accounting Network

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Page Last Modified: Friday, 31-Jul-2009 08:12:31 EDT