National Water-Quality Assessment (NAWQA) Program
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MRB Trends Projects
MRB 1 -- Temporal Changes in Surface-Water Insecticide Concentrations after the Phaseout of Diazinon and Chlorpyrifos (Phillips and others, 2006)MRB1-3 -- Mercury Trends in Fish Tissue from Lakes and Streams in the United States, 1969-2005 (Chalmers and others)
MRB 4 -- Nutrient and Suspended-Sediment Trends in the Missouri River Basin (Sprague and others)
MRB5 -- Trends in Nutrient and Sediment Concentrations and Loads in Major River Basins of the South-Central United States, 1993-2004 (Rebich and Demcheck, 2007)
MRB 7 -- Nutrient and Suspended-Sediment Transport and Trends in the Columbia River and Puget Sound Basins, 1993-2003 (Wise and others)
SPARROW PROJECTS
MRB 7 -- Application of the SPARROW model to assess surface-water nutrient conditions and sources in the United States Pacific Northwest (Wise and Johnson)
MRB 7 -- Surface Water Nutrient Conditions and Sources in the United States Pacific Northwest (Wise and Johnson, 2011)
Contact Charlie Crawford, Surface Water Status and Trends Coordinator
URL: http:// water.usgs.gov /nawqa-only/rb/data_archive/index.html