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AcknowledgmentsThe research described in this report was partially funded by the U.S. Environmental Protection Agency's 319 grant program that is administered by the North Carolina Department of Environment and Natural Resources, Division of Water Quality. The authors thank Evan Kane, Michael Tutwiler, and Keith Larick of the North Carolina Department of Environment and Natural Resources, Division of Water Quality, Aquifer Protection Section, in Raleigh for their help and support in this project.Thanks also to Brian Pointer, U.S. Geological Survey, for his assistance in compiling data during the study. Gratitude is extended to Douglas Harned and Timothy Spruill (retired), U.S. Geological Survey, for providing valuable technical discussions throughout the study. Finally, many thanks to all of the reviewers of this report who made many helpful comments and suggestions.
Relation of Watershed Setting and Stream Nutrient Yields at Selected Sites in Central and Eastern North Carolina, 1997-2008By Stephen L. Harden, Thomas F. Cuffney, Silvia Terziotti, and Katharine R. Kolb
AbstractData collected between 1997 and 2008 at 48 stream sites were used to characterize relations between watershed settings and stream nutrient yields throughout central and eastern North Carolina. The focus of the investigation was to identify environmental variables in watersheds that influence nutrient export for supporting the development and prioritization of management strategies for restoring nutrient-impaired streams.Nutrient concentration data and streamflow data compiled for the 1997 to 2008 study period were used to compute stream yields of nitrate, total nitrogen (N), and total phosphorus (P) for each study site. Compiled environmental data (including variables for land cover, hydrologic soil groups, base-flow index, streamflows, wastewater treatment facilities, and confined animal feeding operations) were used to characterize the watershed settings for the study sites. Data for the environmental variables were anal...