Koterba, M. T., F. D. Wilde, and W. W. Lapham. 1995. Ground-Water Data-Collection Protocols and Procedures for the National Water-Quality Assessment Program: Collection and Documentation of Water-Quality Samples and Related Data. U.S. Geological Survey Open-File Report 95-399. Reston, Va.: U.S. Geological Survey.

Litke, D. W. 1999. Review of Phosphorus Control Measures in the United States and Their Effects on Water Quality. U.S. Geological Survey Water-Resources Investigations Report 99-400. Denver, Colo.: U.S. Geological Survey.

Lynn, W. R. 1985. Letter to D. Peck, Director, USGS. Reston, Va.

Mallard, G. E., J. T. Armbruster, R. E. Broshears, E. J. Evenson, S. N. Luoma, P. J. Phillips, and K. R. Prince. 1999. Recommendations for Cycle II of the National Water Quality Assessment (NAWQA) Program. U.S. Geological Survey NAWQA Planning Team. U.S. Geological Survey Open File Report 99-470. Reston, Va.: U.S. Geological Survey.

McMahon, P. B., and J. K. Bohlke. 1996. Denitrification and mixing in a stream-aquifer system: Effects on nitrate loading to surface water. Journal of Hydrology 186:105-128.

Miller, T. L., and W. G. Wilber. 1999. Emerging drinking water contaminants: Overview and role of the National Water Quality Assessment Program. Pp. 33-42 in Identifying Future Drinking Water Contaminants. Washington, D.C.: National Academy Press.

NRC (National Research Council). 1986. National Water Quality Monitoring and Assessment. Report on a Colloquium Sponsored by the Water Science and Technology Board, May 21-22, 1986. Washington, D.C.: National Academy Press.

NRC. 1990. A Review of the USGS National Water Quality Assessment Pilot Program. Washington, D.C.: National Academy Press.

NRC. 1994. National Water Quality Assessment Program: The Challenge of National Synthesis. Washington, D.C.: National Academy Press.

NRC. 2001. Future Roles and Opportunities for the U.S. Geological Survey. Washington, D.C.: National Academy Press.

Smith, R. A., and R. B. Alexander. 2000. Sources of nutrients in the nation’s watersheds. In Managing Nutrients and Pathogens from Animal Agriculture. Proceedings from the Natural Resource, Agriculture, and Engineering Service Conference for Nutrient Management Consultants, Extension Educators, and Producer Advisor. Camp Hill, Pa. March 28-30. Available online at http://water.usgs.gov/nawqa/sparrow/nut_sources/nut_sources.htm.

Smith, R. A., G. E. Schwarz, and R. B. Alexander. 1997. Regional interpretation of water quality monitoring data. Water Resources Research 33(12):2781-2798.

Squillace, P. J., J. S. Zogorski, W. G. Wilber, and C. V. Price. 1996. Preliminary assessment of the occurrence and possible sources of MTBE in groundwater in the United States, 1993-1994. Environmental Science and Technology 30(5):1721-1730.

Triska, F. J., V. C. Kennedy, R. J. Avanzino, G. Zellweger, and K. E. Bencala. 1989. Retention and transport of nutrients in a third-order stream in northwestern California: Hyporheic processes. Ecology 70:1893-1905.

USGS (U.S. Geological Survey). 1997. Pesticides in Surface Waters: Current Understanding of Distribution and Major Influences. U.S. Geological Survey Fact Sheet FS-039-97. Sacramento, Calif.: U.S. Geological Survey.

USGS. 1999. The Quality of Our Nation’s Waters: Nutrients and Pesticides. U.S. Geological Survey Circular 1225. Reston, Va.: U.S. Geological Survey.

Vervier, P., J. Gibert, P. Marmonier, and M. J. Dole-Olivier. 1992. A perspective on the permeability of the surface freshwater-groundwater ecotone. Journal of the North American Benthological Society 11:93-102.

Zogorski, J. S., A. Morduchowitz, A. L. Baehr, B. J. Bauman, D. L. Conrad, R. T. Drew, N. E. Korte, W. W. Lapham, J. F. Pankow, and E. R. Washington. 1997. Fuel oxygenates and water quality. Chapter 2 in Interagency Assessment of Oxygenated Fuels. Washington, D.C.: Office of Science and Technology Policy, Executive Office of the President.

The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement