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Email:
sryker at cmu dot edu
Phone:
+01-412-268-5607
+01-412-268-3757 fax
Mail:
Carnegie Mellon University,
Engineering & Public Policy,
Baker Hall 129,
Pittsburgh, PA 15213
USA
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Research interests
Environmental policy and regulation
- Priority-setting for research and regulation
- Future water policy
- Risk assessment for complex environmental exposures
- Integrating environmental and health data
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Natural resource science and methods
- Ground-water and drinking-water quality
- Water supply and population change
- Analysis of retrospective or "available" data
- Spatially referenced modeling and visualization of multivariate data
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Doctoral committee
- Chair: Mitchell J. Small, Carnegie Mellon University
- Dept. of Civil and Environmental Engineering; Dept. of Engineering and Public Policy
- Paul S. Fischbeck, Carnegie Mellon University
- Dept. of Social and Decision Sciences; Dept. of Engineering and Public Policy; Center for the Study and Improvement of Regulation
- David Gerard, Carnegie Mellon University
- Dept. of Engineering and Public Policy; Center for the Study and Improvement of Regulation
- Bernard D. Goldstein, University of Pittsburgh
- Dept. of Environmental and Occupational Health
- Richard C. Hertzberg, Emory University
- Dept. of Environmental and Occupational Health
Primary funding
Selected peer-reviewed publications
- Ryker, SJ and MJ Small (in press). "Combining occurrence and toxicity information to identify priorities for research on mixtures in drinking water." Risk Analysis.
- Ryker, SJ and MJ Small (in draft). "Using environmental exposure data to examine regional impacts of regulating mixtures in drinking water."
- Ryker, SJ and MJ Small (in draft). "Statistical and geographic distributions of arsenic, cadmium, manganese, and nitrate in U.S. water supplies; and distributions of estimated hazards for binary and ternary mixtures."
- Ryker, SJ and MJ Small (2004). "Occurrence and health implications of mixtures of chemicals in drinking water of the United States." Prize for best student paper in exposure assessment. In Society for Risk Analysis Annual Meeting, Palm Springs, CA.
- Ryker, SJ (2003). "Arsenic in ground water used for drinking water in the United States." In Arsenic in Ground Water: Geochemistry and Occurrence, AH Welch and KG Stollenwerk, eds. Norwell, Massachusetts, Kluwer Academic Publishers: 165-178.
- Helsel, DR and SJ Ryker (2002). "Defining surfaces for skewed and highly variable data." Environmetrics 13: 1-9.
- Ayotte, JD, JR Nuckols, SJ Ryker, et al. (2002). "Estimating ground water arsenic concentrations for exposure assessment in cancer epidemiology." In 5th International Conference on Arsenic Exposure and Health Effects, San Diego, CA.
- Ryker, SJ (2002). "Predicting arsenic in water from aquifers in eastern New England." In Arsenic in New England--A Multi-Disciplinary Scientific Conference, Manchester, New Hampshire.
- Ryker, SJ (2001). "Mapping arsenic in ground water: A real need, but a hard problem." Geotimes Newsmagazine of the Earth Sciences 46(11): 34-36.
- Published maps at: USGS - Arsenic in Ground Water of the U.S.
- Interactive national map at: USGS - National Atlas of the U.S.
- Ryker, SJ and LM Frans (1999). Summary of nitrate concentrations in ground water of Adams, Franklin, and Grant Counties, Washington, Fall 1998--A baseline for future trend analysis. U.S. Geological Survey Water-Resources Investigation 99-4288: 39.
- Williamson, AK, MD Munn, SJ Ryker, et al. (1998). Water-quality assessment of the Central Columbia Plateau, 1992-95. U.S. Geological Survey Circular 1144: 34.
- Ryker, SJ and AK Williamson (1996). Pesticides in public supply wells of Washington State. U.S. Geological Survey Fact Sheet 122-96: 2.
- Ryker, SJ and AK Williamson (1996). Pesticides in public supply wells of the Central Columbia Plateau. U.S. Geological Survey Fact Sheet 205-96: 4.
- Ryker, SJ and JL Jones (1995). Nitrate concentrations in ground water of the Central Columbia Plateau. U.S. Geological Survey Open-File Report 95-445: 4.
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