Dr Rebecca Murphy
Dr Rebecca MurphySave to Address Book (VCard)
Dr Rebecca Murphy
Water Quality Analyst
Chesapeake Bay Program Office
410 Severn Avenue
Annapolis, MD 21403
Phone: (410) 267-9837
PhD from Johns Hopkins University in Geography and Environmental Engineering
ME from Cornell University in Biological and Environmental Engineering
BS from Cornell University in Agricultural and Biological Engineering
Assistant Research Scientist. UMCES Chesapeake Bay Program. Annapolis, Maryland
Engineer III. EA Engineering, Science, and Technology. Hunt Valley, Maryland
Research Assistant. Johns Hopkins University, Department of Geography and
Environmental Engineering. Baltimore, Maryland
Senior Associate. ICF International. Research Triangle Park, North Carolina
Engineering-in-training. Blue: Land, Water, Infrastructure. Clayton, North Carolina
My work and research experiences have all involved identifying, linking, and using the right mix of analysis tools, models, and data to examine environmental problems. At the Chesapeake Bay Program, I am computing and evaluating long-term trends in water quality throughout the estuary. This involves using Generalized Additive Models and other statistical techniques to explore spatial and temporal dynamics of various parameters in the estuary. My doctoral research was closely related and involved conducting long-term data analyses of hypoxia, stratification, nutrients, climate, and other relevant environmental variables in Chesapeake Bay. I also developed and implemented novel spatial statistics tools for interpolation of water quality data in the Bay. While working in consulting, I designed and built multiple 3-dimentional kriging-based models of sediment contamination for remediation plans at sites around the U.S. and ran multiple dynamic models for both thermal plume and air dispersion evaluations. My expertise is in statistical spatial interpolation (kriging) and long-term data analysis, and I consistently find myself bridging the gaps between engineering, computer science, and environmental science disciplines with my work.
- Data analyses using geostatistics, GIS, regression, parametric and non-parametric statistics
- Database development and querying: Visual Basic, SQL, MS Access
- Scientific programming: R, Matlab, SAS
- Applying modeling software: Hydrodynamic (DHI’s MIKE3); Air Quality (AERMOD, ISC-ST3, SCREEN3, and MOBILE); Multimedia Fate and Transport (TRIM.FaTE)
Murphy, R., E. Perlman, W. Ball, W., and F. Curriero. 2014. Water-Distance-Based Kriging in Chesapeake Bay. J. Hydrol. Eng. , 10.1061/(ASCE)HE.1943-5584.0001135.
Urquhart, E.A., M.J. Hoffman, R.R. Murphy, and B.F. Zaitchik. 2013. Geospatial interpolation of MODIS-derived salinity and temperature in the Chesapeake Bay. Remote Sensing of Environment 135:167-177.
Murphy, R.R., W.M. Kemp, and W.P. Ball. 2011. Long-Term Trends in Chesapeake Bay Seasonal Hypoxia, Stratification, and Nutrient Loading. Estuaries & Coasts 34:1293-1309.
Murphy, R.R., F.C. Curriero, and W.P. Ball. 2010. Comparison of Spatial Interpolation Methods for Water Quality Evaluation in the Chesapeake Bay. ASCE Journal of Environmental Engineering 136(2):160-171.
Perlman E., R. Burns, M. Kazhdan, R.R. Murphy, W.P. Ball, and N. Amenta. 2010. Organization of Data in Non-Convex Spatial Domains. Scientific and Statistical Database Management, Lecture Notes in Computer Science 6187: 342-359.
CBEO Project Team (W. Ball, D. Brady, M. Brooks, R. Burns, B. Cuker, D. DiToro, T. Gross, W.M. Kemp, L. Murray, R. Murphy, E. Perlman; M. Piasecki, J. Testa, I. Zaslavsky). 2008. A Prototype System for Multi-Disciplinary Shared Cyberinfrastructure –Chesapeake Bay Environmental Observatory (CBEO). ASCE J. Hydrologic Engineering 13(10):960-970.
Murphy, R. and D.A. Haith. 2007. Inhalation Health Risks to Golfers from Turfgrass Pesticides at Three Northeastern U.S. Sites. Environmental Science and Technology 41:1038-1043.
Published as Rebecca R. Walden prior to 2004:
Walden, R.R and D.A. Haith. 2003. Estimating Turf Pesticide Volatilization from Simple Evapotranspiration Models. Journal of Environmental Quality 32:1138-1143.
Maier, E.A., R.D. Matthews, J.A. McDowell, R.R. Walden, and B.A. Ahner. 2003. Environmental Cadmium Levels Increase Phytochelatin and Glutathione in Lettuce Grown in a Chelator-Buffered Nutrient Solution. Journal of Environmental Quality 32:1356-1364.
Haith, D.A, P. Lee, J.M. Clark, G.R. Roy, M. Imboden, and R.R. Walden. 2002. Modeling Pesticide Volatilization from Turf. Journal of Environmental Quality 31:724-729.
Murphy, R.R. 2012. Development and Use of Spatial Interpolation Methods to Analyze Trends in Chesapeake Bay Seasonal Hypoxia and Stratification. Johns Hopkins University, Baltimore, MD.