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Visiting Professor

Charlie Andrews

  • Brief Biography
  • Research
  • Teaching
  • Published Works

Dr. Andrews is nationally known for his creative solutions to difficult water resource problems. His areas of expertise include the assessment and remediation of contaminated sites; formulation of water-resource projects; assessment of surface-water and groundwater flow and quality conditions at hazardous waste sites; design of water remediation systems; and development of new and modification of off-the-shelf numerical simulation models for adaptation to specific field projects. He has provided technical guidance to significant water-rights litigation.


Dr. Andrews is a frequently requested member of groundwater advisory panels for the evaluation of state-of- the-art hydrology and for pioneering research and evaluation of contaminant transport in the subsurface. He is the author and co-author of numerous publications on modeling of groundwater flow and transport of chemical constituents, and the use of analytical models in identifying appropriate remediation alternatives for a site.


PhD, Geology, University of Wisconsin, Madison, 1978

MS, Geology, University of Wisconsin, Madison, 1976

MS, Water Resources, University of Wisconsin, Madison, 1974

BA, Geology, Carleton College, 1973 American University of Beirut, Beirut, Lebanon, 1971-1972

Employment History

S.S. Papadopulos & Associates, Inc. Principal, 1984 to present, President, 1994–2012

Woodward - Clyde Consultants Hydrogeologist and head of Groundwater Section, 1980-1984

Northern Cheyenne Indian Tribe, Scientist, 1978-1980

Wisconsin State Government Dept. of Justice and Department of Natural Resources, Consultant, 1977-1978

University of Wisconsin, Madison Dept. of Geology & Geophysics, Research Assistant, 1975-1978

Dept. of Water Resources, Researcher 1974-1975

Representative Publications


[1] Andrews, C., 2011. How Much Modeling is Enough? Presentation at MODFLOW and More 2011: Integrated Hydrologic Modeling. International Groundwater Modeling Center (IGWMC), Colorado School of Mines, Maxwell, P., Hill, and Zheng, eds.

[2] Andrews, C., 2011. Urban Recharge Myth: Case Study of Montgomery County, Maryland. Presentation at the 2011 Ground Water Summit and 2011 Ground Water Protection Council Spring Meeting. National Ground Water Association, Baltimore, MD.

[3] Root, R.A., D. Vlassopoulos, N.A. Rivera, M.T. Rafferty, C. Andrews, and P.A. O'Day, 2009. Speciation and Natural Attenuation of Arsenic and Iron in a Tidally Influenced Shallow Aquifer: Geochimica et Cosmochimica Acta, Science Direct.

[4] Johnson, T., C. Andrews, and M. Hennessey, 2009. Development of Chloride Profiles to Estimate Groundwater Discharge for Cap Design in Onondaga Lake. Presentation at the Fifth International Conference on Remediation of Contaminated Sediments, Jacksonville, FL, February 2-5, 2009.

[5] Barth, G., and C. Andrews, 2009. Practical Problems, Practical Solutions. Presentation at the National Groundwater Association's Annual Groundwater Summit, Tucson, AZ, April 1923, 2009.

[6] Spiliotopoulos, A., and C.B. Andrews, 2007. Analysis of Aquifer Test Data – MODFLOW and PEST. in Groundwater and Wells.(3rd ed.). Sterrett, R.J., ed. Johnson Screens, New Brighton, MN, 812 p.

[7] Andrews, Charles, 2008. One Hydrogeology A New Paradigm for Model Construction: Modeling with Google Earth. Presentation at MODFLOW and More 2008: Ground Water and Public Policy Conference, May 18-21, 2008, Golden, CO.

[8] Andrews, C.B., 2008. Review of "Effective Groundwater Model Calibration: With Analysis of Data, Sensitivities, Predictions, and Uncertainty": Ground Water, v. 46, no. 1, p. 5.

[9] Karanovic, M., C.J. Neville, and C.B. Andrews, 2007. BIOSCREEN-AT: BIOSCREEN with an Exact Analytical Solution: Ground Water, v. 45, no. 2, pp. 242-245.

[10] Andrews, C.B., and G. Swenson, 2006. Simulation of Brine Movement into Onondaga Lake. Presentation at MODFLOW and More 2006: Managing Ground-Water Systems. International Ground Water Modeling Center, Colorado School of Mines Golden, CO, May 22-24, 2006. Vol. 2, pp. 480-483.

[11] Neville, C.J., and C.B. Andrews, 2006. Containment Criterion for Contaminant Isolation by Cutoff Walls: Ground Water, v. 44, no. 5, September-October, pp. 682-686.

[12] Spiliotopoulos, A.A., and C.B. Andrews, 2006. Analysis of Aquifer Test Data – MODFLOW and PEST. Presentation at MODFLOW and More 2006: Managing Ground-Water Systems. International Ground Water Modeling Center, Colorado School of Mines, Golden, CO, May 2224, 2006. Vol. 2, pp. 569-573.

[13] Vlassopoulos, D., N. Rivera, P.A. O'Day, M.T. Rafferty, and C.B. Andrews, 2005. Arsenic Removal by Zerovalent Iron: A Field Study of Rates, Mechanisms, and Long-Term Performance. in Advances in Arsenic Research: Integration of Experimental and Observational Studies and Implications for Mitigation. O'Day, P., D. Vlassopoulos, X. Meng, and L. Benning, eds. ACS Symposium Series, v. 915. Washington, DC: American Chemical Society, pp. 344-360.

[14] Andrews, C., and C. Neville, 2003. Ground Water Flow in a Desert Basin: Challenges of Simulating Transport of Dissolved Chromium. Ground Water, v. 41, no. 2, pp. 219-226.

[15] Rafferty, M.T., C.B. Andrews, D. Vlassopoulos, D. Sorel, and K.M. Binard, 2003. Remediation of an Arsenic Contaminated Site. Presentation at the 226th American Chemical Society National Meeting, September 711, 2003, New York City, NY.

[16] Vlassopoulos, D., C.B. Andrews, M. Rafferty, P.A. O'Day, and N.A. Rivera Jr., 2003. In Situ Arsenic Removal by Zero Valent Iron: An Accelerated Pilot Test Simulating Long-Term Permeable Reactive Barrier Performance. Presentation at the 226th American Chemical Society National Meeting, September 7-11, 2003, New York City, NY.

[17] Sorel, D., C.J. Neville, M.T. Rafferty, K. Chiang, and C.B. Andrews, 2002. Hydraulic Containment Using Phytoremediation and a Barrier Wall to Prevent Arsenic Migration. In Proceedings of the Third International Conference on Remediation of Chlorinated and Recalcitrant Compounds, May 20-23, 2002, Monterey, California. Gavaskar, A.R., and A.S.C. Chen, editors. Battelle Press.

[18] Vlassopoulos, D., J. Pochatila, A. Lundquist, C.B. Andrews, M.T. Rafferty, K. Chiang, D. Sorel, and

[19] N.P. Nikolaidis, 2002. An Elemental Iron Reactor for Arsenic Removal from Groundwater. in Proceedings of the Third International Conference on Remediation of Chlorinated and Recalcitrant Compounds, May 20-23, 2002, Monterey, CA. Gavaskar, A., and A.S.C. Chen, eds. Battelle Press.

[20] Andrews, C., and C. Neville, 2001. Groundwater Flow in a Desert Basin: Complexity and Controversy. Proceedings of MODFLOW 2001 and Other Modeling Odysseys, September 1114, 2001, International Groundwater Modeling Center, Colorado School of Mines, Golden, CO, pp.770775.

[21] Andrews, C.B, 2000. The Great American Experiment: Pump-and-Treat for Groundwater Cleanup. Proceedings of the International Symposium on Groundwater Contamination, Japanese Association of Groundwater Hydrology, Tokyo, Japan. June 26, 2000.

[22] Andrews, C.B, 2000. The Meaning of Success in Assessing Groundwater Remediation. Presentation at the Western Pacific Geophysics Meeting, June 2730, 2000, Tokyo, Japan. in Eos, v. 81, no. 22, May 30, 2000.

[23] Andrews, C.B., and D. Vlassopoulos, 2000. Modeling the Migration of Arsenic in Groundwater: Understanding the Processes. Geological Society of America, Annual Meeting, October 2000, Reno, NV. in Geological Society of America Abstracts with Programs, A406-7.

[24] Vlassopoulos, D., and C.B. Andrews, 2000. The Intertwined Fate of Iron and Arsenic in Contaminated Groundwater Entering a Tidal Marsh, San Francisco Bay. Invited Speaker Presentation at the National Ground Water Association Theis 2000 Conference on Iron in Groundwater, September 1518, 2000, Jackson Hole, WY.

[25] Lolcama, J.L., and C.B. Andrews, 1999. Catastrophic Flooding of a Quarry in Karstified Dolomite (Abstract). Presentation at the NGWA National Convention and Exposition, December 3-6, 1999, Nashville, TN. in Ground Water Supply Issues in the Next Century, 1999 Abstract Book. Nashville, TN: National Groundwater Association.

[26] Vlassopoulos, D., C. Andrews, R. Hennet, and S. Macko, 1999. Natural Immobilization of Arsenic in the Shallow Groundwater of a Tidal Marsh, San Francisco Bay. Presentation at the American Geophysical Union 1999 Spring Meeting, May 31June 4, Boston, MA.

[27] Andrews, C.B, 1998. MTBE: A Long-Term Threat to Ground Water Quality: Ground Water, v. 36, no.5, pp. 705-706.

[28] Hennet, R., D.A. Carleton, S.A. Macko, and C.B. Andrews, 1997. Environmental Applications of Carbon, Nitrogen, and Sulfur Stable Isotope Data: Case Studies (abstract). Invited Speaker Presentation at the Geological Society of America Annual Meeting, Salt Lake City, UT, November 1997.

[29] Zhang, Y., C. Zheng, C.J. Neville, and C.B. Andrews, 1996. ModIME User's Guide: An Integrated Modeling Environment for MODFLOW, PATH3D, and MT3D. Version 1.1. Bethesda, MD: S.S. Papadopulos & Associates, Inc.

[30] Larson, S.P., C.B. Andrews, and C.J. Neville, 1995. Parameter Estimation in Groundwater Modeling: Research, Development, and Application (abstract). American Geophysical Union (AGU) Spring Meeting, Baltimore, May 30June 2, 1995, Hydrology Sessions. S145, Abstract H51C-02 0835h.

[31] Andrews C.B. (co-author), 1994. Chapter 3Performance of Conventional Pump-and-Treat Systems, and Chapter 5Characterizing Sites for Ground Water Cleanup. in Alternative Ground Water Cleanup. Washington, DC: National Academy Press.

[32] Hennet, R.J.-C., and C.B. Andrews, 1993. PCB Congeners as Tracers for Colloid Transport in the SubsurfaceA Conceptual Approach. in Manipulation of Groundwater Colloids for Environmental Restoration. Ann Arbor, MI: Lewis Publishers, pp. 241-246.

[33] Zheng, C., G.D. Bennett, and C.B. Andrews, 1992. Reply to the Preceding "Discussion by Robert D. McCaleb of 'Analysis of Ground-Water Remedial Alternatives at a Superfund Site' ": Ground Water, v. 30, no. 3, pp. 440-442.

[34] Zheng, C., G.D. Bennett, and C.B. Andrews, 1991. Analysis of Ground-Water Remedial Alternatives at a Superfund Site: Ground Water, v. 29, no. 6, pp. 838-848.

[35] Andrews C.B. (co-author), 1990. Chapter 5Experience with Contaminant Flow Models in the Regulatory System. in Ground Water Models: Scientific and Regulatory Applications. Washington, DC: National Academy Press.

[36] Andrews, C.B., D.L. Hathaway, and S.S. Papadopulos, 1990. Modeling the Migration and Fate of Polychlorinated Biphenyls in the Subsurface. in Proceedings of the PCB Forum, Second International Conference for the Remediation of PCB Contamination, April 23, 1990, Houston, TX, pp. 64-82.

[37] Hathaway, D., and C. Andrews, 1990. Fate and Transport Modeling of Organic Compounds from a Gasoline Spill. in Proceedings of Petroleum Hydrocarbons and Organic Chemicals in Ground Water; Prevention, Detection, and Restoration, National Water Well Association and American Petroleum Institute, Houston, TX, October 31November 2, 1990. Ground Water Management, v. 4, pp. 563–576.

[38] Stephenson, D.E., G.M. Duffield, D.R. Russ, C.B. Andrews, and E.C. Phillips, 1989. Practical Use of Models in Ground Water Assessment and Protection Programs at the Savannah River Site: Three Case Histories. Presentation at the Joint USA/USSR Conference on Hydrogeology, Moscow, USSR, June 30July 11, 1989.

[39] Andrews, C.B., and S.P. Larson, 1988. Evolution of Water Quality in the Lower Rio Grande Valley, New Mexico. Eos, v. 69, no. 16, p. 357.

[40] Larson, S.P., C.B. Andrews, M.D. Howland, and D.T. Feinstein, 1987. Three-Dimensional Modeling Analysis of Groundwater Pumping Schemes for Containment of Shallow Groundwater Contamination. Presentation at Solving Ground Water Problems with Models, Association of Ground Water Scientists and Engineers, Denver, CO, February 1012, 1987. in Solving Ground Water Problems with Models: An Intensive Three-Day Conference and Exposition Devoted Exclusively to Ground Water Modeling. Vol. 1. Dublin, OH: National Water Well Association, pp. 517536. February 11.

[41] Looney, B.B., R.A. Field, G.B. Merrell, G. Duffield, and C.B. Andrews, 1987. Analyses of the Validity of Analytical Models Used for Assessment of Forty-Five Waste Site Areas: Subsurface Flow and Chemical Transport. in Solving Ground Water Problems with Models. Dublin, OH: National Water Well Association, pp. 954-982.

[42] Stephenson, D.E., B.B. Looney, C.B. Andrews, and D.R. Buss, 1987. Three-Dimensional Simulation of Groundwater Flow and Transport of Chemical and Low-Level Radioactive Constituents within Two Production Areas of the Savannah River Plant. in Proceedings of the 9th Annual Low-Level Radioactive Waste Conference, U.S. Department of Energy, Washington, DC, pp. 472-481.

[43] Auerbach, S.I., C. Andrews, D. Eyman, D.D. Huff, P.A. Palmer, and W.R. Uhte, 1984. Report of the Panel on Land Disposal. in Disposal of Industrial and Domestic Wastes: Land and Sea Alternatives. Washington, DC: National Academy Press, pp. 73100.

[44] Andrews, C.B., 1983. Hydrogeology in North America 1932 to 1982. in The Revolution in Earth Sciences: Advances in the Past Half-Century. Boardman, S., ed. Kendall/Hunt Publishing Company.

[45] Andrews, C.B., 1979. Impacts of Coal-Fired Power Plants on Local Ground-Water Systems. Wisconsin Power Plant Impact Study. U.S. Environmental Protection Agency. EPA 600/3-80-079. p. 203.

[46] Andrews, C.B., 1979. Statement of Dr. Charles Andrews, Hydrologist, Northern Cheyenne Tribe. Hearings before the Select Committee on Indian Affairs. U.S. Senate, 96th Congress, pp. 412-432.

[47] Andrews, C.B., and M.P. Anderson, 1979. Thermal Alteration of Groundwater Caused by Seepage from a Cooling Lake: Water Resources Research, v. 15, no. 3, pp. 595-602.

[48] Andrews, C.B., W. Woessner, and T. Osborne, 1979. The Impacts of Coal Strip Mining on the Hydrogeologic System of the Northern Great Plains Case Study of Potential Impacts on the Northern Cheyenne Reservation. Journal of Hydrology, v. 43, pp. 445-467.

[49] Andrews, C.B., 1978. The Impact of the Use of Heat Pumps on Groundwater Temperatures. Ground Water, v. 16, no. 6, pp. 437-443.

[50] Andrews, C.B., and M.P. Anderson, 1978. The Impact of a Power Plant on the Groundwater System of a Wetland. Ground Water, v. 16, no. 2, pp. 105-111.

[51] Andrews, C.B., and E. Quigley, 1975. Designing and Maintaining Ponds for Swimming. University of WisconsinMadison, Extension Publication G2678, p. 22.