Dorothy Sifuentes, PhD


Professional Experience

U.S.G.S., Supervisory Hydrologist, 2008-present, Davie, Florida

U.S.G.S., Hydrologist, 1999-2008, Atlanta, Georgia

Indiana University Department of Chemistry, Research Assistant and Post-Doctoral Fellow, 1993-1999

Mobil Research and Development Corporation, Summer Internships, 1992 and 1993


U.S.G.S., Hydrologist, 1988-1991, West Trenton, New Jersey


Ph.D., Geochemistry, Indiana University, Bloomington, Indiana, 1998

M.S., Geological Sciences, Indiana University Bloomington, Indiana, 1995      

A.B., Geology, Bryn Mawr College, Bryn Mawr, Pennsylvania, 1987


I have worked on a wide range of natural resource problems, including:

  • mineralogy and transport of naturally occurring radionuclides in groundwater, Newark Basin, New Jersey;
  • generation of natural gas, diagenetic process, and prediction of hydraulic properties of natural gas and petroleum reservoirs by mechanical and geochemical processes, Piceance Basin, Colorado, and Mid-Norway Basin, North Sea; and
  • saltwater intrusion and the effects of climate change on groundwater resources in coastal Georgia and South Carolina, and in southeastern coastal Florida.

I currently supervise scientists and provide technical oversight on a wide range of hydrologic studies of significant relevance to water resources in South Florida.




Selected Publications

Payne, D.F., 2010, Effects of Sea-Level Rise and Pumpage Elimination on Saltwater Intrusion in the Hilton Head Island Area, South Carolina, 2004-2104: U.S. Geological Survey Scientific Investigations Report, 2009-5251, 83 p.

 Payne, D.F., 2010, Effects of Climate Change on Saltwater Intrusion at Hilton Head Island, S.C. U.S.A.: in Proceedings of the 21st Salt Water Intrusion Meeting, June 21-26, S. Miguel, Portugal, p. 293-296.

 Payne, D.F., 2007, Effects of pumpage reductions in the Savannah, Georgia—Hilton Head Island, South Carolina, area on saltwater intrusion near Hilton Head Island: in Proceedings of the 2007 Georgia Water Resources Conference, March 27-29, 2007, Todd Rasmussen, Denise G. Carroll, and Aris Georgakakos, eds., the University of Georgia, Athens, GA, 8 p.

 Provost, A.M., Payne, D.F., and Voss, C.I., 2006, Simulation of saltwater movement in the Upper Floridan aquifer in the Savannah, Georgia–Hilton Head Island, South Carolina, area, predevelopment–2004, and projected movement for 2000 pumping conditions: U.S. Geological Survey Scientific Investigations Report, 2006-5058, 124 p.

 Payne, D.F., Abu Rumman, M., and Clarke, J.S., 2005, Simulation of ground-water flow in coastal Georgia and adjacent parts of South Carolina and Florida—Predevelopment, 1980, and 2000: U.S. Geological Survey Scientific Investigations Report, 2005-5089, 82 p.

 Payne, D.F., Provost, A.M., Painter, J.A., Abu Rumman, M., and Cherry, G., 2006, Application of ground-water flow and solute transport models to simulate selected water-management scenarios in coastal Georgia and adjacent parts of South Carolina and Florida, 2000–2100: U.S. Geological Survey Scientific Investigations Report, 2006-5077, 78 p.

Payne, D.F. and Ortoleva, P.J., 2001, A model for lignin alteration - part I: A kinetic reaction-network model: Organic Geochemistry, vol. 32, p. 1073-1085.

 Payne, D.F. and Ortoleva, P.J., 2001, A model for lignin alteration - part II: Numerical model of natural gas generation and application to the Piceance Basin, Western Colorado: Organic Geochemistry, vol. 32, p. 1087-1101.

 Payne, D.F., Tuncay, K., Park, A., Comer, J.B., and Ortoleva, P., 2000, A reaction-transport-mechanical approach to modeling the interrelationships among gas generation, overpressuring, and fracturing: Implications for the Upper Cretaceous natural gas reservoirs of the Piceance Basin, Colorado: AAPG Bulletin, vol. 84, p. 545-565.

 Szabo, Z., Taylor, T.A., Payne, D.F., and Ivahnenko, T., 1997, Relation of hydrogeologic characteristics to distribution of radioactivity in ground water, Newark Basin, New Jersey: U.S.G.S. Water-Resources Investigations Report 95-4136, 134 p.