Dr. Alan Dutton has > 30 years of experience in hydrogeology with emphasis on numerical modeling of groundwater resources; basin- and watershed-scale flow; geochemical controls on freshwater-to-brine water quality; and the application of stable and radioactive isotopes in hydrogeology and paleohydrology. He developed and worked on computer models of groundwater resources in the Edwards, Carrizo-Wilcox, Ogallala, Trinity-Woodbine, and Gulf Coast aquifers and other aquifers in Texas. Dr. Dutton has been at The University of Texas at San Antonio since 2004 where he teaches undergraduate and graduate courses in geology, engineering geology, geochemistry, physical and environmental hydrogeology, and groundwater modeling.