My dissertation research examined limnological and geochemical processes in mine pit lakes associated with precious-metal mining in Nevada. I also have extensive experience in ground-water sampling, ground-water monitoring network design and evaluation, and modeling water-rock reactions using aqueous thermodynamic geochemical models including PHREEQC, NETPATH, EQ3/6, and Geochemist’s Workbench. Other research interests include the use of environmental isotopes and aqueous geochemistry in hydrogeologic studies to delineate ground-water flow at the local and regional scales. I have used inorganic and organic carbon isotopes to trace the movement of water through the hydrologic cycle and to delineate recharge zones in mountainous carbonate terrain. I am also interested in the ground-water transport of radionuclides and hazardous materials.