Groundwater contaminant transport; groundwater basin characterization and management; geologic/geostatistical characterization of subsurface heterogeneity for improved pollutant transport modeling; numerical modeling of groundwater flow and contaminant transport; role of molecular diffusion in contaminant transport and remediation; long-term sustainability of regional groundwater quality; vulnerability of aquifers to non-point-source groundwater contaminants. Skills and Expertise Water Quality Hydrological Modeling Hydrology Environment Environmental Impact Assessment Water Resources Management Agriculture Water Chemistry