Greg Olyphant is an Associate Professor of Geological Sciences at Indiana University and Principal Researcher of the Center for Geospatial Data Analysis. Greg collaborates with other researchers in the CGDA as well as advising and directing the research of a large number of graduate students and undergraduate interns. He was a founding member Interagency Task Force on E. coli and currently participates on the Steering Committee of the Indiana University Research and Teaching Preserve.

Hydrology and Numerical/Statistical Modeling: especially hydrologic monitoring of the vadose zone to quantify contaminant loading of shallow aquifers; computer modeling of groundwater flow in non-uniform and highly heterogeneous terrain; routing of water, sediment, and solutes in branching drainage networks; predictive modeling for making decisions about beach closures along shorelines that are susceptible to high bacterial (E. coli) concentrations.

• A hydropedological approach to quantifying groundwater recharge in various glacial settings of the mid-continental USA
• Geochemical characterization of coal-combustion byproducts and numerical simulations of their long-term effects as capping materials at coal mine reclamation sites
• Geochemical characterization of coal-combustion byproducts and numerical simulations of their long-term effects as capping materials at coal mine reclamation sites
• Mineral formation and the fate of iron, aluminum and sulfur within field-scale sulfate-reducing bioreactors
• Reservoir simulation and aquifer reactive transport modeling as key approaches for improving the utilization of coal resources