Greg A. Olyphant

Greg A. Olyphant

Associate Professor Emeritus, Earth and Atmospheric Sciences


  • Ph.D., University of Iowa, 1979
  • B.A., California State University at Fullerton, 1974

Research Interests

Predicting the need for beach closures due to the presence of harmful bacteria in swimming water. Beach Closings Model Web Page.

Variably saturated groundwater flow in glacial aquifer systems.

Nitrate loading of water table aquifers in the vicinity of farm fields and on-site septic system distribution systems.

Graduate student projects

  • Modeling the hydroperiods of groundwater dominated wetlands
  • Quantifying environmental influences on plant biodiversity and species distributions in abandoned agricultural fields


  • Founding member Interagency Task Force on E. coli
  • Steering Committee Indiana University Research and Teaching Preserve