Indiana University Bloomington

Greg A. Olyphant

Greg A. Olyphant

Associate Professor of Geological Sciences


Office:   GY429
Phone:   812-855-1351

Educational Background

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

Research Interests

Hydrology, Geomorphology, Environmental Geology

Courses Taught

  • G415, Principles of Geomorphology
  • G550, Surface Water Hydrology

Recent Research Projects

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.

Undergraduate Projects and Opportunities

Internships in the Center for Geospatial Data Analysis (CGDA)

Representative Publications

Harper, D., Olyphant, G. A., and Branam, T. D., 2013, Direct revegetation and the sustainability of reclaimed mine lands—the story of the Friar Tuck Site, Indiana, in Comer, J. B., ed., Effects of abandoned mine land reclamation on ground and surface water quality—research and case histories from Indiana: Indiana Geological Survey Special Report 72: 83-125.

Waddle, R. C., and Olyphant, G. A., 2012. Hydrogeologic modeling of flow within sulfate-reducing bioreactors: Implications for system design and performance, in Barnhisel, R.I., ed., Proceedings of the 2012 National Meeting of the American Society of Mining and Reclamation, Sustainable Reclamation, June 8–15, 2012, Tupelo, MS, p. 500-519.

Boswell, J.S. and Olyphant, G.A., 2007. Modeling the hydrologic response of groundwater dominated wetlands to transient boundary conditions: Implications for wetland restoration. Journal of Hydrology 332: 467-476.

Olyphant, G.A., 2005. Statistical basis for predicting the need for bacterially induced beach closures: Emergence of a paradigm? Water Research 39(20):4953-4960.

Olyphant, G.A. and Whitman, R.L., 2004. Elements of a predictive model for determining beach closures on a real time basis: The case of 63rd Street Beach Chicago. Environmental Monitoring and Assessment, 98: 175-190.

Spindler, K.M. and Olyphant, G.A., 2004. Geophysical investigations at an abandoned mine site subjected to reclamation using coal-combustion byproducts. Environmental & Engineering Geoscience, 10(3): 243-251.

Olyphant, G.A., 2003. Temporal and spatial (down profile) variability of unsaturated soil hydraulic properties determined from a combination of repeated field experiments and inverse modeling. Journal of Hydrology, 281: 23-35.

Olyphant, G.A., Thomas, J., Whitman, R.L., and Harper, D., 2003. Characterization and statistical modeling of bacterial (Escherichia Coli) outflows from watersheds that discharge into southern Lake Michigan. Environmental Monitoring and Assessment, Special Issue on EMAP Symposium 2001: Coastal Monitoring through Partnerships, 81:289-300.

Olyphant, G.A., Alhawas, A., and Fraser, G.S., 2001. Numerical simulation of the response of alluvial channel networks to varying inflows of water and sediment. In Harmon, R.S. (Ed.) Landscape Erosion and Evolution Modeling, Kluwer Academic Publishers, Dordrecht, pp. 447-476.

Alsaaran, N. and Olyphant, G.A., 1998, A model for simulating of rock-water interactions in a weathering profile subjected to frequent alternations of wetting and drying. Catena, 32: 225-243.

Bennett, S.W. and Olyphant, G.A., 1998. Temporal and spatial variability in rates of eolian transport determined from automated sand traps: Indiana Dunes National Lakeshore, U.S.A. Journal of Coastal Research, 14(1): 283-290.

Carlson,C.P., and Olyphant, G.A., 1996. The role of gully stabilization in abandoned mine lands reclamation. Environmental and Engineering Geoscience, 2(3): 393-405.

Olyphant, G.A. and Harper, D., 1995. Effects of direct revegetation on hydrology, chemistry, and erosion of abandoned mine refuse. Geomorphology, 11: 261-273.

Olyphant, G.A. and Bennett, S.W., 1994. Contemporary and historical rates of eolian sand transport in the Indiana Dunes area of southern Lake Michigan. Journal of Great Lakes Research, 20(1): 153-162.


Founding member Interagency Task Force on E. coli

Steering Committee Indiana University Research and Teaching Preserve

Laboratory Facilities

Computer Lab (CGDA Annex) GY524

Field Operations Laboratory (CDGA) S318