Chris Rehmann


Cerwick Faculty Professor
Associate Professor
Civil, Construction and Environmental Engineering


476 Town Engineering Building
813 Bissell Rd
Ames, IA 50011-1066


Dr. Rehmann’s research in environmental fluid mechanics has built on his initial focus of mixing and turbulence in stratified water bodies. His projects include experiments and modeling of differential mixing of salinity and temperature, the interaction of turbulence and double diffusion, mixing near bubble plumes and boundary mixing in lakes. His group has also worked on river mixing by assessing acoustic measurements of velocity, turbulence and discharge and used acoustic measurements to determine dispersion in streams. He has applied his knowledge of mixing and transport in interdisciplinary collaborations involving the fate and transport of zebra mussel larvae, pathogens, and antibiotic resistance genes in rivers. Recent work on contamination caused by flooding involves a strong focus on environmental justice. Dr. Rehmann teaches courses in engineering hydraulics, groundwater hydrology and environmental flows. He is the associate chair for undergraduate affairs for the Department of Civil, Construction, and Environmental Engineering. In that position, he works with faculty, staff and students on a wide range of issues to foster student success.

Honors and Awards

  • Board of Regents Award for Faculty Excellence – Iowa State University, 2020
  • Faculty-Staff Inspiration Award – Iowa State University Alumni Association, 2019
  • Superior Engineering Teacher – Iowa State University College of Engineering, 2011
  • Robert E. Miller Award for Teaching of Mechanics – University of Illinois, 2003
  • Woods Hole Oceanographic Institution Postdoctoral Scholarship – 1996


  • Pathways to exposure to pathogens during floods, PI with K. Ikuma, P.R. Jackson, and P.L. Lenaker, supported by the U.S. Geological Survey/National Institutes for Water Resources.
  • Building resilience in vulnerable older adult communities facing repeated flooding and increased exposure risks to untreated wastewater in Puerto Rico, with K. Ikuma (PI), C. Poleacovschi, C.F. Weems, and I. Garcia Zambrana, supported by the U.S. Environmental Protection Agency.
  • iRecognizeU: Finding the pathway to increasing women civil engineering students feeling of recognition to develop an engineering identity, with C.J. Rutherford (PI), A. Karabalut-Ilgu, B. Ahn, and E. Baran, supported by the National Science Foundation.
  • Environmental field evaluation of potassium acetate, PI with K. Ikuma and M.A. Perez, supported by the Minnesota Department of Transportation.
  • In-situ performance evaluation of bioretention intake systems, PI with K. Ikuma and M.A. Perez, supported by the Iowa Department of Agriculture and Land Stewardship and City of Johnston.


  • Ph.D. Civil Engineering – Stanford University, 1995
  • M.S. Civil Engineering – Stanford University, 1990
  • B.S. Civil Engineering – Massachusetts Institute of Technology, 1989

Interest Areas

  • Mixing and transport of contaminants in natural flows
  • Environmental fluid mechanics


  1. Dickey, L.C., McEachran, A.R., Rutherford, C.J., Rehmann, C.R., Perez, M.A., Groh, T.A., and Isenhart, T.M. 2021 Slope stability of streambanks at saturated riparian buffer sites. Journal of Environmental Quality, 50, 1430-1439, doi: 10.1002/ jeq2.20281.
  2. Rehmann, C.R., Jackson, P.R., and Puglis, H.J. 2021 Predicting the spatiotemporal exposure of aquatic species to intrusions of fire retardant in streams with limited data. Science of the Total Environment, 782(3), doi: 10.1016/j.scitotenv.2021. 146879.
  3. McEachran, A.R., Dickey, L.C., Rehmann, C.R., Groh, T.A., Isenhart, T.M., Perez, M.A., and Rutherford, C.J. 2020 Improving the effectiveness of saturated riparian buffers for removing nitrate from subsurface drainage. Journal of Environmental Quality, doi: 10.1002/jeq2.20160.
  4. Ikuma, K. and Rehmann, C.R. 2020 Importance of extracellular DNA in the fate and transport of antibiotic resistance genes downstream of a wastewater treatment plant. Environmental Engineering Science, doi: 10.1089/ees.2019.0319.
  5. Alfawan, F., Alleman, J.E., and Rehmann, C.R. 2019 Wind energy assessment for NEOM City, Saudi Arabia, Energy Science and Engineering, 00:1–13, doi: 10.1002/ese3.548.
  6. Xie, S., Hill, A.L., Rehmann, C.R., and Levy, M.Z. 2019 Dynamics of bed bug infestations and control under disclosure policies. Proceedings of the National Academy of Sciences, 116(13), 6473-6481, doi: 10.1073/pnas.1814647116.
  7. Maroney, C.L. and Rehmann C.R. 2017 Stream depletion rate for a radial collector well in an unconfined aquifer near a fully penetrating river, Journal of Hydrology, 547, 732-741. doi: 10.1016/j.jhydrol.2017.02.010.