Faculty/Staff Directory

Chris R. Rehmann

  • Associate Professor, Associate Chair for Undergraduate Affairs
  • Civil, Construction and Environmental Engineering

Main Office

476 Town Engr
Ames, IA 50011-1066
Phone: 515-294-1203
Fax: 515-294-8216


  • 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

Brief Biography

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 transport of zebra mussel larvae and the fate and transport of pathogens in rivers. Dr. Rehmann teaches courses in engineering hydraulics, groundwater hydrology and environmental flows. Currently, 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

  • Superior Engineering Teacher - Iowa State University College of Engineering, 2011
  • Charles W. Schafer Award for Excellence in Teaching, Research, and Service - 2007, 2013
  • Robert E. Miller Award for Teaching of Mechanics - University of Illinois, 2003
  • Woods Hole Oceanographic Institution Postdoctoral Scholarship - 1996


  • Improving traffic safety through better snow fences: Image based methods to measure trapped snow volume and the snow relocation coefficient, with G. Constantinescu (PI) and M. Muste, supported by the Midwest Transportation Center
  • Water and Climate Change (WACC): Building community consensus for a sustainable future for Iowa, the nation, and the world, with W.J. Gutowski (PI), K. Franz, J. Goodwin, W.W. Simpkins, L. Tesfatsion, and A. D. Wanamaker, supported by the Signature Research Initiative of the ISU College of Liberal Arts and Sciences
  • Molecular tagging techniques for stratified flow: Application to boundary mixing, PI with H. Hu, supported by the National Science Foundation.
  • A model for turbulence in strongly stratified natural flows, supported by the National Science Foundation

Selected Publications

  1. Rehmann, C.R. (2015) "Explicit estimates of arrival times for dispersion in rivers," Journal of Hydraulic Engineering, 10.1061/(ASCE)HY.1943-7900.0001051.
  2. Schwab, L.E. and Rehmann, C.R. (2015) "Importance of vertical variation of velocity for shear dispersion in rivers," Journal of Hydraulic Engineering, 10.1061/(ASCE)HY.1943-7900.0001031.
  3. Jackson, P.R. and Rehmann, C.R. (2014) "Experiments on differential scalar mixing in turbulence in a sheared, stratified flow," Journal of Physical Oceanography, Vol. 44, 2661-2680.
  4. Jefferson, J. L., and Rehmann, C. R. (2014) "Rapid distortion theory for mixing efficiency of a flow stratified by one or two scalars," Dynamics of Atmospheres and Oceans, Vol. 65, pp. 107-123 (DOI: http://dx.doi.org/10.1016/j.dynatmoce.2013.12.002).
  5. Schmalle, G. F., and Rehmann, C. R. (2014) "Analytical solution of a model of contaminant transport in the advective zone of a river," Journal of Hydraulic Engineering, Vol. 40, 04014029. (DOI: http://dx.doi.org/10.1061/(ASCE)HY.1943-7900.0000885)
  6. Jackson, P. R., and Rehmann, C. R. (2014) "Experiments of differential scalar mixing in turbulence in a sheared, stratified flow," Journal of Physical Oceanography, Vol. 44, pp. 2661-2680 (DOI: http://dx.doi.org/10.1175/JPO-D-14-0027.1).
  7. Wain, D. J., Kohn, M. S., Scanlon, J. A., and Rehmann, C. R. (2014) "Internal wave driven transport of fluid away from the boundary of a lake," Limnology and Oceanography,  Vol. 58, pp. 429-442 (DOI: http://dx.doi.org/10.4319/lo.2013.58.2.0429).
  8. Socolofsky, S. A., and Rehmann, C. R. (2012) "Bubble plumes," in Handbook of Environmental Fluid Dynamics, H. J. S. Fernando ed., Taylor & Francis (DOI: http://dx.doi.org/10.1201/b13691-7).