Robert J. Ryan

Associate Professor of Instruction in Civil and Environmental Engineering

Office Hours

Monday and Wednesday 2:00 PM - 3:00 PM
Tuesday 11:00 AM - 12:00PM


Dr. Robert Ryan is an Associate Professor of Instruction in the Department of Civil and Environmental Engineering at Temple University and a licensed professional engineer in the Commonwealth of Pennsylvania. His research interests are focused on urban stream hydrology and hydraulics with a special interest in hyporheic exchange, riparian corridor/stream channel interactions and stormwater management. Dr Ryan's research has been published in highly regarded peer-reviewed journals.


  • Ph.D. Environmental Engineering, Drexel University, 2004
  • M.E. Engineering Management, Widener University, 1996
  • B.S. Environmental Engineering, The Pennsylvania State University, 1985

Academic Appointments 

  • Associate Professor of Instruction, Department of Civil and Enviornmental Engineering, Temple University, June 2013 - present
  • Assistant Professor (Teaching/Instruction), Department of Civil and Environmental Engineering, Temple University, September 2007-June 2013
  • Visiting Assistant Professor, Department of Civil Engineering, Widener University, September 2006-May 2007
  • Post Doctoral Research Fellow, Department of Civil and Environmental Engineering, Temple University, July 2004-June 2006

Recent Publications 

  • Toran, L.T., J.E. Nyquist, A.C. Fang, R.J. Ryan, D.O. Rosenberry, April 2012 (online), Observing lingering hyporheic storage using electrical resistivity: variations around stream restoration structures, Hydrologic Processes, doi: 10.1002/hyp.9269
  • Toran, L.T., B. Hughes, J.E. Nyquist, R.J. Ryan,  Feb 2012, Using hydrogeophysics to monitor change in hyporheic flow around stream restoration structures, Environmental and Engineering Geoscience, 18, 83-97, doi:10.2113/gseegeosci.18.1.83
  • Ryan, R.J., P. Larson, C. Welty, March 2011, The logistics and mechanics of conducting tracer injection experiments in an urban stream, Urban Ecosystems doi:10.1007/s11252-010-0144-5
  • Ryan, R.J., C. Welty, P.Larson, Oct 2010, Variation in surface water-groundwater exchange with land use in an urban stream, Journal of Hydrology 392, 1-11, doi:10.1016/j.jhydrol.2010.06.004
  • Ryan, R.J., M.C. Boufadel, May 2007, Lateral and longitudinal variation of hyporheic exchange in a piedmont stream pool, Environmental Science and Technology, 41, 4221-4226, doi:10.1021/es061603z

Research Interest 

  • Urban hydrology and hydraulics
  • Hyporheic exchange
  • Stormwater management

Funding Sources

  • National Science Foundation
  • Temple University