- Ph.D., Civil and Environmental Engineering, 2013 – Virginia Polytechnic Institute and State University (Virginia Tech)
- M.S., Civil Engineering, 1999 – Virginia Tech
- B.S., Civil Engineering, 1997 – Virginia Tech
- Assistant Professor, Washington State University, 2013 – present
- Graduate Research Assistant, Civil and Environmental Engineering, Virginia Tech, 2007 – 2013
- Assistant Professor, Virginia Commonwealth University in Qatar, 2004 – 2007
- Hydrodynamics of rivers and streams
- Transport of granular and fine-grained sediment
- Field measurements of river flow and sediment processes
- Computational fluid dynamics
- Impact of hydropower operations on river morphology and ecology
- Riverbank erosion and stability
- Mechanics of sediment transport
- Open Channel Flow
- Advanced hydrology
- Petrie, J., P. Diplas, M. Gutierrez, and S. Nam (2014), Characterizing the mean flow field in rivers for resource and environmental impact assessments of hydrokinetic energy generation sites, Renewable Energy, 69, 393-401, doi:10.1016/j.renene.2014.03.064.
- Petrie, J., P. Diplas, M. Gutierrez, and S. Nam (2013), Combining fixed- and moving-vessel acoustic Doppler current profiler measurements for improved characterization of the mean flow in a natural river, Water Resources Research, 49, 5600-5614, doi:10.1002/wrcr.20396.
- Petrie, J., P. Diplas, M. Gutierrez, and S. Nam (2013), Data evaluation for acoustic Doppler current profiler measurements obtained at fixed locations in a natural river, Water Resources Research, 49, 1003–1013, doi:10.1002/wrcr.20112.
- Nam, S., M. Gutierrez, P. Diplas, and J. Petrie (2011), Determination of the shear strength of unsaturated soils using the multistage direct shear test, Engineering Geology, 122(3–4), 272–280, doi:10.1016/j.enggeo.2011.06.003.
- Nam, S., M. Gutierrez, P. Diplas, J. Petrie, A. Wayllace, N. Lu, and J. J. Munoz (2010),Comparison of testing techniques and models for establishing the SWCC of riverbank soils, Engineering Geology, 110(1–2), 1–10,doi:10.1016/j.enggeo.2009.09.003.
- Petrie, J., and P. Diplas (2008), Comment on “Enhancement and Inhibition of Denitrification by Fluid-Flow and Dissolved Oxygen Flux to Stream Sediments”, Environmental Science and Technology, 42(22), 8609-8610.
- Petrie, J., and P. Diplas (2000), Statistical approach to sediment sampling accuracy, Water Resources Research, 36(2), 597-605.