University of California, Riverside

Environmental Sciences

Jirka Šimunek

Jirka Šimunek

Jirka Šimunek Photo

Soil Physicist/Hydrologist

Academic Degrees:

  • Ph.D. 1993 Hydrology, Czech Academy of Sciences, Prague, Czech Republic
  • M.S. 1984 Civil Engineering, Czech Technical University, Prague, Czech Republic


  • Numerical Modeling of water flow and solute transport
  • Parameter Estimation of soil hydraulic properties
  • Major Ion Chemistry modeling of biogeochemical processes
  • Transport Processes in one and multi dimensions with various equilibrium and nonequilibrium solutes in variably saturated porous media

Research Group:

    Representative Publications (out of 283 peer-reviewed journal articles):

    • Brunetti, G., J. Šimůnek, M. Turco, and P. Piro, On the use of surrogate-based modeling for the numerical analysis of Low Impact Development techniques, Journal of Hydrology, 548, 263-277, doi: 10.1016/j.jhydrol.2017.03.013, 2017.
    • Šimůnek, J., M. Th. van Genuchten, and M. Šejna, Recent developments and applications of the HYDRUS computer software packages, Vadose Zone Journal, 15(7), pp. 25, doi: 10.2136/vzj2016.04.0033, 2016.
    • Brunetti, G., J. Šimůnek, and P. Piro, A comprehensive analysis of the variably-saturated hydraulic behavior of a green roof in Mediterranean climate, Vadose Zone Journal, 15 (9), pp. 15, doi: 10.2136/vzj2016.04.0032, 2016.
    • Šimůnek, J., K. L. Bristow, S. A. Helalia, and A. A. Siyal, The effect of different fertigation strategies and furrow surface treatments on plant water and nitrogen use, Irrigation Science, 34(1), 53-69, doi:10.1007/s00271-015-0487-z, 2016.
    • Šimůnek, J., M. Th. van Genuchten, and M. Šejna, HYDRUS: Model use, calibration and validation, Special issue on Standard/Engineering Procedures for Model Calibration and Validation, Transactions of the ASABE, 55(4), 1261-1274, 2012.
    • Šimůnek, J. and J. W. Hopmans, Modeling compensated root water and nutrient uptake, Ecological Modeling, doi:10.1016/j.ecolmodel.2008.11.004, 220(4), 505-521, 2009.
    • Šimůnek, J., M. Th. van Genuchten, and M. Šejna, Development and applications of the HYDRUS and STANMOD software packages, and related codes, Vadose Zone Journal, doi:10.2136/VZJ2007.0077, Special Issue “Vadose Zone Modeling”, 7(2), 587-600, 2008.
    • Šimůnek, J. and M. Th. van Genuchten, Modeling nonequilibrium flow and transport with HYDRUS, Vadose Zone Journal, doi:10.2136/VZJ2007.0074, Special Issue “Vadose Zone Modeling”, 7(2), 782-797, 2008.
    • Bradford, S. A., J. Šimunek, M. Bettahar, M. Th. van Genuchten, and S. R. Yates, Significance of straining in colloid deposition: evidence and implications, Water Resour. Res., 42, W12S15, doi:10.1029/2005WR004791, 16 pp., 2006.
    • Gonçalves, M. C., J. Šimunek, T. B. Ramos, J. C. Martins, M. J. Neves, and F. P. Pires, Multicomponent solute transport in soil lysimeters irrigated with waters of different quality, Water Resour. Res., 42, W08401, doi:10.1029/2006WR004802, 17 pp., 2006.

    Courses Taught:

    • SWSC107/ENWC207 - Soil Physics
    • SWSC207/ENSC207 - Vadose Zone Processes
    • SWSC202/ENSC202 - Introduction to Environmental Modeling
    • ENSC191 - Seminar in the Professional Development

    Graduate Program Affiliations and Research Focus Areas:

    Honors and Awards

    • Don and Betty Kirkham Award, 2005
    • ESR International Fellow, New Zealand, 2006
    • CRCIF Visiting Fellow, Australia, 2007
    • Fellowship from the Japan Society for the Promotion of Science, Tokyo, Japan, 2008
    • Distinguished Visitor of the Blaustein Center for Scientific Cooperation of the Sede Boqer Campus, Ben Gurion University, Israel, 2009.
    • Soil Science Society of America Fellow, 2010.
    • American Geophysical Union Fellow, 2012
    • Journal of Hydrology Associate Editor Award Winner 2015
    • University of Southern Queensland Research Giant Award, 2015
    • American Society of Agronomy Fellow, 2016
    • Sir Frederick McMaster Fellowship, 2016, CSIRO, Australia
    • American Association for the Advancement of Science (AAAS) Fellow, 2016


    More Information

    General Campus Information

    University of California, Riverside
    900 University Ave.
    Riverside, CA 92521
    Tel: (951) 827-1012

    Department Information

    Environmental Sciences
    Geology 2460

    Tel: (951) 827-5116
    Fax: (951) 827-4652