ilhan özgen xian

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Research interests

  • terrestrial ecohydrology
  • ecohydrological model development
  • disturbance ecology


  • 2021–present
    Assistant Professor, TU Braunschweig, Germany
    Affiliate Faculty, Berkeley Lab, USA
  • 2018–2021
    Postdoc, Berkeley Lab, USA
  • 2018
    Postdoc, AICS RIKEN, Japan
  • 2017
    PhD, Computational Hydrology, TU Berlin, Germany
  • 2012–2017
    Research Associate, TU Berlin, Germany
  • 2011
    MSc, Civil Engineering, TU Berlin, Germany

Invited talks

  • Climate emergency calls for process-based modelling, 30 Mar 2022, UWI Guest Lecture, Technische Universität Berlin, Germany.
  • Integrated surface–subsurface flow simulations in a mountainous catchment in Colorado, USA, 11 Feb 2022, Institute of Water and River Basin Management, Karlsruhe Institute of Technology, Germany.
  • Contributions to the modeling of environmental flows in computational hydrology, In: Water Engineering and Development Centre seminar series, 15 Oct 2020, Loughborough University, Loughborough, UK.
  • Hyperbolizing the zero-inertia equation, In: Seminar on recent advances in shallow flow modeling, 21 Mar 2019, Technische Universität Berlin, Berlin, Germany.
  • Some contributions to the numerical solution of the zero-inertia model, 8 Mar 2018, Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan.
  • Integral porosity shallow water models for urban flood forecasting, In: 8th AICS International Symposium, 8 Feb 2018, Kobe, Japan.
  • Coarse grid methods for the Godunov-type shallow water model, In: EuroAqua Colloquium, 25 Jan 2017, Brandenburgische Technische Universität Cottbus-Senftenberg, Cottbus, Germany.


Guest editor

Session organiser

  • The shallow water model intercomparison session: Benchmarking overland flow simulations, IAHR World Congress 2022, Granada, Spain.
    Coorganisers: D. Caviedes-Voullième, M. Morales-Hernández, X. Xia
  • Advances in modeling environmental flow across interfaces, SIAM Conference on Mathematical and Computational Issues in the Geosciences 2021, Milan, Italy.
    Coorganisers: K.T. Mandli, E. Matta
  • Advances in shallow flow modeling for water resources and hydrological engineering, AGU Fall Meeting 2019, San Francisco, USA.
    Coorganisers: M. Morales-Hernández, B.F. Sanders
  • Development and application of the next generation of shallow flow models, 13th International Conference on Hydroinformatics 2018, Palermo, Italy.
    Coorganisers: X. Xia, J. Hou, D. Liang, Q. Liang, R. Hinkelmann

Reviewer (selection)

  • Journal of Hydrology
  • Advances in Water Resources
  • Journal of Hydroinformatics


  • PhD committee member of F. Tügel, 2022
  • PhD committee member of J. Zhao, 2019

Honours and awards

  • Argonne Training Program on Extreme-scale Computing — Selected Participant, 2019
  • Chorafas Foundation Award in Engineering of Finance and Risk Management, 2017
  • Dr.-Ing. Ernst Trapp Award, 2012


  • American Geophysical Union
  • European Geosciences Union