ilhan özgen xian

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Bu dervişlik bir dilektir
Bilene büyük devlettir
Yensiz yakasız gömlektir
Giyemezsin demedim mi?

— folk song, Bu dervişlik bir dilektir

Research interests


  • terrestrial ecohydrology
  • plant hydraulics and plant ecophysiology


  • finite volume and discontinuous Galerkin methods
  • dynamical systems theory


  • 2021–now
    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

  • Computational hydrology sucks, 4 Oct 2023, GeoForschungsZentrum, Potsdam, Germany.
  • Modelling the soil-plant-atmosphere continuum to assess tree mortality and wildfire risk, 11 Oct 2022, Universidad de Zaragoza, Zaragoza, Spain.
  • Wasser in Zeiten des Klimawandels, 25 Aug 2022, phaeno Science Talk, phaeno, Wolfsburg, Germany.
  • Climate emergency calls for process-based modelling, 30 Mar 2022, UWI Guest Lecture, Technische Universität Berlin, 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, Water Engineering and Development Centre seminar series, 15 Oct 2020, Loughborough University, Loughborough, UK.
  • Hyperbolizing the zero-inertia equation, 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, 8th AICS International Symposium, 8 Feb 2018, Kobe, Japan.
  • Coarse grid methods for the Godunov-type shallow water model, EuroAqua Colloquium, 25 Jan 2017, Brandenburgische Technische Universität Cottbus-Senftenberg, Cottbus, Germany.



  • 2022–now
    Frontiers in Ecology and Evolution, Review Editor.

Guest editor

  • Numerical methods for environmental flow modeling, International Journal on Geomathematics, 2022. Coorganisers: K.T. Mandli, E. Matta
  • Innovations towards the next generation shallow flow models, Advances in Water Resources, 2020. Coorganisers: X. Xia, J. Hou, D. Liang, Q. Liang, R. Hinkelmann

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


Refereed for several journals since about 2015.

I am prioritising papers of journals associated with scientific societies in my field. I currently decline to referee papers for journals published by certain publishers who charge our university library excessive prices. See a statement by six scientific societies° and a text by Randy LeVeque° for more information on the current state of academic publishing.


  • European Geosciences Union
  • International Society for Porous Media
  • Deutsche Hydrologische Gesellschaft


Author: ilhan özgen xian

Created: 2024-02-15 Thu 08:36