EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Impact of climate change on the water balance of the Thaya basin

Juraj Parajka1, Adam Vizina2, Jürgen Komma1, Peter Valent1, Petr Štepánek3, Klaus Haslinger4, Theresa Schellander-Gorgas4, Marek Viskot5, Milan Fischer3, Walter Froschauer6, Mirek Trnka3, and Günter Blöschl1
Juraj Parajka et al.
  • 1Institute of Hydraulic Engineering and Water Resources Management, Faculty of Civil Engineering, Vienna University of Technology, Vienna, Austria
  • 2T.G. Masaryk Water Research Institute: Prague, Prague, Czech Republic
  • 3CzechGlobe — Global Change Research Centre AV CR, Czech Republic
  • 4Central Institute for Meteorology and Geodynamics (ZAMG), Vienna, Austria
  • 5Moravia River Management Company, Brno, Czech Republic
  • 6Amt der Niederösterreichischen Landesregierung, Abteilung Wasserwirtschaft, St. Pölten, Austria

The Thaya is a trans-national river basin that is situated in the Czech Republic and Austria. Different human activities in the basin and multiple water uses increase the water demand. This increase, combined with the recent droughts events in 2017 and 2018, has recently resulted in reconsidering the water management strategies for future climates. This contribution aims to evaluate the effect of climate change on the water balance of the Thaya. The aim is to apply two different hydrological models in an identical setting (the same model inputs, scenarios, and regional and water use data) and to identify water availability and its change under various climate and water use scenarios. The assessments compare BILAN and TUWmodel hydrological models coupled with the WATERRES water use module and a large sample of climate projections (the CMIP5 and CMIP6 models), which represent various socioeconomic pathways combined with projections of possible changes in water use. The results will demonstrate an insight into how the water balance in different parts of the Thaya basin has changed in the past and what are the possible effects of climate change on these water resources in the future.

How to cite: Parajka, J., Vizina, A., Komma, J., Valent, P., Štepánek, P., Haslinger, K., Schellander-Gorgas, T., Viskot, M., Fischer, M., Froschauer, W., Trnka, M., and Blöschl, G.: Impact of climate change on the water balance of the Thaya basin, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-14941,, 2023.