Geoscientific Model Development
Geoscientific Model Development
GMD
Articles | Volume 17, issue 17
Articles | Volume 17, issue 17
https://doi.org/10.5194/gmd-17-6819-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-17-6819-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 17
Development and technical paper
 | 
12 Sep 2024
Development and technical paper |  | 12 Sep 2024

Regionalization in global hydrological models and its impact on runoff simulations: a case study using WaterGAP3 (v 1.0.0)

Jenny Kupzig, Nina Kupzig, and Martina Flörke

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Latest update: 03 Nov 2025
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Short summary
Valid simulation results from global hydrological models (GHMs) are essential, e.g., to studying climate change impacts. Adapting GHMs to ungauged basins requires regionalization, enabling valid simulations. In this study, we highlight the impact of regionalization of GHMs on runoff simulations using an ensemble of regionalization methods for WaterGAP3. We have found that regionalization leads to temporally and spatially varying uncertainty, potentially reaching up to inter-model differences.
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