Articles | Volume 17, issue 1
https://doi.org/10.5194/gmd-17-275-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-17-275-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
GLOBGM v1.0: a parallel implementation of a 30 arcsec PCR-GLOBWB-MODFLOW global-scale groundwater model
Jarno Verkaik
CORRESPONDING AUTHOR
Unit Subsurface and Groundwater Systems, Deltares, Utrecht, the Netherlands
Department of Physical Geography, Faculty of Geosciences, Utrecht University, Utrecht, the Netherlands
Edwin H. Sutanudjaja
Department of Physical Geography, Faculty of Geosciences, Utrecht University, Utrecht, the Netherlands
Gualbert H. P. Oude Essink
Unit Subsurface and Groundwater Systems, Deltares, Utrecht, the Netherlands
Department of Physical Geography, Faculty of Geosciences, Utrecht University, Utrecht, the Netherlands
Hai Xiang Lin
Department of Applied Mathematical Analysis, Faculty of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, Delft, the Netherlands
Institute of Environmental Sciences, Faculty of Science, Leiden University, Leiden, the Netherlands
Marc F. P. Bierkens
Department of Physical Geography, Faculty of Geosciences, Utrecht University, Utrecht, the Netherlands
Unit Subsurface and Groundwater Systems, Deltares, Utrecht, the Netherlands
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Saved (final revised paper)
Latest update: 30 Sep 2026
Short summary
This paper presents the parallel PCR-GLOBWB global-scale groundwater model at 30 arcsec resolution (~1 km at the Equator). Named GLOBGM v1.0, this model is a follow-up of the 5 arcmin (~10 km) model, aiming for a higher-resolution simulation of worldwide fresh groundwater reserves under climate change and excessive pumping. For a long transient simulation using a parallel prototype of MODFLOW 6, we show that our implementation is efficient for a relatively low number of processor cores.
This paper presents the parallel PCR-GLOBWB global-scale groundwater model at 30 arcsec...