GLOBGM v1.0: a parallel implementation of a 30&thinsp;arcsec PCR-GLOBWB-MODFLOW global-scale groundwater model

Verkaik, Jarno; Sutanudjaja, Edwin H.; Oude Essink, Gualbert H. P.; Lin, Hai Xiang; Bierkens, Marc F. P.

doi:https://doi.org/10.5194/gmd-17-275-2024

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.

https://doi.org/10.5194/gmd-17-275-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 1

Model description paper

|

12 Jan 2024

Model description paper |

| 12 Jan 2024

GLOBGM v1.0: a parallel implementation of a 30 arcsec PCR-GLOBWB-MODFLOW global-scale groundwater model

Jarno Verkaik, Edwin H. Sutanudjaja, Gualbert H. P. Oude Essink, Hai Xiang Lin, and Marc F. P. Bierkens

Supplement

https://doi.org/10.5194/gmd-17-275-2024-supplement

Data sets

Data supplement to the GLOBGM v1.0 Jarno Verkaik and Edwin H. Sutanudjaja https://doi.org/10.24416/UU01-44L775

Model code and software

Model input files and tools for the GLOBGM Jarno Verkaik and Edwin H. Sutanudjaja https://doi.org/10.5281/zenodo.7398200

Parallel MODFLOW 6.2.1 prototype release 0.1 Jarno Verkaik et al. https://doi.org/10.5281/zenodo.5778658

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.