Scaling the Danish national water resources model for a pan-European quasi-3D groundwater resources model
DOI:
https://doi.org/10.34194/geusb.v53.8335Keywords:
aquifers, Europe, groundwater resources, quasi-3D groundwater resource model, upscaling hydrostratigraphic layer modelAbstract
In this study, we upscale and simplify hydrostratigraphic information from a detailed model for Denmark to a pan-European scale. This is part of a larger project to develop a harmonised overview of the volume and depth of groundwater resources in a quasi-3D European groundwater resource model. A 10 km grid and a maximum of c. 10 hydrostratigraphic layers were chosen as the common scale for the European database. The Danish information is based on the national water resources model (the DK-model), where the information is significantly more detailed (100 m grid and up to 26 layers). Information was transferred from the DK-model to the quasi-3D model by a method involving computations of mean volumes and expert assessment to reduce layers in each cell. In this process, detailed hydrostratigraphic information is lost, which could otherwise be used for local groundwater flow modelling in Denmark. However, the strength of the quasi-3D model is that it still contains the volumes of all hydrostratigraphic units, both the saturated and unsaturated parts. Hence, the upscaled model can contribute to a relatively precise calculation of European groundwater resources for the quantitative assessment of groundwater status across Europe at a 10 × 10 km scale.
Downloads
References
Andersen, L.T., Mortensen, M.H., Troldborg, L. & Hinsby, K. 2021: GeoERA RESOURCE GROUNDWATER Deliverable 6.6. Justification of the Choices to Compile the Pan-EU Groundwater Resources Maps by All Participating Countries – Metadata Denmark. 52–62. https://repository.europe-geology.eu/egdidocs/resource/geoera%2Bresource%2Bdeliverable%2B66%2Bjustification%2Bof%2Bc.pdf (accessed September 2023)
EGDI (European Geological Data Infrastructure) 2022: Pan-European Groundwater Resource Map: Volumes and Depths of Prime European Aquifers. https://data.geus.dk/egdi/?mapname=egdi_new_structure#baslay=baseMapGEUS&extent=-710780,1211800,6797980,5204710&layers=resource_netcdf11 (accessed November 2022)
Hollis, J. et al. 2022: Pan-European geological data, information, and knowledge for a resilient, sustainable, and collaborative future. European Geologist 53, 5–19. https://doi.org/10.5281/zenodo.6883282
Høyer, A.S., Jørgensen, F., Piotrowski, J.A. & Jakobsen, P.R. 2013: Deeply rooted glaciotectonism in western Denmark: Geological composition, structural characteristics and the origin of Varde hill-island. Journal of Quaternary Science 28(7), 683–696. https://doi.org/10.1002/jqs.2667
Kivits, T., Janza, M. & Broers, H.P. 2020: GeoERA RESOURCE GROUNDWATER Deliverable 6.2. Database with information on volumes and depths at 10x10 and/or 25x25 km grids, 28 pp. https://repository.europe-geology.eu/egdidocs/resource/geoera%2Bresource%2Bdeliverable%2B62%2Bdatabase%2Bwith%2Binfo.pdf (accessed September 2023)
Kivits, T., Rasmussen, V. & Broers, H.P. 2021: GeoERA RESOURCE GROUNDWATER Deliverable 6.4. Dataset to be included in the Information platform, 10 pp. https://repository.europe-geology.eu/egdidocs/resource/geoera%2Bresource%2Bdeliverable%2B64%2Bdataset%2Bto%2Bbe%2Bincl.pdf (accessed September 2023)
Pedersen, S.A.S., Gravesen, P. & Hinsby, K. 2018: Chalk-glacitectonite, an important lithology in former glaciated terrains covering chalk and limestone bedrock. Geological Survey of Denmark and Greenland Bulletin 41, 21–24. https://doi.org/10.34194/geusb.v41.4333
Sandersen, P.B.E. & Jørgensen, F. 2017: Buried tunnel valleys in Denmark and their impact on the geological architecture of the subsurface. GEUS Bulletin 38, 13–16. https://doi.org/10.34194/geusb.v38.4388
Schoonderwoerd, E., Essink, O.G., Bos-Burgering, L., Kivits, T., Zaadnoordijk, W.J. & Broers, H.P. 2021: GeoERA RESOURCE GROUNDWATER – Deliverable 6.5. Water balance terms for the EU fresh groundwater grid. 32 pp. https://repository.europe-geology.eu/egdidocs/resource/geoera%2Bresource%2Bdeliverable%2B65%2Bwater%2Bbalance%2Bterm.pdf (accessed September 2023)
Stisen, S., Ondracek, M., Troldborg, L., Schneider, R.J.M. & John van Til, M. 2019: National Vandressource Model – Modelopstilling og kalibrering af DK-model 2019. Danmarks og Grønlands Geologiske undersøgelse Rapport 2019/31, 1–125. https://doi.org/10.22008/gpub/32631
Zhang, X. et al. 2021: Application of upscaling methods for fluid flow and mass transport in multi-scale heterogeneous media: A critical review. Applied Energy 303, 117603. https://doi.org/https://doi.org/10.1016/j.apenergy.2021.117603
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2023 Lærke Therese Andersen, Anne-Sophie Høyer, Mette Hilleke Mortensen, Lars Troldborg, Klaus Hinsby
This work is licensed under a Creative Commons Attribution 4.0 International License.
GEUS Bulletin is an open-access, peer-reviewed journal published by the Geological Survey of Denmark and Greenland (GEUS). This article is distributed under a CC-BY 4.0 licence, permitting free redistribution and reproduction for any purpose, even commercial, provided proper citation of the original work. Author(s) retain copyright over the article contents. Read the full open access policy.
