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| Created: | Jun 02, 2025 at 2:47 p.m. (UTC) | |
| Last updated: | Oct 16, 2025 at 12:27 p.m. (UTC) | |
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| Content types: | Multidimensional Content |
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Abstract
The project MEWS (Managing Events and Extremes in Water Supply) is a 3 year effort funded through the European Union Water4All partnership, and also with funding supplied by the funders associated with the participating countries. The project is led by Sweden with other participants from Germany, Israel, Denmark and Canada. The project is investigating the effects of hydroclimatic extreme events on drinking water supplies by examining the importance of not only the magnitude of extreme event inputs, but also the importance of the hydrodynamic regulation of the movement and processing of event water that moves through the water supply from inflow to withdrawal . Three water supplies under study are Lake Malaren Sweden, Lake Kinneret Israel , and the Ohra reservoir in Germany. The overriding goal of this project is to develop a freely available comprehensive modelling tool that will allow stakeholders to evaluate the effects of extreme hydro-climatic events on drinking water quality. More information is available at https://mews-water.com/
Here we provide a one-dimensional model setup for Lake Mälaren.
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Content
readme.md
MEWS 1D model setup, Lake Mälaren, Sweden
This is a one-dimensional (1D) model setup for Lake Mälaren, Sweden, as part of the MEWS project. It uses the coupled GOTM-Selmaprotbas model. The model is run in five sub-basins, named "A", "B", "C", "D", and "EF" (following Figure 1.2 in Sonesten et al., 2013, see "malaren_basins.png"). The outflow from "A" flows into "B", from "B" into "C", and from both "C" and "D" into basin "EF".
For an archive of the watershed simulations that are connected to this setup, see here.
Data origins
The meteorological data was obtained from ERA5 (Muñoz-Sabater et al. 2021). The inflow data originates from SMHI, gap-filled with the watershed simulations (see link above). The inflow nutrient concentrations are derived from the SLU environmental monitoring program and extended to a daily time series using the rloadest R package. The hypsograph is extracted from a bathymetric map of the lake.
Running the setup
The entire setup, calibrated configuration files, and output files are provided in the "Simulation" folder. However, if you want to run the model, you only have to run the "Run GOTM-SP for basins.R" script, which can be found in the "Scripts" folder (after ensuring you installed the necessary packages, following "Install packages.R")
The output files are in netcdf format and can be found in the "Simulation" folder, in the subfolder of each sub-basin. Several tools in R, Python, or other languages are available to visualise and download the output data.
Model versions
A Windows executable is provided. It uses the lake-branch of GOTM (after commit 9313560 (Aug 25, 2025), from https://github.com/gotm-model/code/tree/lake) and v1.1.0 of Selmaprotbas (after commit 445e731 (Sep 26, 2025), from https://github.com/jorritmesman/selmaprotbas). If the user wants to run this workflow on an OS other than Windows, they will have to compile an executable using these versions and ensure the "Run GOTM-SP for basins.R" script uses that executable.
References
- Muñoz-Sabater, J., Dutra, E., Agustí-Panareda, A., Albergel, C., Arduini, G., Balsamo, G., Boussetta, S., Choulga, M., Harrigan, S., Hersbach, H., Martens, B., Miralles, D.G., Piles, M., Rodríguez-Fernández, N.J., Zsoter, E., Buontempo, C., Thépaut, J.-N., 2021. ERA5-Land: a state-of-the-art global reanalysis dataset for land applications. Earth System Science Data 13(9) 4349-4383 doi:10.5194/essd-13-4349-2021
- Sonesten, L., Wallman, K., Axenrot, T., Beier, U., Drakare, S., Ecke, F., Goedkoop, W., Grandin, U., Köhler, S., Segersten, J., 2013. Mälaren: tillståndsutvecklingen 1965-2011. Sveriges lantbruksuniversitet, Institutionen för vatten och miljö
Credits
Funding Agencies
This resource was created using funding from the following sources:
| Agency Name | Award Title | Award Number |
|---|---|---|
| European Union Horizon 2020 program | Water4All Partnership | 101060874 |
| FORMAS | Hantera händelser och extrema förhållanden i vattenförsörjning | 2023-01872 |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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