Earth System Science Data
Earth System Science Data
Earth System Science Data
Articles | Volume 18, issue 1
Articles | Volume 18, issue 1
https://doi.org/10.5194/essd-18-691-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-18-691-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 1
Data description paper
 | 
28 Jan 2026
Data description paper |  | 28 Jan 2026

QUADICA v2: extending the large-sample data set for water QUAlity, DIscharge and Catchment Attributes in Germany

Pia Ebeling, Alexander Hubig, Alexander Wachholz, Ulrike Scharfenberger, Sarah Haug, Tam Nguyen, Fanny Sarrazin, Masooma Batool, Andreas Musolff, and Rohini Kumar

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Short summary
The updated river water quality data set for Germany offers longer records, new variables such as water temperature and oxygen, and time series of pollution sources, and it adds more stations with both water quality and flow data. These improvements provide clearer insights into how stream water quality changes over time and how human activities affect aquatic ecosystems.
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