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

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

doi:10.5194/essd-18-691-2026

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

Data sets

QUADICA v2 - water quality, discharge and catchment attributes for large-sample studies in Germany, HydroShare P. Ebeling et al. https://doi.org/10.4211/hs.c2866cd416b94ca386deb5758834311f

WQQDB – water quality and quantity 40 data base Germany: metadata A. Musolff https://doi.org/10.4211/hs.a42addcbd59a466a9aa56472dfef8721

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.