Articles | Volume 29, issue 13
https://doi.org/10.5194/hess-29-2863-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-29-2863-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Technical note
| 
08 Jul 2025
Technical note |
| 08 Jul 2025
| 08 Jul 2025
Technical note: A new laboratory approach to extract soil water for stable isotope analysis from large soil samples
Institute of Hydrodynamics of the Czech Academy of Sciences, Prague, 160 00, Czech Republic
Department of Physical Geography and Geoecology, Faculty of Science, Charles University, Prague, 128 00, Czech Republic
Jan Haidl
Institute of Hydrodynamics of the Czech Academy of Sciences, Prague, 160 00, Czech Republic
Ondrej Gebousky
Institute of Hydrodynamics of the Czech Academy of Sciences, Prague, 160 00, Czech Republic
Kristyna Falatkova
Institute of Hydrodynamics of the Czech Academy of Sciences, Prague, 160 00, Czech Republic
Vaclav Sipek
Institute of Hydrodynamics of the Czech Academy of Sciences, Prague, 160 00, Czech Republic
Martin Sanda
Department of Landscape Water Conservation, Faculty of Civil Engineering, Czech Technical University, Prague, 166 29, Czech Republic
Natalie Orlowski
Chair of Forest Sites and Hydrology, Institute of Soil Science and Site Ecology, Technical University Dresden, 01737 Tharandt, Germany
Lukas Vlcek
Institute of Hydrodynamics of the Czech Academy of Sciences, Prague, 160 00, Czech Republic
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This study describes a unique large-scale isotope dataset to study water dynamics in European forests. Researchers collected data from 40 beech and spruce forest sites in spring and summer 2023, using a standardized method to ensure consistency. The results show that water sources for trees change between seasons and vary by tree species. This large dataset offers valuable information for understanding plant water use, improving ecohydrological models, and mapping water cycles across Europe.
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Climate change in Central Europe results in the gradual replacement of spruce trees with beech. To model its potential impact, we used 22-year data of soil moisture under both tree species. The drier the summer season, the greater the difference between the two: the main reason was the higher transpiration of beech canopy compared to spruce. We conclude that as a result, changes in the seasonal water availability can be expected.
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Short summary
We present a novel method for soil water extraction – circulating-air soil water extraction – together with a newly developed apparatus specifically designed for its purposes. The method has been tested across a range of soil types, demonstrating an accuracy level that matches or surpasses that of conventional extraction techniques. The apparatus is optimized for small-scale, high-precision studies in which an unambiguous determination of the water origin is required.
We present a novel method for soil water extraction – circulating-air soil water extraction –...
