Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 29, issue 23
Articles | Volume 29, issue 23
https://doi.org/10.5194/hess-29-6885-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-29-6885-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 29, issue 23
Research article
 | 
02 Dec 2025
Research article |  | 02 Dec 2025

Will groundwater-borne nutrients affect river eutrophication in the future? A multi-tracer study along the Elbe River

Julia Zill, Axel Suckow, Ulf Mallast, Jürgen Sültenfuß, Axel Schmidt, and Christian Siebert

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Short summary
Groundwater in agricultural regions can transport nutrients and contaminants into rivers, affecting water quality. This study examines nutrient flux in the German Elbe River using multi-environmental tracers. Groundwater takes a few decades to reach the river, mostly infiltrating after 1985. This means that massive nutrient inputs from past fertilization have peaked and will decline in the future. These findings guide management strategies to reduce eutrophication and protect aquatic ecosystems.
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