Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 5
Articles | Volume 30, issue 5
https://doi.org/10.5194/hess-30-1291-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-1291-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 5
Research article
 | 
04 Mar 2026
Research article |  | 04 Mar 2026

How does integrating multi-scale monitoring and compound-specific isotope analysis improve the evaluation of S-metolachlor degradation in agro-ecosystems?

Boris Droz, Guillaume Drouin, Jenna Lohmann, Benoit Guyot, Gwenaël Imfeld, and Sylvain Payraudeau

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Short summary
How to evaluate pesticide persistence and degradation across an agricultural catchment to improve strategies for preserving aquatic ecosystems? By using a tracing method based on stable isotope signatures of pesticides at the catchment scale, degradation of the herbicide S-metolachlor could be distinguished from other dissipation processes. A limited number of isotopic measurements can provide critical insights for designing efficient strategies to protect aquatic ecosystems.
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