Methods comparison for detecting trends in herbicide monitoring time-series in streams

Chow, Reynold; Spycher, Simon; Scheidegger, Ruth; Doppler, Tobias; Dietzel, Anne; Fenicia, Fabrizio; Stamm, Christian

doi:10.1016/j.scitotenv.2023.164226

Cited by 4 publications

(1 citation statement)

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“…Due to the high interannual variation, trend detection remains a particular challenge and in many cases is based on the discontinued use of a.s. which are not approved anymore (Chow et al 2020 , 2023 ). It is therefore understandable that in the context of the sustainable use directive (SUD), apart from NL, SE, and CH, progress is mainly determined with calculated indicators.…”

Section: Discussion—comparison Of Chemical Monitoring Programsmentioning

confidence: 99%

Linking chemical surface water monitoring and pesticide regulation in selected European countries

Spycher,

Kalf,

Lahr

et al. 2024

Environ Sci Pollut Res

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The progress in chemical analytics and understanding of pesticide dynamics in surface waters allows establishing robust data on compounds with frequent exceedances of quality standards. The current chemical, temporal, and spatial coverage of the pesticide monitoring campaigns differs strongly between European countries. A questionnaire revealed differences in monitoring strategies in seven selected European countries; Nordic countries prioritize temporal coverage, while others focus on spatial coverage. Chemical coverage has increased, especially for non-polar classes like synthetic pyrethroids. Sweden combines monitoring data with agricultural practices for derived quantities, while the Netherlands emphasizes spatial coverage to trace contamination sources. None of the EU member states currently has established a process for linking chemical surface water monitoring data with regulatory risk assessment, while Switzerland has recently established a legally defined feedback loop. Due to their design and objectives, most strategies do not capture concentration peaks, especially 2-week composite samples, but also grab samples. Nevertheless, for substances that appear problematic in many data sets, the need for action is evident even without harmonization of monitoring programs. Harmonization would be beneficial, however, for cross-national assessment including risk reduction measures.

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Section: Discussion—comparison Of Chemical Monitoring Programsmentioning

confidence: 99%