Article Dans Une Revue Hydrological Processes Année : 2021

Ardières‐Morcille in the Beaujolais, France: A research catchment dedicated to study of the transport and impacts of diffuse agricultural pollution in rivers

Lucie Liger
  • Fonction : Auteur
Samira Ahrouch
  • Fonction : Auteur
Chloé Bonnineau
Nadia Carluer
Arnaud Chaumot
Marina Coquery
Aymeric Dabrin
Christelle Margoum
Stéphane Pesce

Résumé

The 8-km(2) Morcille catchment, which is a sub-catchment of the 150-km(2) Ardieres catchment in the Beaujolais region of France, is one of the first sites in Europe where research has been conducted on surface water contamination by pesticides. A consolidated hydrological and chemical dataset has been set up with data collected since 2002 on the Morcille River and since 2011 on the Ardieres River. Additional data on the ecotoxicological and ecological impacts of pesticides on aquatic microbial communities and macroinvertebrates has also been recorded in both rivers since 2005. The 'Site Atelier Ardieres-Morcille Dataset' described here combines rainfall and stream water height measurements at gauged stations with concentrations of two trace elements and nine pesticides (mainly herbicides, fungicides and some of their metabolites) in both the Ardieres and Morcille rivers. All contaminant concentration data showed spatial and temporal variability in water quality associated with pesticide use and rainfall patterns. This long-term monitoring framework made it possible to estimate the persistence of two herbicides (diuron and norflurazon) after legislation banning them. It took 4 years for diuron and more than 10 years for norflurazon concentrations to fall below 0.1 mu g/L. Concurrent biological data showed a gradient of impacts consistent with chemical anthropogenic pressure, and rapid recovery of phototrophic microbial communities after the diuron ban. Finally, monitoring data on pesticide transport in a grassed strip set on a slope of the Morcille catchment confirmed that vegetative filter strips can effectively reduce diuron fluxes in surface runoff (>80% abatement) and infiltration water (>70% abatement). The full dataset offers a valuable resource for the validation of hydrological models and the development of global approaches to better understand the pressure-transport-exposure-impact chain and aquatic community resilience at the small catchment scale.

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Dates et versions

hal-03466902 , version 1 (06-12-2021)

Identifiants

Citer

Véronique Gouy, Lucie Liger, Samira Ahrouch, Chloé Bonnineau, Nadia Carluer, et al.. Ardières‐Morcille in the Beaujolais, France: A research catchment dedicated to study of the transport and impacts of diffuse agricultural pollution in rivers. Hydrological Processes, 2021, 35 (10), pp.e14384. ⟨10.1002/hyp.14384⟩. ⟨hal-03466902⟩
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