# Contribution à létude du devenir des produits phytosanitaires lors découlements dans les fossés : caractérisation physico-chimique et hydrodynamique

Abstract : The object of this research is to assess the role of drainage ditches in the transport of pesticides from agricultural fields to the main river network. Experiments have been made in natural ditches in order to get a better comprehension of the hydrochemical processes. By the means of laboratory standardised measurements, we evaluated the influence of compound properties, substratum nature or environmental conditions on pesticide sorption. An experimental channel has been build, and the results confirmed the behaviour of pesticides observed at field and laboratory scales. Finally, we managed to determine some hydrological and physicochemical factors that are implied in the retention of agrochemicals as they move through ditch systems. We have also developed an indicator, based on field investigations and laboratory measures, so as to approximate to the theoretical retention capacity of ditches.
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• HAL Id : tel-02583246, version 1
• IRSTEA : PUB00014519

### Citation

C. Margoum. Contribution à létude du devenir des produits phytosanitaires lors découlements dans les fossés : caractérisation physico-chimique et hydrodynamique. Sciences de l'environnement. Doctorat Environnement et Santé, université Joseph Fourier Grenoble I, 2003. Français. ⟨tel-02583246⟩

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