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Impact environnemental de la diffusion de produits phytosanitaires par ruissellement. : Deux exemples contrastés en Europe et en Afrique

Abstract : Modern agriculture is based on the increasing use of pesticides. Environmental contamination by pesticides as well as the health impacts are now proven. The transfer of these products into surface waters or groundwater could lead to exposure of the general population living near agricultural areas. The study aims to provide a useful methodology to characterize the pollution risk resulting from the direct application of plant protection products and their transfer by runoff within a watershed. This methodology is tested on two areas where intense rainfall are causing major runoff, one in Languedoc-Roussillon ( France) and the other in the extreme north of Cameroon. The first step is to quantify the pest pressure within the municipalities in the studied areas with the Treatment Frequency Index (IFT). Then in a second time a hydrological analysis, based on the adaptation of the cartographic method IRIP (Indicator of the flood hazard by Intense Pluvial runoff), allows a characterization of areas suitable for the production or accumulation of runoff. Finally, the use of a Geographic Information System (GIS) allows, by matching the IFT and the streaming areas to define different levels of pollution hazard within the watershed. This study should refine the definition of human exposure in epidemiological analyzes in the general population. However, the lack of consideration of the air and underground propagation of these products is one of its major limitations. Finally, it could be supplemented by the inclusion of underground water transfers to better assess the pollution in the river system.
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https://halshs.archives-ouvertes.fr/halshs-01719310
Contributor : Teddy Auly <>
Submitted on : Wednesday, February 28, 2018 - 10:52:49 AM
Last modification on : Tuesday, April 21, 2020 - 2:05:40 AM

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  • HAL Id : halshs-01719310, version 1

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Emmanuelle Cadot, Valérie Borrell Estupina, Marine Rousseau, David Sebag. Impact environnemental de la diffusion de produits phytosanitaires par ruissellement. : Deux exemples contrastés en Europe et en Afrique. Dynamiques Environnementales - Journal international des géosciences et de l’environnement, Presses universitaires de Bordeaux, 2016, Environnement et Santé : où en est la géographie ?, pp.182-197. ⟨halshs-01719310⟩

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