A trench study to assess transfer of pesticides in subsurface lateral flow for a soil with contrasting texture on a sloping vineyard in Beaujolais.

摘要: Subsurface lateral flow in both texture-contrast soils and catchments with shallow bedrock is suspected to be a non-point source of contamination watercourses by pesticides used agriculture. As case study, the north Beaujolais region (eastern France) provides favorable environment for such due its agro-pedo-climatic conditions. Environments seen include intense viticulture, permeable soils, steep hillslopes, storms that occur during periods pesticide application. Watercourse has been widely observed this region, offsite transport subsurface involved diffuse chronic presence surface water. In order confirm quantify potential role processes transfer, an automated trench system designed. The was set up on farmed hillslope soil. It equipped tipping bucket meter automatic sampler monitor concentrations at fine resolution, means flow-dependent sampling strategy. Four currently vine growing were studied provide range mobility properties: one insecticide (chlorpyrifos-methyl) three fungicides (spiroxamine, tebuconazole, dimethomorph). With system, it possible study concentration dynamics flow, generated substantial rainfall events following applications. experimental design ascertained suitable method which related transfer pesticides.