Method for identifying areas predisposed to particulate emissions and transfers. Application to an area of intensive cattle breeding in the South Channel bocage

Abstract

In the Aquae research program, a project examines the effects of watershed management systems on particles and dissolved element transfers, and on water quality in a breeding area. We looked for the explanations about the particle growth emissions and transfers toward two small streams which are tributaries of the Oir. Little by little, ploughland is spreading at the expense of grassland, the "Bocage" landscape structure is disappearing : consequently, soil erosion phenomena are becoming harsher and riverbank fragility is increasing. We have first processed the different informations from ground and cartography with a GIS. Afterwards, we have analysed the sensitivity of zones to particle transfers by carrying out a multi-criteria evaluation with the ELECTRE method.