Un modèle d'érosion des torrents en crue (ETC)

La modelisation des phenomenes d'erosion et de transport solide dans les bassins versants est un objectif majeur de la recherche sur les risques resultant des crues torrentielles. Le modele ETC global, spatialisable et evenementiel, cherche a representer l'integralite des processus hydrologiques et erosifs des bassins versants torrentiels depuis la pluie jusqu'aux debits liquides et solides a l'exutoire. Sa conception est decrite et deux applications presentees. Son developpement en cours permettra sa diffusion aupres des ingenieurs charges de caracteriser et de prevenir les crues torrentielles, ou de definir des protections. / Modelling erosion and the transport of solids into catchment areas is a major objective of research into the dangers resulting from torrential flooding. The general spatial and event ETC model attempts to represent all hydrological and erosion processes in catchment areas subject to torrential flooding, from rainfall through to liquid and solid outflows. Its design and two applications are described. It is currently being developed to allow it to be distributed to engineers responsible for characterising and issuing flood warnings or to define protective measures.