Christophe Ancey is a doctor of engineering with degrees from the École Centrale de Paris and the École Nationale Supérieure d'Hydraulique et de Mécanique de Grenoble. He completed his thesis on the rheology of granular flows under the supervision of Pierre Evesque and Philippe Coussot from 1994 to 1997: he worked from 1998 to 2003 as a research fellow (rheology) at Cemagref within the "erosion protection" team, which has since become the « Erosion Torrentielle, Neige et Avalanches » laboratory at IRSTEA. Since 2003, he has been professor of fluid mechanics at EPFL and heads the Laboratoire d'Hydraulique Environnement. He conducts research on granular suspension flows and particle transport. In parallel, he created with Claude Charlier and Vincent Bain a consulting structure (Toraval) for paravalanche engineering and torrential hydraulics, which offered him a vast field of applications to his theoretical developments. Finally, he is associate editor for Water Resources Research and Journal of Geophysical Research: Earth Surface, two flagship journals in the field of water sciences.