Geosciences Rennes is a joint research unit of CNRS and Rennes 1 University. It develops its research activities in the field of current and long-term interactions between hydrosphere, geosphere, and biosphere. It contributes to the Rennes OSUR observatory, which recently purchased a state of the art dual-wavelength airborne Lidar for combined topographic/bathymetric data acquisitions. In the PICS project, the team brings its skills in Lidar data acquisition and processing, as well as in 2D hydrodynamic modelling and morphodynamic modelling of rivers (i.e. the Floodos model).