The Floating of Timber and the Changes in the River Landscapes of the French Mountains - The fluvial landscapes of mountain rivers and of rivers flowing out of ancient massifs such as the Morvan have undergone a long transformation since the Middle Ages owing to the necessity of floating timber to towns and naval dockyards. Evidence collected from modern documents suggests the possibility of reconstituting the works which have affected the geometry of riverbeds and of the hydrology of rivers above their basins. This research is particularly significant today as it may help in the restoration of damaged waterways.Le paysage fluvial des rivières montagnardes et de rivières issues de massifs anciens comme le Morvan a subi une longue transforma...