Forestation on floodplain is now a world-wide issue from a river engineering viewpoint. Based on a field data analysis of river morphology, discharge and land cover in the last decades, a main cause of floodplain forestation was found to be decreased frequency of floodplain inundation after sequent channel restoration works. In order to perform an adaptive river management, a uniform flow analysis of vegetated channel is carried out for several cross sections from middle to downstream. It is investigated how floodplain excavation and thinning of tree vegetation modify flow structure and tree destruction during flood events. It is discussed based on the analysis what is a proper management strategy in order to create a safe and attractive river environment.
