Investigating the Change in River Bed Morphology under the Influence of Blockage – Physical Modelling in a Curved Laboratory Channel

River restoration and pro-ecological design are essential in modern hydrotechnical projects, yet guidelines for the design of sinuous channels with erodible beds under blockage conditions remain lacking.This study investigates the effects of blockagescaused by ice, debris or litteron sediment transport and river bed morphology.Experiments were conducted in a 2 m wide, 60 m long meandering channel with a sediment recirculation system.Velocity was measured using ADV and PTV and bathymetric data was collected using a FARO 3D scanner.The results show how blockages disrupt flow, increase turbulence, and intensify sediment transport, providing critical insights for designing resilient, ecologically functional river channels.