The mechanisms which control the formation and maintenance of pool–riffles are fundamental aspects of channel form and process. Most of the previous investigations on pool–riffle sequences have focused on alluvial rivers, and relatively few exist on the maintenance of these bedforms in boulder-bed channels. Here, we use a high-resolution two-dimensional flow model to investigate the interaction...

When investigating sediment transport in laboratory open-channel flows, it is often necessary to remove sidewall effects for computing effective bed shear stress. Previous sidewall correction methods include some assumptions that have not been completely verified, and therefore different values of the bed shear stress may be obtained, depending on the approach used in making sidewall correction...

Flow resistance in gravel-bed channels is not only affected by the shape and size of roughness elements, but also their arrangement on channel bed surface (position to flow streamlines, spacing between protrusion from bed). Many investigations proved that open can be obtained integrating power velocity profile. For a macro-scale condition, this study aims investigate effect different boulder ar...