Abstract: Two general dispersion models suitable for nonequilibrium bed-load transport were constructed. The first one, called the P model, is based on the probability of migration for specific groups of sediment particles. The ...

Abstract: A numerical model for simulation of temporal bed evolution in channel bends with fixed walls is constructed and verified with laboratory experiments. The model is based on governing equations of flow and sediment motion, ...

Abstract: Bed topography and transverse sediment sorting in an alluvial channel bend were investigated under unsteady-flow conditions with nonuniform sediment. Five experiments, each having the same initial sediment-size gradation ...

Abstract: In bed-load sediment transport, the lifting force plays an important role in reducing the friction between sediment particles and the bed surface, and it makes particle transportation by the shear force easier. Because the ...

Abstract: The temporal effect of hydrograph on local scour depth is investigated under clear-water scour condition. By analyzing the characteristics of scour-depth evolutions at bridge piers for different rising hydrographs, a ...

Abstract: Experiments of bridge pier scour are carried out under steady and unsteady clear-water scour conditions with uniform and nonuniform sediments. Around the pier nose, the sediment size variation of surface bed materials is ...