Abstract: It is observed the gravel river sediment discharge with existing empirical regime relationships. The aim of the research is to give a mathematical model about the stable cross-section geometry and to determine a model for the stable slope of an alluvial channel which is in nature seldom stable. In an alluvial channel to reach an equilibrium condition, it changes its plane geometry until to have a stable condition in plane configuration. There... More

Abstract: Meander flow takes place in one single channel which oscillates more or less regularly with amplitudes that tend to increase with time. Meanders are found in beds of fine sediments with gentle slopes. In this study, effort will be made to investigate meanders’ turbulent boundary layer and to improve the present knowledge about the river meandering phenomena. It is assumed that the development of the perturbations which develop into meanders or... More

Abstract: The movement of particles on the river boundary layer is a complex phenomena which can be never solved by a deterministic approach. The unsteady non uniform conditions in flow boundary layer show the result of water surface and bed stream changing with time and location of particles. To determine the movement of boundary layer particles other new theories about stochastic processes using the theory of probability and statistics in river alluvial... More

Abstract: In the studies of open-channel flow with suspended sediments, used a constant of Von Karman κ in a model for velocity profile. The augmentation parameters have been added by various researchers in more recent development of the boundary-layer theory of meander development. In this research new parameters will be included because of the existence of the turbulent flow region in meandering channels because of boundary-layer theory. More

Abstract: If the sediment transport behaves as bed-load, the sediment surface at meandering channel will deform into transverse waves.This investigation is a new model for prediction of river-meander models in nature.The aim of this research is to give a precise method whose bed forms can have a variety of scales ranging from ripples through small dunes to fully developed dunes or sandwaves.Its mathematical model will be investigated. More