Abstract
A numerical model is proposed to investigate the characteristics of fiite amplitude bed topography in straight and meandering channel. The model is verified using a series of movable bed experiments performed in a wide range of geometric and hydraulic condition. The effects of geometric and hydraulic factors for finite amplitude bed topography in meandering and straight channels are investigated using the proposed numerical model by controlling the geometric and hydraulic parameters indivisually. By the results of the numerical experiment, a series of figures are presented, which show the effects of each parameter to the finite amplitude bed topography. Some interesting phenomena, including the interaction of free and forced bars, are discussed.
