Abstract
A two-dimensional numerical model, in which the curvature of stream line is taken into account to evaluate the intensity of secondary flow, is proposed. The advantage of this model is that it is possible to calculate bed variation even if movable bed is locally dry caused by evolution of bar. This model is applied to the prediction of bed variation in a meandering channel. The results agree well with the measurements. Furthermore, as a result of double fourier analysis it is found that the results have almost the same feature of bed configuration as measurements have.
