Abstract
In spite of the importance of knowing sediment transport near a river mouth, it has not been well studied because of the complexity of exerting forces and topography. This study has developed an analytical model to reproduce large cuspate topography which has been often observed at the Abukuma River mouth.
The velocity field of river flow is evaluated by the two dimensional jet model and the longshore current field by Longuet-Higgins's model. Along stream lines for the superimposed field of the two flows, the continuity equation of sediment is solved. Computational results for several river and wave conditions show that high river discharge is especially effective to form large cuspate topography. Keywords: sediment transport, river flow, longshore current, computation
