| Sedimentation is one of the important problems of a reservoir. In recent years, for the purpose of recovering river environment and solving sedimentation problem, the number of trials to place the sediment to the downstream river has been increasing in Japan. To make appropriate sediment supply plan in consideration of river environment, it is required to develop a prediction method to estimate erosion process. In this paper, the numerical simulation of flow and bed deformation under the field observed conditions was carried out to verify the applicability of numerical models to erosion phenomena of placed sediment. In order to simulate the placed sediment erosion, bed load and suspended load sediment transport and bank erosion were taken in account for modeling. As a result of comparison between observation and calculation, it was indicated that the model could reproduce the erosion process of the placed sediment and estimate the eroded volume quantitatively. |
