抄録
Since there is little influence on natural environment and flood regulation function is high, many dry dams have been planned in recent years. However, the characteristic of sediment transport in a dry dam is not sufficiently understood. The purpose of this research is to obtain the basic data for conducting hydraulic model experiments and grasping the sediment transport characteristics of a dry dam. As a result of the experiments, a sediment is flushed from the dam at the early rising stage and falling stage, and it was shown that the particle size distribution changes in time. Moreover, it was suggested that the flushing mechanisms of sediment from the dam differ in an early rising stage and falling stage. It becomes clear that a meandering talweg is formed at the just upstream of the dam. It is considered that this talweg has an important function for the sediment transport.
