抄録
These days, 2-dimentional numerical simulation of changing bed elevation would be useful for river management. However, it is difficult to predict sediment transport at the bed including the complex surface and the substrate structure in the river. There are still some problems to be solved in estimating flow resistance considering both bed surface and vertical condition, and it lead to difficulty to estimate sediment transport. Therefore, a series of flume experiments were conducted in order to examine flow resistance and velocity distribution near bed surface. These experiments indicated the importance of both surface and substrate structure of river bed for prediction of sediment transport.
