抄録
Seepage erosion has been hypothesized as one of the dominant factors of channelization in both sediment and rock. However, the actual erosion mechanism responsible for seepage erosion is not fully understood. Recently, the importance of seepage erosion in rock is widely discussed. As a reason, this study aims to fulfill a lack of the fundamental knowledge in the seepage erosion mechanism. A series of the experiments on seepage erosion in wide chamber is conducted with varying sediment layer thickness, chamber slope and discharge. Artificial plastic pellets are used as cohesionless sediment. Channelization is found to be strongly influenced by water discharge. Amphitheater head of channels are observed in every experiment. The effects of chamber slope and sediment layer thickness result in different characteristics of channelization.
