ABSTRACT
Movable bed experiments using a wide laboratory flume without influence of fixed side walls were carried out in this study. The purpose of this study is to observe the process of river channel plane formation caused by bank erosion along a watercourse in the experiments. The shape of a channel plane changes with bank erosion or formation of braided streams and sandbars in the channel. The stages through which a straight channel, initially built on an erodible bank, develops into a node and anti-node plane were observed in this experiment.
