抄録
Debris flows are very dangerous phenomena in mountainous areas throughout the world. Debris flow causes damage of lives and properties. To prevent or mitigate debris flow disaster, various kinds of the Sabo dams have been constructed. Control function of such Sabo dams have been reported through a lot of studies. In recent studies, experimental and numerical works have been performed for definition of general design criteria of Sabo dams. Nevertheless, there are few studies discussing the arrangement of Sabo dams. The objective of this study is to improve the sediment capturing capacity by the arrangement of Sabo dam. The numerical simulations and experiments have been carried out to investigate the debris flow deposition volume of a series of Sabo dams. The constitutive equations of Takahashi1) et al. are used for debris flow deposition at upstream of a Sabo dam. Results indicate that a decrease in distance of between dams will increase equilibrium bed slope due to upper located Sabo dam.
