Author(s): Takahiro Itoh; Rabindra Osti; Shinji Egashira
Linked Author(s): Takahiro Itoh
Keywords: Debris Flow; Sediment Control; Debris Flow Control; Close Type Check Dam
Abstract: The paper discusses a criterion of control function for close type check dams. A flume test was conducted for investigating change of debris flow characteristics passing through a check dam as well as for validating a numerical method. Numerical computations are conducted to investigate the sediment control of the dam, specially focused on sediment volume supplied by debris flow. The numerical results suggest that relative outflow sediment volume can be evaluated by using two non-dimensional parameters which are newly introduced and specified in terms of a virtual storage volume of the check dam. The virtual storage volume is determined by initial bed slope, original bed slope and equilibrium bed slope corresponding to inflowing debris surge.
Year: 2004