CONTROL OF SEDIMENT DISCHARGE BY SABO DAM

Abstract

Sabo dam is commonly used for preventing the sediment disaster by storing the harmfulsediment discharge. Even after the sediment storage capacity of the dam has been filledup, the dam has a sediment control function by reducing the peak sediment discharge dueto the temporal sedimentation during flood. The sediment capacity can be restored to someextent by the erosion after flood.In this paper, the authors investigated the sediment control function experimentally andtheoretically, and proposed a simulation technique to calculate the sediment control. Thetheoretical results show the good agreement with the experimental ones. By the simulationtechnique, the authors clarified that the contraction in width by dam results in much increaseof the sediment control function.Sabo dam is commonly used for preventing the sediment disaster by storing the harmfulsediment discharge. Even after the sediment storage capacity of the dam has been filledup, the dam has a sediment control function by reducing the peak sediment discharge dueto the temporal sedimentation during flood. The sediment capacity can be restored to someextent by the erosion after flood.In this paper, the authors investigated the sediment control function experimentally andtheoretically, and proposed a simulation technique to calculate the sediment control. Thetheoretical results show the good agreement with the experimental ones. By the simulationtechnique, the authors clarified that the contraction in width by dam results in much increaseof the sediment control function