EXPERIMENTAL STUDY ON CONCENTRATION OF SUSPENDED SEDIMENT UNDER HIGH VELOCITY CONDITIONS CAUSED BY TSUNAMI

Abstract

 In this study, in order to improve the movable bed model for tsunamis, the concentration data of suspended sediment under high flow velocity conditions of simulated tsunami was obtained by sediment transport experiments, and the relationship between the equilibrium concentration of suspended sediment and the hydraulic quantities was clarified. In adition, the sediment transport experiments were were reproduced by using the movable bed model for tsunamis with the equation of saturation concentration of suspended sediment. As a result, the equation of saturation concentration of suspended sediment fell within the distribution range of the equilibrium concentration of suspended sediment, and the validity of the equation of saturation concentration of suspended sediment was confirmed by direct comparison with the experimental results. The movable bed model for tsunami with the equation of saturation concentration of suspended sediment reproduced the experimental results of suspended sediment concentration and topography change well.