掃流砂の停止機構に関する研究
1988 年 1988 巻 399 号 p. 105-112
詳細
1988 年 1988 巻 399 号 p. 105-112
Each of the particles transported as bed-load will rest on the bed after a certain passage, mostly due to being held up with the unevenness of bed surface particles and rarely to die-out of reflection energy during the impingement of the particle on the bed. In order to investigate the mechanism of this process, the uneven arrangement of bed particles are simulated stochastically, based on the observation by a video analysis, and a simulation model of bed-load movement is constructed. The validity of this model is verified by experimental data, and as a result, the characteristics of this process, that is Step-length and Moving-period, are clarified and the equation for estimation of these values can be developed as a function of dimensionless tractive force u/w0. It is confirmed that the estimated values by these expressions agree well with the experimental values obtained by several researchers.
