Abstract
Stochastic simulation of bed-load particle is a useful means to estimate the probability density function of the moving period which plays an important role in non-equilibrium bed-load transport process along a temporal axis. First, the motion of a bed-load particle is simulated under various kinds of hydraulic conditions in oscillation-current coexisting flow. Secondly, the bed-load discharge is evaluated by integrating the non-equilibrium sediment transport formula, by using the result of the simulation. Finally, the formula of bed-load discharge within a half cycle of oscillation and that of a net rate of bed-load transport are proposed with particular reference to the effect of relative strength of current to oscillation.
