Abstract

Using of parameters of trajectories and literary facts according to characteristics of saltation motion of particles allowed receiving dependence for mean and maximum points of relative height and length of particle’s salts and for their relative velocity of longitudinal. Data of I. Francis, N.N. Grishin, N.A. Mikhailova and others authors were used. Experiments of Mikhailova^, were done with sand particles. Dependence for non-dimensional ratio for height of salts was used in Rossinsky model. The verification of a law of density distribution of height of bounds showed the best coincidence with Raleigh law. The calculation results of the motion of particles were used for determination and simplification of stochastic model of bed-load transport by K.I. Rossinsky. In expression for bed-load transport appeared a difference a probability of estrange of solid bed load beginning of movement and a probability of suspension solid grains. A probability of estrange of particles from the bed is defined by supposition that allocations of longitudinal velocities of fluid in the area near the bed submit to the normal law. The result of calculation of solid expenditure has good consent with measurement in laboratory and river