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假设泥石流中的粗颗粒（如石块等）以跳跃的方式前进，通过分析单个颗粒在定常充分发展的流场中的运动，给出了单一起跳速度下以及具有一定分布的起跳速度下，颗粒数密度随高度的分布，并给出了起跳粒径有分布时颗粒的平均粒径随高度的分布，定性地解释了泥石流中的反粒径分布现象。
Assuming that the coarse particles (such as rocks) in the debris flow advance in a hopping manner, by analyzing the motion of a single particle in the steady and well-developed flow field, it is shown that under a single take-off speed and with a certain distribution of take-off speed, The distribution of population density with height, and the distribution of the average diameter of the particles with the distribution of the take-off size are given. The distribution of the antiparticle size in the debris flow is qualitatively explained.