The results show that statistical self-similarity ofgrain-size distribution exists in each kind ofsediment, but the fractal dimensions are different for different kinds of sediments.
结果表明：各类型沉积物都具有良好的统计自相似性，并且各自有着不同的分维值。
2
Entrainment mechanism ofsediment with mixed grain sizes is different from that of uniform grain size.
混合粒径条件下沉积物的起动机理不同于均匀粒径条件下沉积物的起动机理。
3
By analysis of sand grainsize in sediment microenvironment of modern rivers, the size and shape of grain and surface texture feature of quartz grain were described in this paper.