%0 Journal Article
%A WEI   Li
%A LU  Jin-You
%A XU  Hai-Tao
%T Characteristics and Formation Conditions of Discontinuous Widely Graded Sediment in Natural  River Course
%D 2012
%R 10.3969/j.issn.1001-5485.2012.10.002
%J Journal of Yangtze River Scientific Research Institute
%P 6-10
%V 29
%N 10
%X With three typical natural river courses in China as case study, we preliminarily discussed the characteristics and formation conditions of discontinuous widely-graded sediment,  providing basis for researching discontinuous widely-graded bed load transport. It's believed that the characteristics of discontinuous widely-graded sediment are as follows: the sediment particle size varies in a wide range; sediment of a certain size is in a small amount or even in absence; and the weight percent of bed sediment exhibits a clear bimodal distribution. The formation of discontinuous widely-graded sediment is based on three conditions: non-uniform bed sediments and thick riverbed cover, sediment supplies from the upstream, and varying flow velocity in the river course.
%U http://ckyyb.crsri.cn/EN/10.3969/j.issn.1001-5485.2012.10.002