Author(s): MENG Zhen, YANG Wenjun, State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Key Laboratory of Management of Rivers and Lakes & flood control of Ministry of Water Resources, Yangtze River Scientific Research Institute
Pages: 117-129
Year: 2015 Issue:  10
Journal: Journal of Hydroelectric Engineering
Keyword:  angle of repose; angle of friction; heap method; tilt method; drum rotation method; nonuniform sediment;
Abstract: A clarification of several concepts is presented: the angle of repose, natural slope, surface friction angle, internal friction angle, and contact friction angle of sediment particles. This is based on a review of typical experimental methods for determining the angle of repose and its major influencing factors, along with the factors of the angle of surface friction. We present a discussion on the effects of sorting coefficient η, kurtosis coefficient K and skewness coefficient S on the angle of repose of nonuniform sediment, derive a relationship of the angle of surface friction versus the relative hidden degree of sediment particles from the concept of sediment incipient motion, and analyze the difference between the angle of repose for particles under the flows and the dynamic angle of repose. Finally, we suggest some ideas about the experimental tests and applications related to non-uniform sediment.