水力发电学报2017，Vol.36Issue(4)：58-70,13.DOI:10.11660/slfdxb.20170407
清水冲刷下非均匀卵石床面粗化过程及分选模式
Sorting of non-uniform bedload in clear water scouring
摘要
Abstract
Generally,rolling is the primary form ofbedload movement on pebble riverbeds under certain flow conditions.Due to different moving distances of the particles with different sizes on a bed surface,sorted sediment transport will occur,forming a stable structure with coarse particles as the main body of the bed.This work focused on a study of the coarsening process of non-uniform pebble beds during clear water scouring and the sorting modes that were stably formed after scouring.Based on a rolling mechanics model,tracking of the rolling particle movement under different conditions was numerically calculated;a gradation calculation model of stable non-uniform pebble beds washed by clear water was developed.This model was used in a practical example to calculate variations in bedload gradation and gradation curves at different time for different river sections.The theoretical results presented in this paper are applicable to rolling movement of pebbles and provide a theoretical method for further studies of pebble bed sorting.关键词
泥沙运动/清水冲刷/非均匀/卵石/滚动/分选/粗化Key words
sediment movement/clear-water scour/non-uniform/bedload/rolling/sorting/gradation分类
建筑与水利引用本文复制引用
冀坷帆,徐海珏,白玉川..清水冲刷下非均匀卵石床面粗化过程及分选模式[J].水力发电学报,2017,36(4):58-70,13.基金项目
国家自然科学基金(41576093 （）
51279124) （）
