长江科学院院报2017，Vol.34Issue(7)：1-6,6.DOI:10.11988/ckyyb.20160343
山区河流卵石河床的推移质输沙特性
Characteristics of Bed-load Transport in Gravel Bedof Mountain Rivers
蔡炳云1
作者信息
- 1. 上海勘测设计研究院有限公司 四川分公司,成都 610000
- 折叠
摘要
Abstract
Surface layers of gravel bed of wide gradation are usually covered by armoring layer with different coarsening degrees.Most of the existing bed-load transport formulas could just reflect the characteristics of sediment transport in a certain coarsening degree, hence are of poor applicability.Theoretical analysis and experiment results show that bed-load transport rate decreases as the coarsening degree of armoring layer increases under the same incoming flow and sediment condition.Introducing the parameter of coarsening degree into the calculation could solve this problem.The stability of armoring layer plays an important role in bed-load transport in gravel bed.Bed-load transport rate increases sharply when the armoring layer is broken.The calculation results of the existing formulas are obviously small.Therefore, the sharp increase of sediment transport rate caused by the failure of armoring layer should be considered in calculating the bed-load transport rate.关键词
卵石河床/推移质输沙率/粗化程度/粗化层稳定性/临界条件Key words
gravel bed/bed-load transport rate/coarsening degree/stability of armoring layer/critical conditions分类
建筑与水利引用本文复制引用
蔡炳云..山区河流卵石河床的推移质输沙特性[J].长江科学院院报,2017,34(7):1-6,6.
