Relative Transportability for Non-uniform Bed Load Sediment Transport

2018 2nd International Workshop on Renewable Energy and Development

能源学;经济学

Zhijing, Li^1,2 ; Dazhi, Li^1 ; Xiaobin, Liu^1,2 ; Zhongwu, Jin^1,2 ; Dasong, Chen^3

Changjiang River Scientific Research Institute, Wuhan

430010, China^1

Collaborative Innovation Center for Geo-Hazards and Eco-Environment in Three Gorges Area, Hubei Province, Yichang

443002, China^2

Guizhou Survey and Design Research Institute for Water Resources and Hydropower, Guizhou Province, Guiyang

550002, China^3

关键词: Bed load;    Clear water scour;    Flow strength;    Non-uniform;    Sand fraction;    Transport rate;    Water discharges;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/153/4/042006/pdf
DOI  :  10.1088/1755-1315/153/4/042006

来源: IOP

【 摘 要 】

Clear water scour experiments with a wide range of water discharge were conducted on uniform and non-uniform beds. The fractional transportability in non-uniform runs is compared with that of the same fraction in uniform runs. It is found that in non-uniform runs, the fractional transportability of gravel is greatly promoted compared with that in uniform runs by the same proportion, while the transportability of sand fraction is obviously inhibited. Furthermore, although the transport rate of sand is undoubtedly much greater than that of gravel under the same flow strength in uniform runs, the transport rates of sand fraction and gravel fraction are found to be nearly the same in non-uniform runs.