Mechanism of Phase Lag Between Current Speed and Suspended Sediment: Combined Effect of Erosion, Deposition, and Advection

doi:10.1007/s11802-019-3553-y

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海岛海岸带研究中心

	Mechanism of Phase Lag Between Current Speed and Suspended Sediment: Combined Effect of Erosion, Deposition, and Advection
	Zhu, Zichen; Wang, Yongzhi; Hu, Zejian; Bian, Shuhua; Zhang, Yongqiang; Xiong, Congbo
刊名	JOURNAL OF OCEAN UNIVERSITY OF CHINA
	2019-02
卷号	18 期号:1 页码:43-56
关键词	phase lag sediment transport critical shear stress suspended sediment
ISSN号	1672-5182
DOI	10.1007/s11802-019-3553-y
英文摘要	To retrieve and explain the phase lag between current speed and suspended sediment concentration (SSC), erosion, deposition, and advection were isolated as primary processes of sediment movement in a three-dimensional model. The response time was proved to be one of the reasons for the phase lag, as time is needed for suspension to diffuse from bottom to surface. A fitted Shields diagram was introduced into the model to reflect the relationship between SSC and shear stress, between shear stress and critical shear stress, as well as between SSC and critical shear stress for erosion. It takes some time for shear stress to increase to the critical value after high or low tide, and this was proved to be an important contributor to the phase lag. Overall, the variation of vertically integrated SSC is influenced by erosion mass flux, deposition mass flux, and advection flux. The phase pattern of erosion mass flux is consistent with the pattern of current if there was no wave action. However, phase difference is produced by the influence of deposition mass flux and advection. In this study, SSC peak/trough mostly occurred near the moment erosion mass flux approximately equaled deposition mass flux and would be impacted by advection. The time required for instantaneous variation of suspension to get to 0 after current peak/trough represents the phase lag between current speed and SSC.
资助项目	National Natural Science Foundations of China[41276084] ; National Natural Science Foundations of China[41406100]
WOS研究方向	Oceanography
语种	英语
出版者	OCEAN UNIV CHINA
WOS记录号	WOS:000455483900005
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/10941]
专题	业务部门_海岛海岸带研究中心
通讯作者	Wang, Yongzhi
作者单位	Minist Nat Resources, Inst Oceanog 1, Qingdao 266061, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Zichen,Wang, Yongzhi,Hu, Zejian,et al. Mechanism of Phase Lag Between Current Speed and Suspended Sediment: Combined Effect of Erosion, Deposition, and Advection[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2019,18(1):43-56.
APA	Zhu, Zichen,Wang, Yongzhi,Hu, Zejian,Bian, Shuhua,Zhang, Yongqiang,&Xiong, Congbo.(2019).Mechanism of Phase Lag Between Current Speed and Suspended Sediment: Combined Effect of Erosion, Deposition, and Advection.JOURNAL OF OCEAN UNIVERSITY OF CHINA,18(1),43-56.
MLA	Zhu, Zichen,et al."Mechanism of Phase Lag Between Current Speed and Suspended Sediment: Combined Effect of Erosion, Deposition, and Advection".JOURNAL OF OCEAN UNIVERSITY OF CHINA 18.1(2019):43-56.