Tide-induced bedload transport pathways in a multiple-sand-ridge system offshore of Hainan Island in the Beibu Gulf, northwest South China Sea

doi:10.1002/esp.4428

IOCAS-IR > 海洋地质与环境重点实验室

	Tide-induced bedload transport pathways in a multiple-sand-ridge system offshore of Hainan Island in the Beibu Gulf, northwest South China Sea
	Ma, Xiaochuan 1,2; Li, Jinyuan 3,4,5; Yan, Jun 1,2
	2018-10-01
发表期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
卷号	43 期号:13 页码:2738-2753
通讯作者	Ma, Xiaochuan(mxch@qdio.ac.cn)
摘要	Modern sand transport pathways in a multiple-sand-ridge system are elusive and have rarely been studied in recent years. We report herein a field with four en echelon linear sand ridges offshore of Hainan Island in the Beibu Gulf and describe the distribution and morphology of these sand ridges in detail for the first time. Dune crest comparisons and seismic profiles are also interpreted to assess sand transport over the dunes. Based on a Delft 3D model, regional tidal currents and tide-induced bedload transport in the multiple-sand-ridge system were simulated to provide insights into the related bedload transport paths. The results show that bedload transport and residual flows are mostly directed to the south on the east side of the sand ridges and to the north on the west side, and these differences coincide with dune asymmetries and migrations. Cross-ridge transport is weak and mostly converges on the crests of sand ridges from the two flanks. The bedload transport is unbalanced on either flank of the sand ridges, thus leading to the asymmetry and crest kinks of the sand ridges. A distinct correlation is not observed between the net cross-ridge sand transport and sand ridge asymmetry. In this system, cross-swale transport is significant between the neighboring sand ridges and helps construct the bedload transport circulation in the swales. Sand accretion also occurs in the swales and benefits from the southwestward bedload transport from the north end of sand ridge 3. Distinct evidence has not been found for closed bedload transport circulation around sand ridges in this multiple-sand-ridge system, although limited clockwise current vortices develop on several sand ridges. Additional field observations and simulations are required to characterize the suspended load transport in a multiple-sand-ridge system, and the effects of local sand supply conditions on sand transport also need further evaluation. Copyright (c) 2018 John Wiley & Sons, Ltd.
关键词	bedload transport sand ridge dune Delft 3D model Beibu Gulf
DOI	10.1002/esp.4428
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41406061] ; National Programme on Global Change and Air-Sea Interaction[GASI-GEOGE-02] ; National Natural Science Foundation of China[41406061] ; National Programme on Global Change and Air-Sea Interaction[GASI-GEOGE-02]
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000446558900005
出版者	WILEY
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/160453
专题	海洋地质与环境重点实验室
通讯作者	Ma, Xiaochuan
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China 3.China Univ Geosci Beijing, Sch Ocean Sci, Beijing, Peoples R China 4.Guodian New Energy Technol Res Inst, Marine Geol & Hydrol Res Lab, Beijing, Peoples R China 5.Zhong Neng Power Tech Dev Co Ltd, Beijing, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Ma, Xiaochuan,Li, Jinyuan,Yan, Jun. Tide-induced bedload transport pathways in a multiple-sand-ridge system offshore of Hainan Island in the Beibu Gulf, northwest South China Sea[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2018,43(13):2738-2753.
APA	Ma, Xiaochuan,Li, Jinyuan,&Yan, Jun.(2018).Tide-induced bedload transport pathways in a multiple-sand-ridge system offshore of Hainan Island in the Beibu Gulf, northwest South China Sea.EARTH SURFACE PROCESSES AND LANDFORMS,43(13),2738-2753.
MLA	Ma, Xiaochuan,et al."Tide-induced bedload transport pathways in a multiple-sand-ridge system offshore of Hainan Island in the Beibu Gulf, northwest South China Sea".EARTH SURFACE PROCESSES AND LANDFORMS 43.13(2018):2738-2753.

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