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, Xiaochuan1,2; Li, Jinyuan3,4,5; Yan, Jun1,2
2018-10-01
Source PublicationEARTH SURFACE PROCESSES AND LANDFORMS
ISSN0197-9337
Volume43Issue:13Pages:2738-2753
Corresponding AuthorMa, Xiaochuan(mxch@qdio.ac.cn)
AbstractModern 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.
Keywordbedload transport sand ridge dune Delft 3D model Beibu Gulf
DOI10.1002/esp.4428
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41406061] ; National Programme on Global Change and Air-Sea Interaction[GASI-GEOGE-02]
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000446558900005
PublisherWILEY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/160453
Collection海洋地质与环境重点实验室
Corresponding AuthorMa, Xiaochuan
Affiliation1.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
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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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