Ocean Systems Engineering

  • 제12권4호
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  • Pages.403-411
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  • 2022
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  • 2093-6702(pISSN)
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  • 2093-677X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Monsoonal sediment transport along the subaqueous Mekong Delta: An analysis of surface sediment grain-size changes

  • Thanh C., Nguyen (University of Science, Ho Chi Minh City) ;
  • An T., Dang (University of Science, Ho Chi Minh City) ;
  • Khuong N.T., Tran (University of Science, Ho Chi Minh City)
  • 투고 : 2022.06.05
  • 심사 : 2022.11.28
  • 발행 : 2022.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Annually, about 48-60% of sediment discharge of the Mekong River is delivered near the mouths of the Mekong River branches which is mostly coinciding with the southwest (SW) monsoon. This sediment budget in turn will be southwestwardly transported along the coast of the Mekong Delta (MD) during the northeast (NE) monsoon. Analysis of monsoonal changes in grain-size distribution (GSD) of surface sediment contributes to a better understanding of erosion and deposition processes along the MD. This study aims to figure out changes in GSD and sediment textures along the MD between SW and NE monsoons based on 183 surficial sediment samples collected along the MD during two field surveys carried-out in October 2016 and February-March 2017. Compared to the GSD during the SW and NE monsoon, the GSD along the MD changed significantly, especially in the estuary areas and along the coast of Bac Lieu and Ganh Hao. Whereas, in the west coast of the MD, GSD seem no changes between the two seasons. These changes in seabed sediment suggest that sediment with grain-sizes ranging from silt to fine sand can be transported during only a NE season.

키워드

과제정보

This research is funded by Vietnam National University Ho Chi Minh City (VNU-HCM) under grant number C-2020-18-01 project entitled "Hydrodynamics processes driving the sediment transport along the coast of the Mekong Delta". In addition, we wish to express our sincere thanks to the anonymous reviewers for their helpful comments, which helped us to improve this draft.

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