Floc size asymmetry modulated by tidal dynamics drives net landward sediment transport in a man-made tidal channel
文献类型：期刊论文
| 作者 | Li, Wenjian1,2; Lee, Guan-hong1; Chang, Jongwi1; Ajama, Ojudoo Darius1; Wang, Zhenyan2 |
| 刊名 | MARINE GEOLOGY
 |
| 出版日期 | 2025-10-01 |
| 卷号 | 488页码:16 |
| 关键词 | Tidal flat Floc size Shear velocity Tidal asymmetry Flocculation |
| ISSN号 | 0025-3227 |
| DOI | 10.1016/j.margeo.2025.107615 |
| 通讯作者 | Lee, Guan-hong(ghlee@inha.ac.kr) |
| 英文摘要 | In natural aquatic systems, flocculation affects sediment transport by altering particle size and settling velocity. However, the asymmetry in floc size over tidal cycles and its influence on sediment transport, especially in turbid coastal regions affected by human activities, remains understudied. This study uses comprehensive observations from ADV, HR-ADCP, Signature ADCP, LISST, and CTD within a man-made tidal channel located on the west coast of the Korean Peninsula to elucidate the size-dependent sediment transport process. Our findings reveal a tidal asymmetry in bottom shear velocity and particle size distribution (PSD). During ebb tide, the bottom shear velocity was higher, but suspended sediment concentration (SSC), Total Volume Concentration (TVC), and mean size (Mz) were lower compared to flood tide. This suggests that advection transport, in addition to resuspension, is a significant source of particles during flood tide. These particles increased SSC, TVC, and landward sediment flux, while low shear velocity facilitated flocculation, resulting in higher Mz. Consequently, a higher proportion of microflocs and macroflocs occurred, leading to a higher settling flux from flood tide to high slack water. In contrast, weaker advection transport and low SSC during ebb tide led to lower seaward sediment flux, with stronger shear velocity and lower concentration resulting in weak flocculation and lower Mz. During ebb tide, flocculi (10-20 mu m diameter) exceeded microflocs and macroflocs, causing a lesser settling flux. This tidal asymmetry in floc size explains the trapping of larger particles during flood tide and high water levels, ultimately leading to net landward sediment flux in the channel over tidal cycles. |
| WOS关键词 | SETTLING VELOCITY ; SUSPENDED SEDIMENT ; PARTICLE-SIZE ; SHEAR-STRESS ; FLOCCULATION ; ESTUARY ; TURBULENCE ; MATTER ; FLATS ; MODEL |
| 资助项目 | National Natural Science Foundation of China[42306059] ; Ministry of Oceans and Fisheries, Korea[20210607] ; China Postdoctoral Science Foundation[2020M682246] ; China Scholarship Council |
| WOS研究方向 | Geology ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:001533241700001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/202592]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Lee, Guan-hong |
| 作者单位 | 1.Inha Univ, Dept Oceanog, 100 Inharo, Incheon 22212, South Korea 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Wenjian,Lee, Guan-hong,Chang, Jongwi,et al. Floc size asymmetry modulated by tidal dynamics drives net landward sediment transport in a man-made tidal channel[J]. MARINE GEOLOGY,2025,488:16. |
| APA | Li, Wenjian,Lee, Guan-hong,Chang, Jongwi,Ajama, Ojudoo Darius,&Wang, Zhenyan.(2025).Floc size asymmetry modulated by tidal dynamics drives net landward sediment transport in a man-made tidal channel.MARINE GEOLOGY,488,16. |
| MLA | Li, Wenjian,et al."Floc size asymmetry modulated by tidal dynamics drives net landward sediment transport in a man-made tidal channel".MARINE GEOLOGY 488(2025):16. |
入库方式： OAI收割
来源：海洋研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。