Synchronism of sediment erosion and deposition processes during high-turbidity events in a large shallow lake
文献类型：期刊论文
| 作者 | Wu, Tingfeng2; Sheng, Yongwei1; Chen, Dong3,4; Qin, Boqiang2 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2023-08-01 |
| 卷号 | 623页码:13 |
| 关键词 | Synchronism Sediment erosion Sediment deposition High-turbidity events Shallow lake Three-dimensional sediment transport model |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2023.129853 |
| 通讯作者 | Qin, Boqiang(qinbq@niglas.ac.cn) |
| 英文摘要 | High-turbidity events (HTEs) frequently occur in shallow lakes and can deeply influence lake ecosystems. However, the processes of sediment erosion and deposition are not fully understood. To investigate these processes, two investigative campaigns that integrate bed sediment measurements, sediment settling experiments, in-situ observations, or a hydrodynamics-sediment model were conducted to quantitatively study wind-induced HTEs in Lake Taihu, China. Cohesive sediments were massively entrained from the lakebed by wind waves when the wind speed exceeded its critical value of 7 m s-1, as estimated by water depth, triggering HTEs with turbidity waves of > 100 nephelometric turbidity units. The suspended sediment concentration was the net sediment flux of erosion (average: 5.9 mg m- 2 s- 1) and deposition (average: 5.5 mg m- 2 s- 1), which occurred synchronously for most of the HTEs and resulted in high temporal variation in suspended sediment concentration. This synchronism was determined by the critical erosional stress of lakebed sediments, which was spatially heterogeneous (0.017-0.055 N m- 2) in a large lake. Equations for erosion and deposition processes were derived following the investigative campaigns and used to develop a cohesive sediment transport model for simulating HTEs in Lake Taihu. Simulations indicate that the synchronism of sediment erosion and deposition led to a nearlakebed turbid water layer during an HTE, which sustained the sediment lutocline in Lake Taihu. Further investigation should be conducted on the role of the near-lakebed turbid water layer during endogenous pollution in large eutrophic lakes. |
| WOS关键词 | WIND-WAVE IMPACT ; TAIHU LAKE ; COHESIVE SEDIMENT ; SPATIAL-DISTRIBUTION ; TRANSPORT MODEL ; RESUSPENSION ; DYNAMICS ; DRIVEN ; WATER ; PHOSPHORUS |
| 资助项目 | National Natural Science Founda-tion of China[41971047] ; National Natural Science Founda-tion of China[41790425] ; National Natural Science Founda-tion of China[42220104010] ; Water Resources Department of Jiangsu Province[2021049] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001036329400001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Founda-tion of China ; Water Resources Department of Jiangsu Province |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/195844]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Qin, Boqiang |
| 作者单位 | 1.Univ Calif Los Angeles, Dept Geog, Los Angeles, CA 90095 USA 2.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing, Jiangsu, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Tingfeng,Sheng, Yongwei,Chen, Dong,et al. Synchronism of sediment erosion and deposition processes during high-turbidity events in a large shallow lake[J]. JOURNAL OF HYDROLOGY,2023,623:13. |
| APA | Wu, Tingfeng,Sheng, Yongwei,Chen, Dong,&Qin, Boqiang.(2023).Synchronism of sediment erosion and deposition processes during high-turbidity events in a large shallow lake.JOURNAL OF HYDROLOGY,623,13. |
| MLA | Wu, Tingfeng,et al."Synchronism of sediment erosion and deposition processes during high-turbidity events in a large shallow lake".JOURNAL OF HYDROLOGY 623(2023):13. |
入库方式： OAI收割
来源：地理科学与资源研究所
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