Numerical simulation on the process of saltwater intrusion and its impact on the suspended sediment concentration in the Changjiang(Yangtze)estuary
文献类型：CNKI期刊论文
| 作者 | Pang ZG(庞重光); Zhao EB(赵恩宝); Yang Y(杨扬) |
| 发表日期 | 2010-05-15 |
| 出处 | Chinese Journal of Oceanology and Limnology
 |
| 关键词 | Changjiang (Yangtze) estuary ECOMSED saltwater wedge suspended sediment concentration numerical simulation |
| 英文摘要 | To study the relationship between sediment transportation and saltwater intrusion in the Changjiang (Yangtze) estuary, a three-dimensional numerical model for temperature, salinity, velocity field, and suspended sediment concentration was established based on the ECOMSED model. Using this model, sediment transportation in the flood season of 2005 was simulated for the Changjiang estuary. A comparison between simulated results and observation data for the tidal level, flow velocity and direction, salinity and suspended sediment concentration indicated that they were consistent in overall. Based on model verification, the simulation of saltwater intrusion and its effect on sediment in the Changjiang estuary was analyzed in detail. The saltwater intrusion in the estuary including the formation, evolution, and disappearance of saltwater wedge and the induced vertical circulation were reproduced, and the crucial impact of the wedge on cohesive and non-cohesive suspended sediment distribution and transportation were successfully simulated. The result shows that near the salinity front, the simulated concentrations of both cohesive and non-cohesive suspended sediment at the surface layer had a strong relationship with the simulated velocity, especially when considering a 1-hour lag. However, in the bottom layer, there was no obvious correlation between them, because the saltwater wedge and its inducing vertical circulation may have resuspended loose sediment on the bed, thus forming a high-concentration area near the bottom even if the velocity near the bottom was very low during the transition phase from flood to ebb. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the National Natural Science Foundation of China (No. 40406025) ; the National High Technology Research and Development Program of China (863 Program) (No. 2006AA09Z157) |
| 卷 | v.28期:03页:185-194 |
| 语种 | 英文; |
| 分类号 | P737.14 |
| ISSN号 | 0254-4059 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/192126]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.GraduateSchoolofChineseAcademyofSciences 2.InstituteofOceanology,ChineseAcademyofSciences 3.ShanghaiInstituteofWaterways |
| 推荐引用方式 GB/T 7714 | Pang ZG,Zhao EB,Yang Y. Numerical simulation on the process of saltwater intrusion and its impact on the suspended sediment concentration in the Changjiang(Yangtze)estuary. 2010. |
入库方式： OAI收割
来源：海洋研究所
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