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| DOI | 10.1016/j.jmarsys.2023.103961 |
| Different effects between cold front and tropical cyclone on short-term morphodynamics in the Changjiang Delta | |
| 发表日期 | 2024 |
| ISSN | 0924-7963 |
| EISSN | 1879-1573 |
| 起始页码 | 243 |
| 卷号 | 243 |
| 英文摘要 | Global climate change is altering the frequency and intensity of extreme weather events such as typhoons and cold fronts, and this is inducing physical changes and adaptions in estuaries and coasts. We conducted a field campaign on the subaqueous Changjiang Delta front in September 2019 to improve understanding of storm impact on short-term hydro-morphodynamics. Over an 11 -day period, during which both typhoon and cold front events occurred, in -situ data including flow velocities, suspended sediment concentrations (SSC), and bed -level changes were acquired using bottom tripod and buoyage systems, Significant wave height reached 5.0 m during the typhoon, and the depth -averaged current velocity increased to 1.7 m/s. The net near -bottom sediment flux was in the same direction as the wind and was 5.5 times of that under calm weather. During the cold -front, significant wave height reached 2.5 m, and the near -bottom SSC increased to 7.0 kg/m(3). Bed -level changes were small (<2 cm) under pre -storm weather, while net deposition and erosion reached 15.8 cm and 16.8 cm, respectively, during the typhoon. Short-term changes in the sediment source -to -sink regime were detected in the subaqueous Changjiang Delta. The cold front enhances seaward sediment flushing from the delta towards the sea, while the typhoon drives sediment transport from the subaqueous delta towards Hangzhou Bay. We also observed rapid bed -level recovery following these extreme events. These findings improve our understanding of sediment transport under stormy conditions. |
| 英文关键词 | Changjiang Delta; Hydrodynamics; Morphodynamics; Storm; Sedimentary process |
| 语种 | 英语 |
| WOS研究方向 | Geology ; Marine & Freshwater Biology ; Oceanography |
| WOS类目 | Geosciences, Multidisciplinary ; Marine & Freshwater Biology ; Oceanography |
| WOS记录号 | WOS:001162401000001 |
| 来源期刊 | JOURNAL OF MARINE SYSTEMS
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/299608 |
| 作者单位 | East China Normal University; William & Mary; Virginia Institute of Marine Science; Sun Yat Sen University |
| 推荐引用方式 GB/T 7714 | . Different effects between cold front and tropical cyclone on short-term morphodynamics in the Changjiang Delta[J],2024,243. |
| APA | (2024).Different effects between cold front and tropical cyclone on short-term morphodynamics in the Changjiang Delta.JOURNAL OF MARINE SYSTEMS,243. |
| MLA | "Different effects between cold front and tropical cyclone on short-term morphodynamics in the Changjiang Delta".JOURNAL OF MARINE SYSTEMS 243(2024). |
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