Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL089065 |
Tropical cyclones significantly alleviate mega‐deltaic erosion induced by high riverine flow | |
Jie Wang; Zhijun Dai; Xuefei Mei; Sergio Fagherazzi | |
2020-09-30 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | The drastic decline in sediment discharge experienced by large rivers in recent years might trigger erosion thus increasing the vulnerability of their extensive deltas. However, scarce information is available on the erosion patterns in mega‐deltas and associated physical drivers. Here, a series of bathymetries in the South Passage, Changjiang Delta, were analyzed to identify morphodynamic variations during high riverine flow and tropical cyclones (TC). Results indicate that high river flow during flood season triggers large‐scale net erosion along the inner estuary, generating elongated erosion‐deposition patches. Erosion magnitude gradually weakens moving seaward with few localized bottom variations in the offshore area. TCs transport sediment landward and are accompanied by an overall weak erosion, with a less organized spatial pattern of erosion‐deposition. TCs can therefore significantly alleviate erosion, reducing the sediment loss induced by riverine flows by over 50%. These results highlight the role of TCs on the sediment dynamics of mega‐deltas. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/297819 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Jie Wang,Zhijun Dai,Xuefei Mei,等. Tropical cyclones significantly alleviate mega‐deltaic erosion induced by high riverine flow[J]. Geophysical Research Letters,2020. |
APA | Jie Wang,Zhijun Dai,Xuefei Mei,&Sergio Fagherazzi.(2020).Tropical cyclones significantly alleviate mega‐deltaic erosion induced by high riverine flow.Geophysical Research Letters. |
MLA | Jie Wang,et al."Tropical cyclones significantly alleviate mega‐deltaic erosion induced by high riverine flow".Geophysical Research Letters (2020). |
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