气候变化领域集成服务门户(CCPortal): Tropical Cyclones Significantly Alleviate Mega-Deltaic Erosion Induced by High Riverine Flow

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DOI	10.1029/2020GL089065
	Tropical Cyclones Significantly Alleviate Mega-Deltaic Erosion Induced by High Riverine Flow
	Wang J.; Dai Z.; Mei X.; Fagherazzi S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
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 (TCs). 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. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Deposition; Hurricanes; Offshore oil well production; Sediments; Storms; Tropics; Erosion deposition; Erosion patterns; Offshore area; Sediment discharge; Sediment dynamic; Sediment loss; Spatial patterns; Tropical cyclone; Erosion; flood; river flow; sediment transport; tropical cyclone; China; Yangtze Delta
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169644
作者单位	State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Department of Earth and Environment, Boston University, Boston, MA, United States
推荐引用方式 GB/T 7714	Wang J.,Dai Z.,Mei X.,et al. Tropical Cyclones Significantly Alleviate Mega-Deltaic Erosion Induced by High Riverine Flow[J],2020,47(19).
APA	Wang J.,Dai Z.,Mei X.,&Fagherazzi S..(2020).Tropical Cyclones Significantly Alleviate Mega-Deltaic Erosion Induced by High Riverine Flow.Geophysical Research Letters,47(19).
MLA	Wang J.,et al."Tropical Cyclones Significantly Alleviate Mega-Deltaic Erosion Induced by High Riverine Flow".Geophysical Research Letters 47.19(2020).