气候变化领域集成服务门户(CCPortal): Modeling the Suspended Sediment Transport in a Very Wide, Shallow, and Microtidal Estuary, the Río de la Plata, Argentina

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DOI	10.1029/2018MS001605
	Modeling the Suspended Sediment Transport in a Very Wide, Shallow, and Microtidal Estuary, the Río de la Plata, Argentina
	Moreira D.; Simionato C.G.
发表日期	2019
ISSN	19422466
起始页码	3284
结束页码	3304
卷号	11 期号:10
英文摘要	The impact of the diverse processes responsible for the distribution of suspended sediments in the wide, shallow, and microtidal Río de la Plata estuary and the adjacent shelf is studied by means of a set of process-oriented numerical simulations. Model results show that the large width and the geometry of the estuary play a major role in the sedimentation processes. The widening and deepening of the estuary drives a significant reduction in current speeds at (i) the confluence of the tributaries and (ii) downstream Barra del Indio Shoal. Thus, sediment deposition enhances downstream those areas. Even though tides are of small amplitude in the study area, they have a significant impact on lateral mixing and resuspension of the bottom sediments. Resuspension augments the concentration of fine sediments in the layers close to the bottom, but tidal energy is not enough to lift them to the surface. Winds (which can be quite strong over this area) enhance horizontal mixing, smoothing the pattern produced by tides. Wind waves increase the concentration of sediment by vertical mixing, and their effect is most evident along the southern coast where wind waves lift the sediments resuspended by tides to the surface. The estuarine circulations associated to the bottom salinity front acts retaining sediments upstream the Barra del Indio Shoal, where estuarine currents and flocculation play an important role in sediment deposition. ©2019. The Authors.
英文关键词	estuaries dynamics; hydro-sedimentological modeling; Río de la Plata estuary; sediment transport; sedimentological processes; suspended sediment
语种	英语
scopus关键词	Estuaries; Mixing; Sediment transport; Sedimentation; Tidal power; Tides; Bottom sediments; Estuarine circulation; Lateral mixing; Process-oriented; Sediment deposition; Sedimentation process; Small amplitude; Vertical mixing; Suspended sediments; concentration (composition); confluence; estuarine dynamics; flocculation; hydrological modeling; salinity; sediment transport; smoothing; wind wave; Argentina; Rio de la Plata
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156845
作者单位	Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigaciones del Mar y la Atmósfera (CIMA/UBA-CONICET), Universidad de Buenos Aires, Buenos Aires, Argentina; Facultad de Ciencias Exactas y Naturales, Departamento de Ciencias de la Atmósfera y los Océanos (DCAO/FCEN/UBA), Universidad de Buenos Aires, Buenos Aires, Argentina; Institut Franco-Argentin d'Estudes sur le Climat et ses Impacts, Unité Mixte Internationale (UMI-IFAECI/CNRS-CONICET-UBA), Buenos Aires, Argentina
推荐引用方式 GB/T 7714	Moreira D.,Simionato C.G.. Modeling the Suspended Sediment Transport in a Very Wide, Shallow, and Microtidal Estuary, the Río de la Plata, Argentina[J],2019,11(10).
APA	Moreira D.,&Simionato C.G..(2019).Modeling the Suspended Sediment Transport in a Very Wide, Shallow, and Microtidal Estuary, the Río de la Plata, Argentina.Journal of Advances in Modeling Earth Systems,11(10).
MLA	Moreira D.,et al."Modeling the Suspended Sediment Transport in a Very Wide, Shallow, and Microtidal Estuary, the Río de la Plata, Argentina".Journal of Advances in Modeling Earth Systems 11.10(2019).