河水的流动动力学、盐田和细沉积物

IF 0.2 Q4 WATER RESOURCES
M. Fossati , P. Santoro , R. Mosquera , C. Martínez , F. Ghiardo , P. Ezzatti , F. Pedocchi , I. Piedra-CuevaI
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引用次数: 12

摘要

本文基于RMA、MOHID、MARS等多种模型的实现,结合已有的高质量野外资料,总结了本课组在Río de la Plata流动和物质输运动力学研究方面取得的主要进展。在Río de la Plata,影响水循环的主要作用力是其支流的流量、潮汐波(天文和气象)和风。在Río de la Plata的内中部地区和外部地区之间存在明显的差异。这两个区域之间的分界被称为额区,那里的剖面相当宽,深度增加。由于这些特点,来自大西洋的盐度场到达该区域,在盐水分层更明显的深层区域强度更大。这反过来又使中部地区的剩余速度具有典型的二维流动特征(向外区域净输送),而外部地区的剩余流量则表现出更复杂的三维特征,主要是深部地区的流入流向大陆,而流量主要通过浅海岸区。额叶区有一块几乎没有剩余电流的区域。除了水体的这种明显的空间差异之外,气象条件也有决定性的影响。本文讨论了风平浪静和风暴条件下海流、盐度和细沙动力学的变化规律。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dinámica de flujo, del campo salino y de los sedimentos finos en el Río de la Plata

This article summarizes the main advances made by our group in the study of flow and substance transport dynamics in the Río de la Plata, based on the implementation of various models (RMA, MOHID, MARS) and incorporating existing high-quality field information. In the Río de la Plata, the main forcings that influence water circulation are flow discharge from its tributaries, tide waves (astronomic and meteorologic), and winds. There is a clear difference between the inner-middle region and the outer region of the Río de la Plata. The division between these two regions is known as the frontal region, where there is considerable widening of the section and an increase in depth. Because of these characteristics, the salinity field coming from the Atlantic Ocean reaches this region, with greater intensity in the deep regions where the saline stratification is more pronounced. This in turn gives the residual velocities in the middle region the typical two-dimensional characteristics of a flow discharge (net transport toward the outer region), while the residual flow in the outer region shows more complex, three-dimensional characteristics, with mainly incoming flow toward the continent in the deep areas and flow discharge mainly through the shallow coastal areas. There is an area of almost nil residual current in the frontal region. In addition to this clear spacial difference in the behavior of the body of the water, the meteorological conditions have a determining influence. The present study discusses diverse behaviors of the currents, salinity and fine sediment dynamics under calm and storm conditions.

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