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首页> 外文期刊>Estuarine Coastal and Shelf Science >Physical characteristics and discharges of suspended particulate matter at the continent-ocean interface in an estuary located in a semiarid region in northeastern Brazil
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Physical characteristics and discharges of suspended particulate matter at the continent-ocean interface in an estuary located in a semiarid region in northeastern Brazil

机译：位于巴西东北部半干旱地区河口的大陆-海洋界面的悬浮颗粒物的物理特征和排放

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摘要

This study reports the hydrodynamics of the transport of suspended particulate matter (SPM) in the Jaguaribe River estuary, which receives the runoff from the largest drainage basin in the state of Ceara, Brazil. The estuary is located in the semiarid region of Brazil, where rainfall occurs primarily between January and May and results in water flow rates exceeding 3000 m(3)s(-1). The drainage basin contains more than 4000 dams, which, during the dry season, block most of the flow of freshwater and sediment. The net balance and transport of sediments were calculated for the wet and dry seasons considering a tidal cycle of 13 h at the interfaces between the upper and middle estuary and between the middle and lower estuary. The Jaguaribe River estuary is classified as partially mixed with weak vertical stratification and a tendency toward being well mixed. The SPM transported during the rainy season originates in the drainage basin due to high river inflow, whereas during the dry season, resuspension and hydraulic fills generated by tides causes the accumulation of SPM in the middle estuary, forming a zone of maximum turbidity. The transport of salt in the estuary was predominantly caused by gravity flow and tidal propagation. (C) 2016 Elsevier Ltd. All rights reserved.
机译：这项研究报告了Jaguaribe河河口中悬浮颗粒物（SPM）输送的流体动力学，该河口从巴西塞阿拉州最大的流域接收了径流。河口位于巴西的半干旱地区，降雨主要发生在一月至五月之间，导致水流量超过3000 m（3）s（-1）。流域包含4000多个水坝，在干旱季节，这些水坝阻挡了大部分淡水和沉积物的流动。考虑到上河口和中河口之间以及中河口和下河口之间的界面的潮汐周期为13 h，计算了干季和湿季的沉积物净平衡和输运量。 Jaguaribe河口被分类为部分混合，垂直分层较弱，且混合趋势趋于良好。雨季运输的SPM由于河流大量涌入而发源于流域，而在旱季，潮汐产生的悬浮物和水力填充物导致SPM在河口中部积聚，形成最大浊度区。盐在河口的运输主要是由重力流和潮汐传播引起的。 （C）2016 Elsevier Ltd.保留所有权利。

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