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首页> 外文期刊>Journal of marine systems: journal of the European Association of Marine Sciences and Techniques >A numerical modeling study on oceanographic conditions in the former Gulf of Tartessos (SW Iberia): Tides and tsunami propagation
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A numerical modeling study on oceanographic conditions in the former Gulf of Tartessos (SW Iberia): Tides and tsunami propagation

机译：前特尔特索斯海湾（西南伊比利亚）海洋条件的数值模拟研究：潮汐和海啸传播

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摘要

At least five catastrophic tsunami events have affected the Iberian Atlantic coasts during the last 7000 years. During this time, the former Gulf of Tartessos evolved towards the present marshland area, in the lower Guadalquivir valley (SW Spain). Ancient cultures flourished and vanished around this waterbody which, with its tidal dynamics, was an essential part of their living environment. A numerical modeling study on oceanographic conditions (tide and tsunami propagation) in the former Gulf of Tartessos has been carried out, in order to improve our insight on how they could have influenced the human activities in this area. The model solves the 2D depth-averaged hydrodynamic equations with appropriate initial and boundary conditions for tides and tsunamis. The model has been tested through simulation of tides under present bathymetry and of past tsunamis for which historical records exist. Then the bathymetry of the Gulf of Tartessos has been reconstructed for 2200 and 4000 years BP. The two main tidal semidiurnal and diurnal constituents have been simulated. Results indicate that they suffer a strong attenuation in the Gulf for both bathymetries, with significant currents only in its entrance. The known main active faults in the Gulf of Cadiz and the 1755 Lisbon source have been selected as case studies of tsunami propagation in the former Gulf of Tartessos. The 1755 Lisbon tsunami represented the worst case situation, and its numerical simulation has been subjected to several sensitivity tests. Results reveal negligible impacts for the inner shoreline of the Gulf of Tartessos, but severe damage could have been produced along the Atlantic coasts of SW Spain, from Cadiz to Huelva. (C) 2014 Elsevier B.V. All rights reserved.
机译：在过去的7000年中，至少有五次灾难性海啸事件影响了伊比利亚大西洋沿岸地区。在此期间，前特尔特索斯湾（Gulf of Tartessos）向现在的瓜达基维尔河谷（西班牙西南部）的沼泽地发展。古代文化在这个水域周围繁荣和消失，而水域具有潮汐动力，是其生存环境的重要组成部分。已经对前特尔特索斯湾的海洋条件（潮汐和海啸传播）进行了数值模拟研究，以增进我们对它们如何影响该地区人类活动的认识。该模型使用潮汐和海啸的适当初始条件和边界条件来求解二维深度平均流体力学方程。该模型已通过模拟目前的测深法和现有海啸的潮汐进行了测试。然后，重建了特尔特索斯湾的水深为2200和4000年BP。模拟了两个主要的潮汐半日和日潮成分。结果表明，它们在两个海深处都遭受了强烈的衰减，只有在其入口处才有大电流。选择了加的斯湾和1755年里斯本源已知的主要活动断层作为海啸在前特尔特索斯湾传播的案例研究。 1755年的里斯本海啸代表了最坏的情况，其数值模拟已经过几次敏感性测试。结果表明，对特尔特索斯湾内海岸线的影响可以忽略不计，但是从加的斯到韦尔瓦，西班牙西南大西洋沿岸可能造成了严重破坏。 （C）2014 Elsevier B.V.保留所有权利。

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