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Hydrodynamics of Canal Istanbul and its impact in the northern Sea of Marmara under extreme conditions

机译:在极端条件下,运河伊斯坦布尔的流体动力学及其在马尔马拉北海的影响

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摘要

The Bosphorus, located at the junction of Asia and Europe, controls the transports of water, material, and energy between the Black Sea (BS) and the Mediterranean Sea. The Canal Istanbul (CI), planned by Republic of Turkey (TR), is a gigantic project which bisects the current European side of Istanbul, thus forming a secondary waterway parallel to the existing natural channel of the Bosphorus. The environmental impact of this project has been a major concern since the very beginning. To address this concern, a 3D hydrodynamic modeling study is carried out to investigate the impact of CI on the hydrodynamics and salinity of the northern Sea of Marmara (SM) by using the route and cross-section (CS) of canal, which was recently made public by the TR. An extensive set of model calibration is performed in a model where only the Bosphorus Strait links the Black Sea and Marmara Sea. Once the calibration process is completed, the future canal is added into the grid and new simulations are performed to analyze the influence of CI on hydrodynamics and salinities in the SM. It was found that the shallow water depth of CI is the limiting factor constraining the two-layer flow. Thus the vertical current structure of CI appears mostly as one-layer flow from the BS to the SM. One-layer flow from the SM toward the BS is rarely observed. In such cases, strong northerly storms caused water level setup at the SM and set down at the BS. Adding the CI in the model is responsible for a salinity decrease of ~1 ppt in the surface layer of SM. The salinity difference between the two models decreases gradually with the depth and it diminishes at the depth of 25 m.
机译:位于亚洲和欧洲交界处的Bosphorus控制了黑海(BS)和地中海之间的水,材料和能量的运输。由土耳其共和国(TR)计划的运河伊斯坦布尔(CI)是一项巨大的项目,使伊斯坦布尔目前的欧洲侧面分开,从而形成平行于博斯普鲁斯类的现有天然通道的二级水路。这项项目的环境影响是自一开始以来的主要问题。为了解决这一问题,进行了一种3D流体动力学建模研究,以研究CI通过使用运河的路线和横截面(CS)对Marmara(SM)北部海洋的流体动力学和盐度的影响由tr公开。在只有Bosphorus海峡链接黑海和马尔马拉海的模型中进行了广泛的模型校准。一旦校准过程完成,将来的运河被添加到网格中,并进行新的模拟,以分析CI对SM流体动力学和盐度的影响。发现CI的浅水深度是限制两个层流的限制因子。因此,CI的垂直电流结构主要出现为从BS到SM的单层流。很少观察到从SM朝向BS的单层流动。在这种情况下,强烈的北方风暴导致SM的水位设置并在BS处设置。在模型中添加CI负责SM的表面层中的盐度减小〜1 ppt。两种型号之间的盐度差异随深度逐渐降低,并且在25米的深度下减少。

著录项

  • 来源
    《Ocean Dynamics》 |2020年第6期|745-758|共14页
  • 作者单位

    Faculty of Civil Engineering Hydraulics Division Istanbul Technical University Istanbul Turkey;

    Faculty of Civil Engineering Hydraulics Division Istanbul Technical University Istanbul Turkey;

    Institute of Coastal Research Helmholtz-Zentrum Geesthacht Geesthacht Germany;

    Faculty of Civil Engineering Hydraulics Division Istanbul Technical University Istanbul Turkey;

    South Eastern European Network for Research and Health Sarajevo Bosnia and Herzegovina;

    Faculty of Civil Engineering Environmental Engineering Division Istanbul Technical University Istanbul Turkey;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bosphorus Strait; Canal Istanbul; Hydrodynamic modeling; Salinity; Sea of Marmara;

    机译:博斯普鲁斯海峡;运河伊斯坦布尔;流体动力学建模;盐度;马尔马拉海;

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