多项填海工程作用下对渤海湾潮流场及污染物的影响

发布时间：2018-01-03 11:03

本文关键词：多项填海工程作用下对渤海湾潮流场及污染物的影响　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着沿海地区的经济快速发展，沿海地区土地需求增大，围海造地成为扩展土地的一个重要途径。在我国目前的海岸工程建设中，大规模的填海造陆工程正在日益增多，而渤海湾填海工程项目尤甚。为了评估多项填海工程联合作用引起的渤海湾整体海域内物质输运的影响，有必要首先研究海湾的潮流场，分析海湾内潮流动力的变化情况。本文通过建立渤海大范围潮流数学模型，并与实测潮位进行对比验证模型的正确性。在此基础上通过建立渤海湾在不同地形下的潮流数学模型，将渤海湾海域分为不同区域，，对比分析不同地形作用下对渤海湾整体及局部区域潮流动力的影响，得出渤海湾在天津港单独作用下及天津港、曹妃甸港联合作用下引起的渤海湾潮流场变化情况，并且由于曹妃甸港区平面布置纵向深入外海，而天津港顺岸布置，导致曹妃甸港对渤海湾的影响范围和影响强度比天津港对渤海湾潮流场的影响强烈很多的结论。同时，在渤海湾潮流场的基础上，本文也对湾内由潮流场变化引起的污染物扩散变化做了对比分析。结果表明，在天津港附近污染物主要在近岸随沿岸流运动；污染物的扩散速度和扩散范围随着渤海湾地形的改变，整体呈现减弱的趋势，说明污染物的扩散受地形改变的影响明显。
[Abstract]:With the rapid development of coastal economy, the demand for land in coastal areas increased, land reclamation has become an important way to expand land. At present in China's coastal engineering construction, large-scale land reclamation projects are increasing, and the Bohai Bay reclamation project. In order to evaluate the material influence especially caused by combined effect of a number of reclamation engineering the Bohai Bay sea transport in the field, it is necessary to study the trend of first Gulf, analysis of the changes of the hydrodynamic conditions in the bay.
In this paper, through the establishment of a wide range of Bohai tidal numerical model, and verified the correctness of the model with the measured water level. On the basis of the current mathematical model under different terrain conditions in Bohai Bay, Bohai Bay will be divided into different regions, the comparative analysis of different landforms in Bohai Bay and influence the overall and local regional trend for power next, come to Bohai Bay in the port of Tianjin alone and the effect of Tianjin port, Bohai Bay tidal field changes caused by Caofeidian port under the joint action, and because the Caofeidian port layout and vertical deep sea, along the coast of Tianjin port layout, resulting in Caofeidian port of Bohai Bay and the influence scope and intensity than the impact of Tianjin port on the Bohai Bay tidal field a lot of conclusions.
At the same time, based on the current field in Bohai Bay on the bay of pollutants caused by tidal field change diffusion changes have been compared and analyzed. The results show that the main pollutants in the vicinity of Tianjin port in the nearshore with coastal current movement; pollutant diffusion rate and diffusion range with the Gulf of Bohai topography changes, the overall trend abate that, the spread of pollutants affected by the terrain changes obviously.

【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P756.8;P731.2;X55

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