辐射沙洲区域围填工程对水沙环境稳定性影响

发布时间：2018-02-20 18:35

本文关键词： 南通海域围海造港潮流场数值模拟冲淤影响　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着沿海地区经济的迅猛发展,沿海地区土地需求量不断增大,围海造地成为扩展土地资源的一个重要途径。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,南通海域围海造港工程也正在大规模进行中。为了评估辐射沙洲区域填海造港工程对沙洲及水道海域内物质输运、地形冲刷、淤积的影响,有必要首先研究南通海域的潮流场变化情况,分析远期规划对该海域潮流水动力的变化情况。本文建立了南黄海大范围潮流数学模型,并与实测潮位进行对比验证,确定了模型的正确性。在此基础上通过建立南通海域在不同地形下的潮流数学模型,重点对南通海域通州湾的远期规划进行研究,对比分析在通州湾2030年远期规划后不同地形作用下对整个辐射沙洲区域及通州湾局部区域潮流动力的影响,得出南通海域在围海造港远期规划工程作用下引起的潮流场变化情况,验证辐射沙洲区域围填造港规划的合理性及可行性,为今后辐射沙洲区域围填沙洲建港提供一定的理论依据及指导方法。同时,在南通海域潮流场的基础上,本文也对通州湾由潮流场变化引起的泥沙冲刷、淤积变化做了对比分析。结果表明,在冷家沙围填港区根部以北附近及港区堤头南侧造成一定淤积,在港区以东造成一定冲刷;腰沙港区中部以南位置造成一定淤积,其余各处冲淤情况不明显,说明通州湾的远期规划合理可行。
[Abstract]:With the rapid economic development of coastal areas, the land demand in coastal areas is increasing, and reclamation of land has become an important way to expand land resources. Large scale reclamation projects are increasing day by day, and so are the reclamation projects in the Nantong Sea area. In order to assess the transport of materials in the sandbanks and waterways by the reclamation and port building projects in the radiation sand island area, the topography is washed away. It is necessary to study the variation of tidal current field in Nantong sea area first and analyze the variation of tidal current hydrodynamic force in Nantong sea area by long-term planning. In this paper, a large-scale tidal current mathematical model of South Huang Hai is established. The correctness of the model is confirmed by comparing it with the measured tidal level. On this basis, the forward planning of Tongzhou Bay in Nantong Sea area is studied by establishing a mathematical model of tidal current in Nantong Sea area under different topography. The influence of different topography on the tidal current dynamics of the whole radiative sand bar area and the local area of Tongzhou Bay after the 2030 long term planning in Tongzhou Bay is analyzed. The variation of tidal current field in Nantong sea area caused by the forward planning project of reclaimed harbour is obtained, and the rationality and feasibility of the reclamation and port construction planning in the area of radioactive sand banks are verified. This paper provides some theoretical basis and guiding method for the construction of the surrounding sand banks in the area of radioactive sandbanks in the future. At the same time, on the basis of the tidal current field in Nantong sea area, the sediment caused by the variation of the tidal current field in Tongzhou Bay is also washed out in this paper. The results show that there is a certain amount of siltation near the root of Lengjiazhai Reclamation Port and the south side of the head of the embankment of the Port area, and a certain amount of erosion to the east of the port area, and a certain amount of silt to the south of the middle part of the Yaosha Port area. The situation of scour and siltation in other places is not obvious, which shows that the long-term planning of Tongzhou Bay is reasonable and feasible.
【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】：U655.5

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