温州连岛工程对瓯江口水动力的影响分析

发布时间：2018-04-20 22:06

本文选题：水环境影响评价 + 瓯江口潮汐特征　；参考：《浙江工业大学》2016年硕士论文

【摘要】：瓯江口地区是我国人口众多、经济较为发达的地区,近年来随着经济的发展,该地区土地资源紧缺和人口增长的问题也日渐突出,同时瓯江口的滩涂资源非常丰富,是温州市向外拓展的重要区域,因此,温州连岛工程的建设是缓解温州市人民土地匮乏的良好选择。然而,温州连岛工程在提供宝贵陆地资源的同时,也会不同程度地影响工程附近海域水动力特性。因此在尽可能的减小周边海域水动力特性的前提下,合理的围海造地对温州市的可持续发展有着非常重要的意义。三维数值模型可以准确描述水体的真实流动,而且还可以体现二维数值模型的成果,现已得到广泛的应用。本次论文基于FVCOM三维数值模型,对瓯江口地区围涂开发的各种工况下水动力特性进行了数值模拟,为温州连岛工程建设的可行性提供有力的技术支撑。论文的主要工作有:(1)对国内外围海工程发展情况进行了简要地介绍,以温州瓯江口水域为例,从水文、径流、潮汐、潮流、盐度等不同水动力特性进行了详细的分析,揭示了周边地貌、水动力特征,并简要叙述了瓯江口的发展情况。(2)对FVCOM海洋数值模型进行了详细的介绍,并利用该模型对瓯江口的三维水动力环境在不同工况下进行了数值模拟。基于实测及相关研究资料,对数值模型进行了验证与分析,计算结果与实测的潮位、流速等数据基本符合,较好地反映了温州浅滩潮汐、潮流运动、流速的变化状况和分布特征。(3)对温州浅滩围涂工程前后的瓯江口海域水动力环境进行了数值模拟,系统分析了温州浅滩围涂工程完工后,周边海域水动力特征的变化情况。主要针对全围、不围及有无潮汐通道等不同工况下连岛工程的建设对瓯江口周围水域的潮位、潮流、流速和余流场的影响。分析表明:由于工程所建的灵霓大堤、堰围与潮流的走向基本一致,潮汐通道的建设与否不会大范围改变瓯江口水域的水动力特性,仅对工程附近水域产生影响,但并不明显。
[Abstract]:The Oujiang Estuary is a region with a large population and a relatively developed economy. With the development of economy in recent years, the problems of land resources shortage and population growth in the Oujiang Estuary have become increasingly prominent. At the same time, the tidal flat resources in the Oujiang Estuary are very rich. Wenzhou is an important area to expand outward, so the construction of Wenzhou Lian Dao Project is a good choice to alleviate the people's land shortage in Wenzhou. However, while providing valuable land resources, Wenzhou Lian Dao Project will affect the hydrodynamic characteristics of the adjacent waters in varying degrees. Therefore, on the premise of minimizing the hydrodynamic characteristics of the surrounding sea area, reasonable land reclamation is of great significance to the sustainable development of Wenzhou City. Three-dimensional numerical model can accurately describe the real flow of water, and can also reflect the results of two-dimensional numerical model, which has been widely used. Based on the FVCOM three-dimensional numerical model, the hydrodynamic characteristics of the surrounding coating development in Oujiang Estuary are numerically simulated in order to provide strong technical support for the feasibility of the construction of Wenzhou Liandao Project. The main work of this paper is: (1) briefly introducing the development of the reclamation project at home and abroad. Taking the Oujiang Estuary of Wenzhou as an example, the hydrodynamic characteristics of different hydrodynamics, such as hydrology, runoff, tide, tidal current, salinity and so on, are analyzed in detail. The geomorphology and hydrodynamic characteristics of the surrounding area are revealed, and the development of the Oujiang Estuary is briefly described. The numerical model of the FVCOM ocean is introduced in detail. The three-dimensional hydrodynamic environment of Oujiang Estuary is numerically simulated under different working conditions. Based on the measured data and related research data, the numerical model is verified and analyzed. The calculated results are in good agreement with the measured tidal level and velocity, which reflect the tidal and tidal current movement in Wenzhou shoal. The hydrodynamic environment of the Oujiangkou sea area before and after the Wenzhou shoal reclamation project is numerically simulated, and the variation of the hydrodynamic characteristics of the surrounding sea area after the completion of the Wenzhou shoal coating project is systematically analyzed. The influence of the construction of the island connection project on the tidal level, tidal current, velocity and residual flow field in the waters around the Oujiang Estuary under different working conditions, such as the total circumference, the non-circumference and the tidal passage or not, is mainly discussed. The analysis shows that the Weir girth is basically consistent with the trend of tidal current, and the hydrodynamic characteristics of the Oujiang Estuary will not be changed in a large scale, but it is not obvious that the construction of the tidal passage will only affect the surrounding waters of the Oujiang River Estuary.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P75;P731.2

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