渤海海域围海工程对其潮位及潮流的影响

发布时间：2018-02-24 04:49

本文关键词： 围填海工程沿岸海区数学模型潮位海域规划　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着经济的发展,沿海土地资源日趋紧张,围填海开发已经成为沿海城市建设中的热点,因此,分析围填海工程造成的影响很有必要,对沿海海域规划具有重要指导作用。本文运用数学模型的方法对渤海海域围填海工程带来的影响进行研究探讨,其模型为具有自主知识产权的天津大学水流泥沙数学模型软件。本文按照“从海湾内海域到海湾外海域”的顺序进行分析,湾内海域包括三大海湾(渤海湾、莱州湾、辽东湾),湾外海域指的是渤海海域三大海湾以外的其他海域,研究内容包括相关海域的潮位变化和潮流运动特性变化。研究发现,在外海来潮量一定的条件下,大规模围海造陆后,渤海湾海区的潮位最高值明显增大,并且在越靠近湾口的海区,潮位上升值越小;反之,潮位上升值越大;2010年莱州湾潮位涨落幅度与2004年的相比,潮位涨落幅度增大,但其增大值远小于渤海湾的最高潮位增大值,因此可以认为,围海后,莱州湾海域的最高潮位有些许上升;围填海工程使得辽东湾海域的最高潮位升高,尤其是近陆域的海区,水位上升的现象明显。在对相关海域的潮流运动特性变化的研究中发现,大规模围海后,渤海湾和莱州湾的流速增大,且增大值由湾内海域向湾外海域逐渐变大;辽东湾海域辽阔,流速变化比另两个海湾复杂,流速变化值从湾内向湾外逐渐由负值增大到正值,离湾口海区越近的区域,流速增大越多,离湾口海区越远的区域,流速减小也越多。三大海湾的潮流流向改变值由湾内海域向湾外海域逐渐减小,即,离湾口越远的海域,潮流流向变化越大;反之,离湾口越近的海域,潮流流向变化越小。最后,从渤海三大海湾湾外海域的流速与流向的对比研究中发现,其流速和流向的变化规律既符合外海来潮一定的条件,也与三大海湾的潮流运动变化分析结果相呼应。
[Abstract]:With the development of economy, coastal land resources are becoming increasingly tight. Reclamation has become a hot spot in coastal city construction. Therefore, it is necessary to analyze the impact of reclamation. This paper uses the mathematical model method to study the influence of the reclamation project in the Bohai Sea area. The model is a mathematical model software of Tianjin University with independent intellectual property rights. This paper analyzes the sequence of "from the inside bay to the outside sea area", which includes three big bays (Bohai Bay, Laizhou Bay). The area outside the Liaodong Bay refers to other sea areas outside the three major bays of the Bohai Sea. The contents of the research include changes in the tidal level and the characteristics of tidal current movement in the relevant sea areas. The study found that under the condition of a certain amount of incoming tides outside the sea, After large-scale reclamation, the maximum tide level in the Bohai Bay area increases obviously, and the higher the tidal level in the area near the mouth of the bay, the smaller the rising value of the tidal level, whereas, the greater the rise value of the tidal level in the Laizhou Bay on 2010, the higher the range of the tidal level fluctuation in Laizhou Bay on 2010 compared with that in 2004. The range of tidal level fluctuation is increasing, but its increasing value is much smaller than the maximum tide level increase value of Bohai Bay. Therefore, it can be concluded that the maximum tide level in Laizhou Bay increases slightly after reclamations, and reclamation works make the maximum tide level rise in Liaodong Bay. Especially in the sea area near the land, the phenomenon of rising water level is obvious. In the study of the characteristic change of tidal current movement in the relevant sea area, it is found that the velocity of the Bohai Bay and the Laizhou Bay increases after the large-scale sea closure. And the increasing value gradually increased from the inside bay to the outside sea area, the Liaodong Bay sea area is vast, the velocity change is more complex than the other two bay, the velocity change value gradually increases from the negative value to the positive value outside the bay inward bay, the area closer to the bay mouth sea area, The more the velocity increases, the more the velocity decreases in the area farther away from the mouth of the bay. The change value of tidal current direction of the three major bays gradually decreases from the inside of the bay to the outside of the bay, that is, the farther from the mouth of the bay, the greater the direction of the tidal current changes; conversely, The closer it is to the mouth of the bay, the smaller the change of tidal current direction is. Finally, from the comparative study of the velocity and direction of the sea area outside the three big Gulf Bay of the Bohai Sea, it is found that the variation law of the velocity and direction of the current conforms to the certain conditions of the coming tide outside the sea. It is also consistent with the analysis results of tidal current movement in the three major bays.
【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】：P75;P731.23

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