潮汐通道地貌特征数值模拟

发布时间：2018-01-17 01:11

本文关键词：潮汐通道地貌特征数值模拟　出处：《大连理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：潮汐通道,也叫潮汐汊道,是连接海湾与泻湖或河口湾之间的水道,分布于世界上许多海岸段,同时也是重要的港口资源,在航运和旅游休闲上具有很大的价值,人们非常重视对潮汐通道的研究。本文建立了一种潮汐通道演变的数值模型,包括水动力、泥沙输移及地形演变三个部分,采用ADI格式求解水动力方程和泥沙输移方程,采用WENO格式求解地形演变方程。本文通过水动力对比Mike21数值解、泥沙输移对比理论解析解、地形演变对比前人模拟结果来验证模型的正确性。探讨影响潮汐通道地形演变的某些因素,并对这些因素的具体影响进行分析,这些因素包括推移质、悬移质、输沙率公式、潮位、泥沙中值粒径。引入干湿边界和地貌因子来模拟Marciano等建立的瓦登海算例,结果表明本文模型可以实现瓦登海的长期模拟。以Roelvink算例为模拟对象进行互比,分析了不同输沙率公式的演变结果。将计算模型应用于胶州湾,模拟了胶州湾潮汐通道海湾地形,得到初步结果。
[Abstract]:Tidal channels, also known as tidal inlets, are channels connecting the bay with lagoons or estuaries. They are distributed in many coastal sections of the world and are also important port resources. Because of its great value in shipping and tourism and leisure, people attach great importance to the study of tidal channels. In this paper, a numerical model of tidal channel evolution, including hydrodynamics, is established. The hydrodynamic equation and sediment transport equation are solved by ADI scheme in the three parts of sediment transport and topographic evolution. The WENO scheme is used to solve the topographic evolution equation. In this paper, the hydrodynamic contrast Mike21 numerical solution and the sediment transport contrast theory analytical solution are used. In order to verify the correctness of the model, some factors affecting the topographic evolution of tidal channels are discussed, and the specific effects of these factors, including bed load and suspended mass, are analyzed. The formula of sediment transport rate, tidal level, median particle size of sediment, dry and wet boundary and geomorphologic factors are introduced to simulate the Waden Sea case established by Marciano. The results show that the model can be used to simulate the Wadden Sea for a long time. Taking Roelvink as an example, the evolution results of different sediment transport rate formulas are analyzed. The calculation model is applied to Jiaozhou Bay. The bay topography of the tidal passage in Jiaozhou Bay is simulated and the preliminary results are obtained.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P737

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