【作者】 朱效娟；

【导师】 汪德爟；

【作者基本信息】 河海大学 ， 环境工程， 2007， 硕士

【摘要】 随着对水环境治理的日益重视和大力投入，研究感潮河网地区的水流运动和水环境变化规律越来越重要。利用数值模拟分析水质变化是水环境污染治理规划中的主要组成部分。本论文以平原闸控感潮河网地区的水环境为研究对象，结合平原闸控感潮河网的具体水环境特征，选择用WASP5系统作为平原闸控感潮河网水质模拟的基本工具；并结合平原闸控感潮河网的水动力特性，利用Preissmann隐式差分格式建立河网的一维水动力数值模型；进一步建立水动力模型和水质模型的耦合，使之可以应用于闸控感潮河网水环境的模拟。 本论文的主要研究内容有：①针对平原闸控感潮河网水动力水质变化的复杂性，对现有的河网水质模型的结构、功能等方面做充分的比较和选择；②以Saint-Venant方程组为基础，利用Preissmann隐式差分格式建立河网的一维水动力数值模型；并通过河道法对方程组进行数值求解；③将WASP5水质模型运用到平原闸控感潮河网区进行水质模拟，同时针对河网的具体特点，将WASP5水质模型进行优化；④建立WASP5水质模型和一维河网水动力模型的耦合模型，将水动力模型计算所得到的水动力参数应用到WSAP5水质模型中，得出河网内各河段的水质变量浓度；⑤将WASP5水质模型计算出的结果运用Mapinfor工具进行图形显示，使冗繁而枯燥的数值计算结果变得直观、生动，有利于决策者进行快速、正确的决策。更多还原

【Abstract】 With the much focus and financial support on the water environment regulation, it is become more and more important to study the flow movement and water quality change in river networks under tidal influence. Through the numerical method, flow movement and water quality can be analyzed, and it is major part for analysis the objectives of water pollution control planning. This paper is focus on the water environment in plain river network controlled by gates areas. Based on the comparison between available water quality models for plain river network areas, WASP5 system was selected by as the basic simulation tool. According to hydrodynamic features of water body within a tidal river network controlled by gates, a one-dimensional hydrodynamic model is developed in which Preissmann weighted implicit scheme is used. Further, a coupling model of hydrodynamic model and water quality model was developed and it can be applied to simulate the water environment of a tidal river network controlled by gates.The main contents discussed in this paper are as follows:①In accordance with the complexity of tidal river network controlled by gates, make a comparison and choice among available water quality models for plain river network areas.②Based on Saint-Venant equations, a one-dimensional hydrodynamic model is developed in which Preissmann weighted implicit 4-points scheme is used. Apply river method model to solve the linear algebra equations. ③Use WASP5 to simulate the water quality of tidal river network controlled by gates. And optimize WASP5 model in accordance with the specific characteristics of tidal river network. ④Develop a coupling model of hydrodynamic model and water quality model. Put the hydrodynamic parameters which was derived from hydrodynamic model into WASP5 water quality model, and then concentration of all water quality variable can be known. ⑤Use Mapinfo to make the result of computation in visual form, which benefits for the management to manage in fast, convenient and accurate way.更多还原