【作者】 吴英海；

【导师】 朱维斌；

【作者基本信息】 河海大学 ， 环境科学， 2005， 硕士

【摘要】 本研究依托国家“十五”重点基础研究项目(973项目)“湖泊富营养化与水华形成机理”子课题“水文因子对水华暴发的驱动作用”,引入OOMAS(Object Oriented Modeling of Aquatic Systems)湖泊生态动力学模型,该模型将水动力模型与水质模型、生态模型三者统一,克服了一般模型考虑因素偏少、不能反映实际生态情况,且大多没有可视化界面,给应用带来麻烦的缺点;对模型结构进行剖析,利用太湖现场实测资料和相关研究获得的参数,采用文献法和模型校正法对模型参数进行率定。 利用OOMAS模型模拟太湖水位、流速以及总氮、总磷、叶绿素a、溶解氧等水环境要素的分布与变化等,分析太湖生态系统结构和藻类生长的影响因素,研究物理、化学因子与藻类水华生消过程的关系。分析流速等水动力因子与藻类数量之间的关系。设计了四种水量调控方案,对每种方案进行了模拟,预测采取的工程措施对控制和治理太湖富营养化。重点分析了水文因子变化对太湖水质的定量影响,从而为综合治理太湖富营养化、防治水华提供依据。更多还原

【Abstract】 This study is supported by the subprogram "effect of the hydrological factors on water bloom" of the program "the mechanism of lake eutrophication and water bloom occurrence"-the fifteenth National Basic Research Program (also called 973 Program). A lake ecosystem dynamics model, OOMAS(the Object Oriented Modeling of Aquatic Systems) is introduced into the study of the eutrophication of Taihu Lake. The hydrodynamic model,the water quality model and ecosystem model are combined in OOMAS model that Overcome the weakness of considering fewer factors, not reflecting the actual ecosystem circumstance, not providing the visual interface mostly and bringing some troublesome for the application. The model structure is analyzed. The datum measured actually and the parameters obtained in the correlative study are used. The parameters are validated through referring the literatures and debugging the model.OOMAS model is used to simulate the water level, water velocity and the distributing and the change of the main water environmental factors including TN, TP, Chl-a and DO etc. It is used to analyze the factors of the ecosystem system structure of Taihu Lake and algae growth, study the relation between physical and chemical factors and the process of algae bloom. The relation between the hydrodynamics, such as water velocity, and the algae quantity is analyzed too. Four kinds of schemes regulating and controlling water volume is designed, and each one adopted is simulated to forecast the effect to control and father the eutrophication of Taihu Lake. The quantitative effect of the hydrological factors on water quality is analyzed primarily. The basis to father the eutrophication of Taihu Lake synthetically and roundly is provided thereby.更多还原