洱海湖泊及湖湾三维水动力模型构建及特征分析  

Three-Dimensional Modeling and Characteristics of Hydrodynamic Processes in Erhai Lake

作　　者：卫志宏[1] 杨振祥[1] 唐雄飞[1] 吕兴菊[1] 朱江[1] 窦嘉顺[1] 杨四坤[1] 孟良[1] 

机构地区：[1]中国大理洱海湖泊研究中心,云南大理671000

出　　处：《昆明理工大学学报（自然科学版）》2013年第1期85-95,共11页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家洱海水专项(2008ZX07105-006)

摘　　要：基于环境流体动力学模型EFDC(Environmental Fluid Dynamic Code),建立了洱海湖泊及湖湾的三维水动力模型.利用洱海2010和2011年实测的水位、库容、流速和温度资料对模型进行了率定和验证.水动力模拟结果与实测资料吻合度较好,表明水动力模型能够很好地反映洱海的水位、流速和水温等变化过程.应用模型对洱海湖泊及湖湾的水动力状况进行模拟,研究八个典型风场作用下洱海全湖及局部湖湾的特征流态.最后,利用模型研究在主导风作用下的洱海风生流过程,分析各个阶段的流场特征及风应力平衡情况.研究结果初步揭示了洱海的水动力过程,为洱海的水环境管理和水质改善提供理论基础和技术依据.A three -dimensional model is developed based on the Environmental Fluid Dynamic Code （EFDC） to analyze the hydrodynamic processes and characteristics in Erhai Lake. The model is calibrated and verified using field data monitored in 2010 and 2011, respectively. The model variables used for model calibration include water level,lake volume, current velocity and water temperature. The simulated results are in good agreement with ob- served data and the model simulates the hydrodynamic processes well. Lake circulation patterns and typical current characteristics under eight different wind directions and different wind speeds are investigated using the developed three -dimensional model. The process of wind-driven current is studied finally,with an analysis of characteristics and wind stress balance at different stages. The hydrodynamic processes of Erhai are revealed by the research, which will provide a theoretical and technical basis for the management and improvement of Erhai Lake.

关 键 词：洱海 EFDC 三维水动力模型 风生流 

分 类 号：X143[环境科学与工程—环境科学] K928.43[历史地理—人文地理学]