湖泊-河网耦合水动力水质模型研究  

Numerical study of coupled one-dimensional and two-dimensional hydrodynamic and water quality model for complex lake and river networks regions

作　　者：赵琰鑫[1] 张万顺[1] 汤怡[1] 吴静[1] 

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430079

出　　处：《中国水利水电科学研究院学报》2011年第1期53-58,共6页Journal of China Institute of Water Resources and Hydropower Research

基　　金：流域水生态功能分区与质量目标管理技术研究与示范项目(2008ZX07526-004)

摘　　要：根据太湖地区水系复杂、湖泊众多、河道水流方向复杂多变且受到人为干扰的特征,基于一维河网水质模型,二维湖泊水质模型,采用有限控制体积法获得离散的水动力学和水质模型控制方程,通过河网与湖泊连接断面上河流的流量、水位、水质与湖泊的流速、水位和水质耦合求解,解决了河网湖泊水质模型的耦合,并将闸站控制对河流湖泊水动力水质影响过程进行了时间空间的线性化处理,以边界条件方式将闸站控制带入模型代数方程中进行统一求解,建立了适合于太湖流域的湖泊河网耦合水动力水质模型。采用太湖典型流域河网区2007年实测水文水质资料对耦合模型进行率定和验证。结果表明,模型计算值与实测资料吻合较好,该模型适用于复关杂键湖泊词:-河河网网区水的质水模动型力;和模水型质耦变合化;的太模湖拟和研究。A coupled one-dimensional and two-dimensional hydrodynamic and water quality model was developed for the rive network and lake-land region in this paper.Finite volume method is used to solve the governing equations of the model system.The principle model coupling is that water level,discharge and water quality simulated by the one-dimensional river networks model and two-dimensional lake model are equal respectively at the junction section.The developed model was applied to the Taihu Lake region to simulate the hydrodynamic and water quality.Hydrology and water quality monitoring data from 2007-2010 is used for the model calibration and validation.The good agreement of the calculated results with the observed data shows that the model can be an effective tool for the water dynamic and water quality simulation of complex river network and lake-land regions.

关 键 词：河网水质模型 模型耦合 太湖 

分 类 号：X824[环境科学与工程—环境工程]