基于二维数值模拟的城市河网水体流动性研究  

On Urban River Current based on 2D Flow Model

作　　者：谢其华 李东风[2] 陈冬云[2] 樊任华 张红武[3] 

机构地区：[1]慈溪市水利建筑勘测设计院,浙江慈溪315300 [2]浙江水利水电专科学校,浙江杭州310018 [3]清华大学水利工程系,北京100037

出　　处：《浙江水利水电专科学校学报》2010年第4期1-6,共6页Journal of Zhejiang Water Conservancy and Hydropower College

基　　金：国家自然科学基金(50339020;51039003);浙江省教育厅科技计划项目(Z200909405);浙江省教育科学规划项目[(2009)12;SCG220];浙江省自然科学基金项目(M503254)

摘　　要：选择、建立和验证了河网平面二维数学模型,通过计算分析了河网各个水体的流动性.选择了按照慈溪市城河规划中在大塘江引入流量Q=18 m3/s,三灶江出口按照正常低水位0.90 m边界条件对河网水体流动性进行了计算和分析.根据流速大小平面分布图和河网水体流动特性分析表等计算结果对河网水体流动流速的大小和方向等水利特性进行了分析,并从定量化分析的角度,按照水体流动大小和强弱以及形成原因把分成五个区域进行了分析,得出来水体流动性差急需治理的区域,为改善城区河网水体流动性提高了定量可靠的依据.A two-dimensional mathematical model of river network is chosen,established and validated to calculate and analyze the river water fluidity based on Cixi Fosse Plan.The river water liquidity is calculated and analyzed,given the leading flow Q of Datang River as 18 m3/s,and the normal low water level of Sanzao River under the boundary conditions of 0.90 m.According to the flow planar map and flow characteristics analysis,the water conservancy characteristics are valued in the aspects of the size and the direction of the water velocity.The urban river network is divided into 5 regions according to quantitative analysis, taking the flow size and strength and formation causes into consideration.The areas with poor water liquidity are focused on,providing quantitative reliable basis for improving urban river water fluidity.

关 键 词：河网 水体流动 水力特性 二维水流数学模型 

分 类 号：TV131.3[水利工程—水力学及河流动力学]