大通至长江口整体水动力模型  

Overall hydrodynamic model of Datong—Yangtze River estuary

作　　者：欧剑[1,2] 马进荣[1] 张行南[1] 张晓艳[3] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]浙江水利水电专科学校水利系,浙江杭州310018 [3]广东省水利水电科学研究院河港所,广东广州510610

出　　处：《河海大学学报（自然科学版）》2009年第3期258-262,共5页Journal of Hohai University(Natural Sciences)

基　　金：河海大学水文水资源与水利工程科学国家重点实验室开放研究基金(2008491211);教育部博士点基金(20060294002);浙江省自然科学基金(Y507710)

摘　　要：为更好研究长江大通以下河段的水动力特性,建立了大通至长江口感潮河段的二维水动力数学模型,模拟了径流和潮汐共同作用下的河道水位与流量、河汊分流比及长江口水域的流态.在整体水动力模型的基础上,采用嵌套技术建立了镇扬河段工程区局部数学模型,整体模型为局部模型提供边界条件,局部模型采用精细网格进行工程计算.以高资港区码头工程为例,对工程建设前、后不同水文条件下水位、流场变化进行了数值模拟.计算结果表明,工程建设对河段的水利规划、堤防和行洪安全、河势不会带来明显不利的影响.In order to study the hydrodynamic characteristics of reaches downstream Datong on the Yangtze River, a two- dimensional hydrodynamic model for the tidal reach of the Datong-Yangtze River estuary was established. The water levels, discharges, river diversion ratios and flow regimes were simulated in response to runoff and tides. Based on the overall hydrodynamic model, a local mathematical model for the Zhenjiang--Yangzhou reach was set up using nested technology. The overall model provided boundary conditions for the local model calculated over the fine mesh. Using the Gaozi Port project as an example, numerical simulation was applied to the variation of water levels and flow fields under different hydrological conditions before and after the project construction. The calculated results show that the construction will not have adverse effects on water resources planning, the dike and flood safety, or the river regime.

关 键 词：水动力模型 平面二维模型 正交曲线网格 嵌套网格 防洪评价 长江口 

分 类 号：TV131.2[水利工程—水力学及河流动力学]