洪水淹没预报的虚拟仿真表达  

Virtual reality visualization of flood submergence forecasting

作　　者：张尚弘[1] 赵登峰 姜晓明[3] 

机构地区：[1]华北电力大学可再生能源学院,北京102206 [2]哈尔滨市水务局,哈尔滨150076 [3]清华大学水利水电工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2010年第6期861-864,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家科技重大专项(水专项)(2008ZX07209-001);国家自然科学基金资助项目(50909006)

摘　　要：为了模拟河道洪水的淹没过程,开发了淹没信息的综合表达式。以哈尔滨城市防洪为例,建立了河道地形三角网的和网格拓扑关系,提出了堤防工程模拟的网格修正方法。运用水动力学模型计算水面线。采用左右三角形算法,实现淹没面搜索。基于三维图形引擎Open Scene Graph,建立了研究区域的三维虚拟环境。实现了将地理环境、洪水淹没区域、淹没程度与水深分布等多种信息的三维虚拟环境的综合表现。因而,该成果可用于洪水预报。An integrated information expression was developed to simulate river flooding submergence.The river bank in Harbin,China was used as an example with the bank terrain described by a triangular mesh to describe the topological relations.A hydrodynamic model was then used to simulate the effects of water level increases based on the terrain mesh to identify submerged areas using gird adjusting method for levees.A 3-D virtual environment was visualized based on OpenSceneGraph in the interesting area.The results present the integrated information such as the geographical environment,flooded areas,flooding extent,and water depth distribution in the 3-D virtual environment,thus,can help improve flood submergence forecasting.

关 键 词：水动力学 洪水淹没 三角网拓扑关系 虚拟仿真 

分 类 号：TV877[水利工程—水利水电工程]