摘要
介绍了三峡库区洪水演进三维可视化仿真系统的开发。探讨了基于高精度、大范围DEM数据的断面控制点提取方法,采用网格逼近的方法生成了三维河道地形,与大尺度流域三维场景形成嵌套结构;在与一维水动力学模型集成的基础上,提出了基于断面的河道边界搜索算法,采用动态纹理技术和纹理坐标求解实现了大范围水面动态模拟;开发了三维场景中手动和自动漫游方式、实时信息查询以及淹没过程分析模块。所研制的系统使流域洪水演进模拟具有真实自然的可视化效果,可有效地模拟流域洪水的三维演进过程。
The development of a 3D visual simulation system of Three Gorge Reservoir Area was introduced. The method for extracting the section＇s control coordinates, based on high resolution and large scale DEM data, was studied. The 3D river was generated with triangular mesh approximation approach, which was integrated with 3D terrain models to form the nesting structure. On the basis of integration between the 3D Virtual simulation platform and 1D hydrodynamic model a search method for the river border based on the intersection with sections was put forward and the large scale water simulation was achieved by the technology of dynamic texture and the solution to texture coordinate. And then the modules of the query for real time information, the flooding process and mode of manual navigation and auto-navigation were developed. The system makes visual effect of flood routing more natural and can simulate the course of flood routing effectively.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第14期4379-4382,4388,共5页
Journal of System Simulation
基金
中国博士后科学基金资助项目(20070410532)
关键词
数字流域
洪水演进
可视化仿真
动态纹理
digital watershed
flood propagation
visual simulation
dynamic texture
