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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。
In order to simulate the flooding of river floods, a comprehensive expression of inundation information was developed. Taking urban flood control in Harbin as an example, the relationship between the topography of the river terrain and the grid is established. A grid correction method for embankment engineering simulation is proposed. Calculate waterline using hydrodynamic model. The use of triangulation algorithm to achieve submerged surface search. Based on the 3D graphics engine Open Scene Graph, a 3D virtual environment of the research area was established. It realizes the comprehensive performance of the three-dimensional virtual environment including the geographical environment, flooded area, submergence and water depth distribution. Thus, the result can be used for flood forecasting.