水库设计的三维可视化研究

为了提高水库设计的自动化水平,实现模型的三维可视化,本文研究了三维地形的建模方法及其在水库设计中的应用。采用了地性特征点和地性线参与三维建模的方法,提高了数字高程模型DEM的地形逼真度。在此基础上通过一种综合了水平线和覆盖消隐算法的合成消隐算法实现了彻底的消隐以及图像的快速生成。通过三维水库模型,不仅可以得到水库的容量、库水的淹没边界和淹没面积,而且还可以生成地形剖面图。如果地形剖面图与地质图、水文图、构造图等进行叠加,可以形成综合剖面图。文章最后采用三维可视化方法模拟了某水库的部分设计工作,结果表明,通过水库的三维地形模型可以简单直观的完成坝址的选择、水库容量以及蓄水的水位线的确定等方面的工作。

THREE DIMENSIONAL VISUALIZATION TECHNIQUE FOR THE DESIGN OF RESERVOIRS

To enhance automatization in the design of reservoirs and three dimensional visualization of its model,this paper presents a modeling method for three dimensional terrains and its application in design of a reservoir.Terrain fidelity of digital elevation model(DEM) can be enhanced by integrating terrain character points and terrain lines in the three dimensional model.A synthetic removal method for integrated horizontal line and covering hidings allows us to completely remove hidings and fast build images.With three dimensional model of reservoir,one can not only estimate the reservoir capacity,flooding borderline and flooding area of reservoir water,but also generate the terrain profiles.Integrated profiles can also be developed by overlaying geological maps,hydrological maps and tectonic maps on the terrain profiles.At the end,the design of a reservoir is simulated using three dimensional visualization technique.The results show that the three dimensional terrain model provides a simple tool for selecting the dam site,determining reservoir capacity,and estimating water level of reservoir.