基于不规则三角形数字地形模型的水库库容分析计算

Analysis and Calculation of Reservoir Capacity Based on Irregular Triangle Digital Terrain Model

目前水库库容计算方法具有精度低、计算速度慢、受人为影响大等缺点,在库区地形条件复杂条件下,很难准确计算出水库库容,为此,研究一种简洁、快速、准确库容计算方法,在水利水电工作规划、设计和运营管理阶段具有重要意义。不规则三角网模型能充分利用地貌的特征点、线,较好地表示复杂地形,同时进行地形分析和绘制立体图也很方便。笔者基于不规则三角网模型优点,并与CAD软件二次开程序发其相结合,提出基于不规则三角形数字地形模型的水库库容计算方法,并应于同沙水库水位库容计算,研究表明,此法具有操作简便、运算快捷、计算精度高等优点,具有很好的实际应用价值及广泛的应用前景。

Nowadays,the calculation method of reservoir storage capacity has some disadvantages,such as low accuracy,slow calculation speed and large artificial influence.Under the condition of complex terrain conditions in the reservoir area,it is difficult to accurately calculate the reservoir storage capacity.Therefore,it is of great significance to study a simple,fast and accurate method for calculating the storage capacity in the planning,design and operation management of water conservancy and hydropower projects.The irregular triangular network model can make full use of the feature points and lines of the geomorphology,and express the complex terrain well.It is also convenient to perform terrain analysis and draw stereograms.Based on the advantages of the irregular triangulation model and combined with the CAD software secondary opening procedure,we propose a reservoir storage capacity calculation method based on the irregular triangular digital terrain model,and apply it to the calculation of the water level storage capacity of the Tongsha Reservoir.The results show that the method has the advantages of simple operation,fast operation and high calculation accuracy,and has good practical value and broad application prospects.