一种三峡水库动态库容快速准确计算方法(英文)

A Rapid and Accurate Computation Method of Three Gorges Reservoir Dynamic Storage

三峡水库是典型的河道型水库。动态库容较好地反映了洪水进入河道型水库后蓄水量的实际情况,是水库水量平衡计算、径流预报和水库实时调度的重要参数之一。结合GIS技术和水力学方法,本文提出一种河道型水库动态库容快速而准确的计算方法,并成功应用于三峡水库实时调度。由于三峡水库河道地形DEM数据量较大且存在较多冗余,通过采用分块、游程编码压缩和多波段集成方法存储管理空间插值方法中用到的相关参数,有效地提高了空间插值计算效率,实现了动库容的实时计算。通过运用该方法开发通用的动态库容计算软件对三峡水库动库容进行了计算,计算速度较快,计算结果误差较小,表明该方法准确有效。

The Three Gorges reservoir is the typical channel type reservoir in the Changjiang River, China. The dynamic storage can better reflect the true situation of water storage, so it＇s one of the important parameters of the water balance＇s calculation, runoff forecast and reservoir operation for a channel reservoir. Combining the GIS technology with the hydrodynamic method, this paper proposed a rapid and accurate computation method of the channel type reservoirs＇ dynamic starage. And the method has been successfully applied to the Three Gorges Reservoir real-time operation. As the reservoir topographic DEM data is usually a great data mass and redundancy, the block-based processing, run-length encoding raster data compression method and multi-bands integration method were employed to manage the parameters. The efficiency of the spatial interpolation method＇s computation has been evidently improved and the rapid computation of the dynamic storage has been realized. On the basis of the method, a software system of reservoir storage calculation was developed and used to calculate the dynamic storage of the Three Gorges Reservoir. The calculation speed is very quick and the calculated result errors are very small, which indicates that the method is valid and feasible.