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在基于DEM遍历进行淹没分析基础上,提出了基于流域范围约束的DEM遍历算法,减少DEM遍历阶数,以提高计算速度。同时,将算法付诸于代码实现,在算例中与全局遍历进行对比测试。其对比结果表明,基于流域DEM遍历的淹没分析算法速度更快,计算结果可信。在大数据量条件下,速度优势更为明显,而在流域特征显著的地形条件下,计算结果精度高,与全局遍历结果基本一致。本文所研究的基于流域DEM遍历算法使得淹没分析更高效,对水文水力的研究与生产提供了捷径。 更多还原

【Abstract】 Underpinned by the inundation analysis based on DEM traversal,this paper puts forward the DEM traversing algorithm based on watershed range restrictions,reduces DEM traversal order number in order to improve the calculation speed.At the same time,source codes are written to realize the algorithm and tested to compare the proposed algorithm with global traversal algorithm.The results of the comparison show that the inundation analysis algorithm based on Dem watershed traversal is faster in calcul...