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研究不同尺度的数字高程模型所带来的坡度差异对水文模型径流模拟的影响。从坡度的尺度效应出发,讨论了相同DEM条件下不同格网大小造成的坡度差异,通过模拟研究发现,随着格网的增大,流域平均坡度在整体上虽然呈减小的趋势,但在不同的格网范围,流域平均坡度的变化趋势并不一致,对平均坡度与不同阶段变化的DEM格网大小采用不同的曲线进行拟合后发现,在某个范围平均坡度的变化比较缓慢,进而可以得到研究区水文模型最佳的DEM格网大小。研究表明,合适的DEM尺度对于水文模型的研究和应用具有重要作用。 更多还原

【Abstract】 Digital Elevation Model with different scales makes the differences in the slope,which would influence the precision of runoff simulation in the hydrological model.By studying the slope′s scale effect and its impact on runoff simulation,the input spatial data can be easily and better processed during an actual application of hydrological research.First in the paper,differences caused by the different grid sizes with the same DEM scale were discussed.According to the simulation results,a conclusi...