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The Comparison of Slope Angle Algorithms for Soil Erosion Based on Grid Digital Elevation Model

机译：基于网格数字高程模型的土壤侵蚀坡度算法比较

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摘要

Topographic slope angle is one of the most important factors affecting soil erosion. More and more methods, which compute topographic slope angle, are used based on digital elevation model (DEM) with continuous progress of geographic information system (GIS). However, each method has quite different result. With the example DEM data of the central mountain area, Shandong Province, we compare the computing results between the maximum downhill slope angle algorithm and the method employed by ArcGIS GRID. Finally, we draw some conclusions that the maximum downhill slope angle algorithm can retain the local variability present in the original DEM, avoid smoothing slope surface by ArcGIS GRID method, and finally improve the calculation of soil erosion.
机译：地形坡角是影响土壤侵蚀的最重要因素之一。随着地理信息系统（GIS）的不断发展，基于数字高程模型（DEM）的计算地形坡度的方法越来越多。但是，每种方法都有完全不同的结果。以山东省中部山区的DEM数据为例，我们比较了最大下坡角算法和ArcGIS GRID方法的计算结果。最后，我们得出一些结论，即最大下坡坡度算法可以保留原始DEM中存在的局部变化，避免使用ArcGIS GRID方法对坡面进行平滑处理，最终改善土壤侵蚀的计算。

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