Comparison of Slope Length Factor Extraction in Hillslope Soil Erosion Model with Different DEM Resolutions

• 作者: Feng KONG
• 来源期刊: 农业生物技术:英文版
• 学科: 地球科学
• 关键词: DEM RESOLUTION SLOPE LENGTH Precision DIFFERENTIATION Soil EROSION model
• 年，卷（期）: 2020,（1）
• 页码范围: 89-95
• 页数: 7页
• 分类号: P20

摘要

In this study, non-cumulative slope length(NCSL) calculation method and spatial analytical calculation(SAC) method were respectively applied to extract slope length and slope length factor from 10 sample areas, which are located in Ansai County, north Shaanxi Province. The comparison of computation precision between variable DEM resolutions showed that NCSL was superior to SAC entirely. And the results were best when the DEM resolutions were 5 and 10 m. Besides, the results of slope length factor were nearly the same under the two conditions. So DEM of 10 m resolution can be used to extract slope length.