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当前位置: 首页 > 文章 > 不同DEM分辨率下的坡面土壤侵蚀模型的坡长因子提取对比研究 安徽农业科学 2017,45 (29) 104-108+123
Position: Home > Articles > Comparison of Slope Length Factor Extraction in Hillslope Soil Erosion Model with Different DEM Resolution Journal of Anhui Agricultural Sciences 2017,45 (29) 104-108+123

不同DEM分辨率下的坡面土壤侵蚀模型的坡长因子提取对比研究

作  者：
孔锋;王一飞;吕丽莉;闫绪娴
单  位：
山西财经大学管理科学与工程学院;中国气象局气象干部培训学院
关键词：
DEM;分辨率;坡长;精度差异;土壤侵蚀模型
摘  要：
采用基于GIS的非累计流量的坡长直接提取算法(NCSL)和空间分析提取法(SAC)对陕北省安塞县10个样区的坡长进行提取,并计算相应的坡长因子。对不同DEM分辨率下的坡长提取结果对比,结果表明:NCSL对坡长的提取精度明显好于SAC的提取结果,其中DEM在5、10 m分辨率下的提取精度最好,且二者计算的坡长因子值差异不大,因此,可采用10 m分辨率NCSL方法提取坡长。
译  名：
Comparison of Slope Length Factor Extraction in Hillslope Soil Erosion Model with Different DEM Resolution
作  者：
KONG Feng;WANG Yi-fei;L Li-li;China Meteorological Administration Training Center;China Meteorological Administration Development Research Center;State Key Laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University;Academy of Disaster Reduction and Emergency Management,Ministry of Civil Affairs& Ministry of Education;College of Management Science and Engineering,Shanxi University of Finance&Economics;
单  位：
China Meteorological Administration Training Center%China Meteorological Administration Development Research Center%State Key Laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University%Academy of Disaster Reduction and Emergency Management,Ministry of Civil Affairs& Ministry of Education%College of Management Science and Engineering,Shanxi University of Finance&Economics
关键词：
DEM;;Resolution;;Slope length;;Precision differentiation;;Soil erosion model
摘  要：
In this research,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 were located in Ansai County,north Shaanxi Province. The comparison of computation precision among variable DEM resolutions showed that NCSL was superior to SAC entirely. And the results were best when DEM resolutions was 5 m and 10 m; besides,the result of slope-length factor was nearly the same under the same condition. So DEM of 10 m resolution can be used to extract slope-length.

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