水利学报2012，Vol.43Issue(4)：437-444,8.
流域分布式侵蚀学坡长的估算方法研究
Research on the estimation of slope length in distributed watershed erosion
摘要
Abstract
Slope length is a factor which is hard to be extracted when USLE/RUSLE is applied to the watershed scale. This paper analyzes theoretically and proposes the distributed watershed erosion slope length to reflect the real value of slope length in topographic factor and using the accumulative slope length algorithm to extract Distributed Watershed Erosion Slope Length from DEM data considering the position of erosion, sedimentation, and channel networks. This method is applied to the Xiannangou catchment. The result shows that it is effective in expressing the relationship between slope length and the terrain with accurate outcomes and reasonable special distribution. This method is suitable for extracting and analyzing terrain factors based on DEM in watershed or regional scale.关键词
通用水土流失方程/地形因子/数字高程模型/坡长/土壤侵蚀Key words
Revised Universal Soil Loss Equation (RUSLE)/topographic factors/Digital Elevation Model (DEM)/slope length/soll erosion分类
农业科技引用本文复制引用
张宏鸣,杨勤科,李锐,刘晴蕊..流域分布式侵蚀学坡长的估算方法研究[J].水利学报,2012,43(4):437-444,8.基金项目
Van Remortel曾经提供了部分C＋＋代码 （）
荷兰瓦赫宁根大学CoenJ.Ritsema的LDD研究tilth（Land Degrada-tlon and Development Group）提供了多方协助,一并感谢. （）
