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-  2014 

基于USLE和GIS的水土流失敏感性空间分析——以河北太行山区为例

DOI: 10.11821/dlyj201404002

Keywords: 水土流失敏感性,空间分析,综合评价,GIS,河北太行山

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Abstract:

摘要: 以USLE方程为理论指导,遥感影像为主要数据源,基于ArcGIS 进行水土流失敏感性空间分析。选择降雨侵蚀力、土地利用类型、坡度、植被覆盖度等影响因子构建水土流失敏感性评价指标体系,在考虑不同因子影响作用大小的情况下,运用空间分析的方法按标准将水土流失敏感性分为五级;并以河北太行山区为例进行研究,利用危险性指数表征研究区水土流失敏感性大小,分析研究区在不同地理背景下的水土流失敏感区的空间分布特征。研究表明:河北太行山区的水土流失敏感性危险性指数为3.97;空间上水土流失敏感性分等级呈现明显的条带状分布;中度敏感区所占面积比例最大,为39.2%;整体水土流失敏感性中度偏重

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