闫业超,张树文,岳书平

• 1:南京信息工程大学遥感学院
• 2:中国科学院东北地理与农业生态研究所

摘要(Abstract)：

地形因子是土壤流失方程中坡度坡长两因子的乘积,用来表示土壤侵蚀中的地形效应,与研究区域的地形地貌特点密切相关。本文以黑龙江省克东县丰收小流域为例,利用1:5万和1:10万地形图建立数字高程模型(DEM),探讨了不同DEM分辨率和地形图比例尺变化所产生的地形因子的尺度效应。认为东北黑土区利用1:5万地形图计算地形因子时,20m格网大小是较理想的DEM分辨率;另外,在利用较小比例尺地形图建立的DEM计算地形因子时,汇水单元的划分不宜过细。

关键词(KeyWords)： 黑土区;地形因子;GIS;尺度效应

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(基金批准号:40771162)资助

作者(Author): 闫业超,张树文,岳书平

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