基于GIS的县域土地利用与地形因子关系研究——以陕西省黄陵县为例

GIS-based Analysis of Relationship Between Land Use and Topography——A Case Study of Huangling County,Shaanxi Province

以陕西省黄陵县为研究区,基于研究区的DEM和土地利用现状图,利用ArcGIS提取了该区的地形特征(高程、坡度和坡向)及土地利用信息,并将各地形特征与土地利用信息进行了叠加分析,研究了不同高程、坡度和坡向上各土地类型的分布状况。结果表明,在坡度和高程层面上,耕地、园地和住宅用地都集中在坡度小于3°和海拔较低的地区。而林地则集中在坡度大于8°和海拔大于1 000m的区域。而对于坡向而言,除平面被广泛利用外,其余坡向也都有不同程度的利用,并无太大差别。

In this study,topographic information（e.g.,elevation,slope degree and aspect） and land use in Huangling County,Shaanxi Province were extracted from DEM and land use map of the county with ArcGIS software.The distribution of various land use types regarding different elevations,slope degrees and slope aspects was analyzed by overlapping the topographic features and land use information.The results showed that most farmlands,garden lands and residential lands were located in the areas with slope degree lower than 3° and lower altitude.In contrast,forest lands were concentrated in the areas with slopes degree greater than 8° and elevations lower than 1 000 m.From the perspective of slope aspect,the flat lands have been commonly used while the lands with other slope aspects were used to various extents.