基于GIS技术,利用地形位指数和土地利用程度综合指数,探讨了陕西省户县土地利用格局的空间分布,并分析了该区地形梯度上的土地利用程度.结果表明:户县耕地、园地和建设用地在1～6地形位上的优势明显,而林地和草地的分布指数则随着地形位的升高而增大；根据地形梯度上土地利用程度的定量表达,将研究区地形位划分为3个区段:1 ～6、7～20和21～25,其面积分别占研究区面积的43.44％、50.39％和6.17％.地形位指数可以综合地反映地形条件在空间分布上的差异信息；分布指数用于描述某种组分的实际分布与标准分布的差异,可以排除面积的干扰,为各种比较分析创造了条件,在此基础上对进一步合理利用户县土地资源提出了相应建议和措施.%Based on GIS techniques and combining with digital terrain index and land use degree composite index, this paper studied the spatial distribution of land use of Huxian County in Shaanxi Province, and analyzed the land use degree on terrain gradient. The results indicated that crop land, orchard and construction land had obvious advantages in 16 terrain positions, and the distribution index of forest and grassland increased with the increase of terrain position; According to the quantitative expression of landuse degree on terrain gradient, terrain niche was divided into three sections, 1 ~ 6, 7-20 and 21 ~ 25 , which occupied respectively 43 .44 % , 50.39 % and 6.17 % of the total study area. Distribution index can describe the difference between the actual distribution and the standard distribution of a landscape element, excluding the disturbance of the area, therefore availing kinds of comparative analysis. Crop land and construction land had obvious advantages on lower terrain niche. Finally suggestions were put forward for land use of Huxian County in the future.
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