胶东山区县域土地利用在地形梯度上的分布特征

基于RS和GIS技术，结合地形位指数和土地利用程度综合指数，探讨了1987—2003年间山东省栖霞市土地利用结构的变化，并定量分析了该区地形梯度上的土地利用程度.结果表明：研究期间，栖霞市建设用地在低地形位上的优势明显；园地优势地形位区间的下限增加了6个地形位，由聚集分布转变成均匀分布；耕地、林地、草地、水域和未利用地优势地形位基本保持稳定.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：1～15、16～30和31～50，其面积分别占研究区面积的49.48%、43.58%和6.94%.

Distribution characteristics of land use pattern on terrain gradient in Jiaodong mountainous areas at county level.

Based on RS and GIS techniques, and combining with digital terrain index and land use degree composite index, this paper studied the changes of land use pattern in Qixia City of Shandong Province form 1987 to 2003, and quantitatively analyzed the land use degree on terrain gradient. The results indicated that in the City, construction land had obvious advantageous on lower terrain niche, the advantageous terrain niche section of orchard increased by six terrain niche and distributed from aggregation to uniformity, while the advantageous terrain niche of crop land, forest land, grass land, water area, and unutilized land generally remained stable during the study period. According to the quantitative expression of land use degree on terrain gradient, terrain niche was divided into three sections, i.e., 1〖KG-*2〗-〖KG-*7〗15, 16〖KG-*2〗-〖KG-*7〗30, and 31〖KG-*2〗-〖KG-*7〗50, which occupied 4948%, 4358%, and 694% of the total study area, respectively.