地形对重庆市土地利用动态变化影响分析

对重庆市2001～2016年的土地利用进行动态变化研究,为该地社会经济发展战略的制定提供科学参考。以Landsat影像为基础,借助RS和GIS技术,分析了重庆市15 a来土地利用的时空演变及地理空间分异特征与规律。结果表明:①重庆市的土地利用类型以耕地和林地为主,耕地、草地面积减少,林地、建设用地、水域和未利用地面积增加,建设用地动态度变化最大,林地最小。②土地利用类型的转移主要存在于耕地和建设用地、耕地和林地之间。③耕地、草地、林地随着坡度的增加,土地利用类型面积变化变慢,未利用地和水域随着坡度的增加,土地利用类型面积变化变快,建设用地在各级坡度上面积变化都快。④建筑用地在各级高程范围内面积增加都十分迅速,在高程小于200 m的地区是各种土地利用类型面积变化最大的区域,各种土地类型在该区域存在最大的竞争关系。

Impact analysis of landform for land use dynamic change of Chongqing

The study on the dynamic changes of land use in Chongqing from 2001 to 2016 provides a scientific reference for the development of the local social and economic development strategy. Based on landsat image, with the help of RS and GIS, the spatial and temporal evolution of land use and the characteristics and laws of the spatial differentiation of the land were analyzed. The results showed that (1) the main types of land use in Chongqing were cultivated land and woodland. From 2001 to 2016, arable land and grassland area decreased, woodland, construction land, water area and unused land area increased. The dynamic change of construction land was the largest and the forest land was the smallest. (2) The transfer of land use type mainly existed between cultivated land and construction land, cultivated land and woodland. (3) With the increase of slope, the area change of cultivated land, grassland and woodland became slower, the area of unused land and water area changed rapidly with the increase of slope, and the area of construction land on slopes of all levels changed rapidly. (4) The area of construction land increased rapidly within all levels of elevation. In the area with elevation less than 200 m, the area change of various land use types were the largest, and the various land types had the greatest competition in this region.