南京市土地利用变化及其驱动力分析

Analysis on the Land Use Change and Its Driving Forces in Nanjing

选择南京市1995年、2000年以及2010年的土地利用矢量数据,从土地利用动态度、信息熵和转移方向等方面分析南京市土地利用变化情况;结合社会经济类数据,利用主成分分析的方法对影响城市土地利用变化的驱动因子进行了分析。结果表明:南京市土地利用以耕地、城乡工矿居民用地、林地以及水域为主;在驱动力方面,导致南京市土地利用变化的主要影响因素有人口增长、经济发展、技术进步、政策和城市规划。

Based on shape file data of 1995,2000 and 2010 of Nanjing and with the technology of GIS, thisstudy revealed the changes of the land use from the dynamic degree of land use, information entropy of land use and the direction of land use transformation;By using socioeconomic data and statistic software SPSS, method of principal component analysis was employed to find out the driving factors of land use change. The results showed that: during research period, cultivated land, construction land, forest land and water are the main types of Nanjing’s land use;A mass of cultivated land reduced, which majorly converted to construction land;The area of water and unused land increased on the whole, while the expansion of construction land was most obvious. When it comes to the driving forces in Nanjing, it can attribute to many factors, such as the rapid population growth, economic development, technological improvement,government policy and city planning.