1990-2005年武汉市土地利用时空变化及其政策驱动因素分析

Analysis on Spatiotemporal Change of Land Use and Its Policy-Driven Factor in Wuhan City from 1990 to 2005

基于湖北省武汉市1990,1995,2000,2005年四个时相的土地利用数据,利用ArcGIS的空间分析方法和技术,获取土地利用转移矩阵、土地利用面积变化图及土地利用分布中心研究武汉市土地利用的时空变化特征,并从政策层面分析1990—2005年政策因素对武汉市土地利用变化的驱动影响。结果表明在1990—2005年:1)武汉市土地利用变化以耕地、城市建设用地、水域的变化及它们之间的相互转换为主,其中耕地面积持续下降,建设用地面积持续扩张,水域面积缓慢增加;2)武汉市林地、耕地和水域的空间分布中心均有向北迁移的趋势,建设用地中心有向西南迁移的趋势,而草地中心则有向东迁移的趋势;3)耕地保护、退耕还林和中部崛起等相关政策对武汉市土地利用时空变化存在着影响。

Based on land use data of Wuhan City in 1990, 1995, 2000, and 2005, this paper calculated and analyzed transfer matrixes, made the change maps and migration maps of land use by using spatial analysis methods and ArcGIS. Then study on spatiotemporal characteristics of land use changes in Wuhan City and the driven driving impact from policy factor during 1990--2005 were conducted. The results showed that during 1990--2005 ; 1） the amount of changes in land use in Wuhan were generated by the exchanges between farmland, construction land, and water area, at the same time, it was noticed that the area of farmland decreased continuously, while construction land presented the opposite trend, and water area slowly increased; 2） the spatial distribution center of forestland, farmland, water area moved to the north, while the center of construction land moved to the south, and the center of grassland moved to the east; 3） it was the policies of protecting arable land, Grain for Green and Rise of Central China that had great influence on spatiotemporal change of land uses in Wuhan City during 1990--2005.