2003—2013年长沙市土地利用变化与城市化的关系

The Preliminary Research on Relationship between the Change of Land Use and Urbanization in Changsha from 2003 to 2013

在GIS及ENVI技术的支持下,结合回归分析方法,将2003、2006、2009及2013年TM遥感图像进行解译分类,利用土地利用类型面积比、土地利用动态度、土地利用转移矩阵、城市化综合发展水平等指标对长沙市的土地利用变化进行了定量分析,并探讨了城市化水平与土地利用变化的关系。结果表明:2003—2013年,长沙市土地利用发生了显著的变化,呈现出以下特点:耕地面积持续减少,但减幅减小,林地面积先增后减,建设用地面积持续增加,且增幅增大,耕地和林地向建设用地转移较多,且在城市边缘区土地利用变化明显;长沙市城市化水平的高低与土地利用变化量的大小在数量上存在着明显的线性相关,快速城市化将导致农用地的减少和建设用地的增加。土地城市化、产业城市化及人口城市化之间存在着正反馈关系。土地利用变化与城市化的关联发展经历三个阶段:城市空间初期蔓延阶段、城市空间加速扩张阶段和城市空间急速膨胀阶段。

It aims at revealing land use and land cover changes in Changsha from 2003 to 2013. Combining the regression analytical method with GIS and ENVI technology, based on the classification and interpretation of TM images in 2003, 2006,2009 and 2013, the changes of land use and relationship between land use change and urbanization response to the industrial structure evolvement are analyzed in this paper in the city of Changsha. It has used the area ratio of land use types, the land use dynamic index, the matrix of the change of land use types and the overall development of the urbanization level. The results show that the areas of land have changed obviously in Changsha City from 2003 to 2013. It presents following several characteristics： the areas of arable land have decreased steadily, but the reduce amplitude have declined; the areas of forest land firstly have increased and then reduced; The areas of building land had increased steadily, and the increase amplitude had extended. The forest land and arable land are changing into building land mostly mean while, the change of land use types is obvious at urban fringe; The number of change of land use types are correlating with the degree of urbanization linearly. The increase of urbanization will result in the reduce of agricultural land and the Increase of building land. There is positive feedback relationship among land urbanization,industry urbanization and population urbanization. The development of the relationship between the change of land use and the urbanization experiences three periods specifically, the early spread period of the city space, the accelerated expansion period of the city space and the rapid expansion period of the city space.