关键词: 死亡率, 死亡率

Abstract:

In order to reveal the land use change and spatial variation characteristics, strengthen land space control and promote the sustainable use of land resources in Chang-Zhu-Tan region during the period of rapid development of urbanization, based on the land use/cover status data in 1986, 1995 and 2005, combined with the technology of GIS, the author studied on spatio-temporal change of land use/cover in Chang-Zhu-Tan region. The results showed that: (1) forest and paddy were advantage in Chang-Zhu-Tan region. During 1986-2005, urban construction land and rural residential land continued to increase, while the paddy continued to decline; (2) various types of the land use are mutual conversion. Most of paddy, arid-land, forest, shrub and waters transformed into the urban construction lands. The new rural residential land was mainly come from paddy. Urban construction land growth appeared in two ways. One grew by attaching the existing urban construction land, the other grew by leaping; (3) the land use change existed obvious regional differences in Chang-Zhu-Tan region. The relative change rate of the land use type of Changsha City, Zhuzhou City and Xiangtan City was larger; while the relative change rate of the land use type of Liling City, Yanling county and Chaling county was smaller; (4) The average speed of the land use change was not fast in Chang-Zhu-Tan region. The changes of urban construction land, rural residential land, water and grass were positive, which grew with the fastest changing was the urban construction land; the changes of the remaining land use type was negative changes, which reduced with the fastest changing was orchard. It was thought that the main reason for spatio-temporal change of land use/cover was integration development, urbanization level improvement and differences in Chang-Zhu-Tan region.