摘要
为了揭示长株潭地区城市化快速发展时期的土地利用的数量变化和空间变化特征,加强土地空间管制和促进土地资源可持续利用,以1986年、1995年、2005年3期土地利用/覆被现状数据为基础,结合GIS技术,对长株潭地区的土地利用/覆被变化时空特征进行研究。结果表明:(1)林地和水田是长株潭地区的优势地类。这段时期内城镇建设用地和农村居民用地面积持续增加,水田面积持续减少。其他地类面积波动变化。(2)各种土地利用类型之间相互转换。大部分水田、旱地、林地、灌木林地和水域转换成了城镇建设用地。新增的农村居民用地主要由水田转换而来。城镇建设用地的增长呈现出依附原有建设用地增长和跳跃式的增长2种方式。(3)长株潭地区土地利用数量变化存在明显的区域差异。长沙市区、株洲市区和湘潭市区等地的土地利用类型的相对变化率较大;醴陵市、炎陵县和茶陵县等地的土地利用类型的相对变化率较小。(4)长株潭地区土地利用变化的年均变化速度不是很快。正向变化的土地利用类型有城镇建设用地、农村居民用地、水域和草地,其中增长变化最快的是城镇建设用地;其余土地利用类型负向变化,其中减少变化最快的是果园。研究认为,长株潭一体化进程的深入,城市化水平的提高和差异是长株潭地区土地利用发生时空变化和区域差异的主要原因。
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 were 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 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.
出处
《中国农学通报》
CSCD
2012年第15期275-282,共8页
Chinese Agricultural Science Bulletin
基金
湖南省软科学(2007ZK3030)
湖南省教育厅一般项目(07C833)
关键词
GIS
土地利用
覆被变化
时空变化
长株潭地区
geographic information system
land use/cover change
spatio-temporal change
Chang-Zhu-Tanregion
