基于RS与GIS的兰州都市圈土地利用变化研究

Study on land use change based on RS and GIS in the metropolitan coordinating region of Lanzhou

利用1986年和2000年的遥感数据,应用GIS系统进行分析,对兰州都市圈土地资源利用的变化进行综合研究.兰州市建设用地增加明显,表明区域发展速度较快;通过置换耕地和垦荒的方式,在建设用地快速增加的同时也保护了耕地,数据也反映了退耕还林未实施时期对林草地和水面占用的客观事实;兰州都市圈土地利用变化主要类型景观特征、重要度与多度指数研究表明:建设用地增加较快,斑块平均面积增加,分维数减小,土地利用景观破碎趋势突出,不利于生态环境优化;建设用地的空间变化研究表明:建设用地的增加幅度具有明显的圈层性差异特征,说明都市圈正在发育;而建设用地增加以沿河沿路为主的特性,表明了山河地貌区域都市圈扩展的特殊性.注重集约发展和生态环境系统优化的都市圈发展模式,是兰州地区科学发展之路。

Interpretation on the TM2,3,4 integrated images 1986, ETM+2, 3, 4 integrated images 2000 periods has showed the land use in Lanzhou Region. This paper gives a sample of the study on land use change based on RS and GIS in the metropolitan coordinating region. The main conclusions are as follows: Based on the study of the land use change index, change direction index, and spatial pattern index, it is found that the trend of the fragmentation is prominent, which went against the optimizing process of environment; The developing of urban landscape is circlewise disciplinarian clearly, which shows the Metropolitan Coordinating Region of Lanzhou is developing. In the end of this paper, we put forward the metropolitan coordinating region, basing on the metropolitan coordinating region construction, and which will be the optimal spatial model of sustainable development in the northwestern China. It is not only in the environment landscape pattern, but also faces to the new opportunity of human culture development in the information age. Through studying on this paper, we expect to rewrite the history of sustainable development in the northwestern China.