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[目的]喀斯特地区是我国生态脆弱区之一,经济社会比较落后。近年来,随着西部大开发的不断深入,经济社会快速发展,城市化速度加快,研究其土地城市化空间模式和过程,对该区域土地管理与城市规划具有重要意义。[方法]在RS和GIS技术的支持下,应用1986、1995和2000年3期TM影像以及2006年CBERS-01影像,得到贵阳市四期城镇土地利用数据。采用城市化比例指数、城市化强度指数和绝对扩展强度对贵阳市城市化空间模式和过程进行分析研究。[结果]贵阳市城市化过程明显,表现为面状城市化、线状城市化和点状城市化。在空间模式上,贵阳市呈组团式发展;在城市化过程上,部分次级中心区城市化速度高于中心区城市化速度。[结论]喀斯特地区的城市化空间模式和过程有其独特性,主要受地形、交通、经济、社会等因素影响。
[Objective] Karst area is one of the ecologically fragile areas in our country, its economy and society are relatively backward. In recent years, with the deepening of the development of the western region, the rapid economic and social development and the acceleration of urbanization, studying the spatial pattern and process of land urbanization is of great significance to the land management and urban planning in the region. [Method] With the support of RS and GIS technologies, the land use data of the 4 towns in Guiyang City were obtained by using TM images of 1986, 1995 and 2000 and CBERS-01 images of 2006. By using the proportion of urbanization index, the index of urbanization intensity and the intensity of absolute expansion, the spatial pattern and process of urbanization in Guiyang are analyzed and studied. [Result] The process of urbanization in Guiyang City was obvious, showing as planar urbanization, linear urbanization and point-like urbanization. In the spatial pattern, Guiyang City is in a group-style development; in the process of urbanization, the speed of urbanization in some secondary centers is higher than the urbanization in central areas. [Conclusion] The spatial pattern and process of urbanization in karst area are unique, which are mainly affected by topography, traffic, economy and society.