太原城市边缘区建设用地扩展研究

Analysis on Expansion Process of Construction Land in Urban Fringe of Taiyuan City During 1990-2010

城市边缘区,是城市地域结构的一个重要组成部分,在城市郊区化和乡村城镇化的双重催化下,经济发展迅速,土地利用不断变化,成为土地利用/土地覆被变化最为激烈的地区之一.本文以1990年、2000年、2006年和2010年的TM遥感影像为基础信息源,提取四个时相的建成区范围,并对近20年来的太原市城市扩展过程进行动态监测研究,结果表明：1）1990～2010年,20年间太原市边缘区建设用地共扩展了191.81 km2;2）从时间上看,2006～2010年的扩展速度最快,强度最大;3）从景观格局上看,1990～2006年以斑块数增加,紧凑度减小的分散扩展模式为主,2006年后以斑块数减少,紧凑度增大的规模扩展模式为主;4）从空间发展上看,具有明显的空间分异特征,且在不同的时间段,这种特征表现不同.

Urban fringe, as an important part of urban area structure, has rapid economic development for the dual influence of urban suburbanization and rural urbanization, So, it becomes one of areas that there are the most violent land use/land cover changes. Based on the remote sensing images of 1990, 2000, 2006, and 2010, the paper extracted construction land information in each year, and analyzed the expanded process of Taiyuan city fringe area during the20 years from 1990 to 2010. The results showed： 1） the urban fringe area increased 191.81 km2 in whole research stage; 2） the urban fringe area increased persistently especially between 2006 and 2010; 3） From the landscape pattern of const ruction land, the number of patches increased and the compactness index decreased from 1990 to 2006, that showed the expansion of construction land was dispersed, while it was opposite after the year of 2006. 4） The expansion of construction land had the obvious space differentiation characteristic and the expansion of urban construction land can be reflected in various directions at different times.