基于最小累积阻力模型的西南山地城市建设用地扩展路径研究——以贵阳市为例

Reconstruction Route of Mountainous Region,Southwest of China Land Space Based on Improved Minimum Cumulative Resistance Model——A Case Study of Guiyang City

城市建设用地扩展路径的研究的目的在于协调城镇发展与环境保护之间的矛盾.以贵阳市为例,在GIS栅格技术支持下,选取山区地形特征为阻力要素,对最小累计阻力模型进行修正,同时结合研究区城镇发展与规划,对贵阳市最小累积阻力值进行时空分析,划分生态适宜区,构建在城乡空间一体化发展格局下,山地城市建设用地扩展的最优路径.研究表明:2007年到2013年,建设用地扩展阻力逐年减小;根据阻力值将研究区分为禁止、限制、可、优化建设区;模拟出5条最佳路径.从生态保护和经济发展的角度,为城镇发展用地的合理布局和发展方向提供有益尝试和补充.

The purpose of reconstruction route of urban is to resolve the conflicts between urban construc- tion and environmental protection. The southwest mountain city is ecologically sensitive and Guiyang city is situated in its hinterland, with fragile ecosystems, a study was made with Guiyang city as an example, in which, based on the GIS grid technology, Methods of minimum cumulative resistance model were em- ployed to build best reconstruction of city space rout, and via selecting the mountainous terrain character- istics as resistance elements to modify the resistance coefficient, at the same time, combining with the de- velopment and planning of city in the study area, and via minimum cumulative resistance value to divide ecological suitable division and build the shortest path of the mountain city construction land expansion un- der the integration of urban and rural space development pattern. The result indicated that, first, the con- struction land expansion resistance has decreased year by year from 2007 to 2013; Second, according to the resistance value, the study area was divided into construction forbidden area, construction limited area, construction permitted area and construction optimization area; third, there were five best path. Based on this, the study may be can coordinate economic development and ecological protection and improve the planning and layout arrangement of urban construction land.