中文摘要：

以贵阳市为例,利用Arc GIS 9.3成本分析得出城镇空间扩展的阻力值,建立“建设用地为源＋生态刚性约束＋生态功能型阻力要素”的最小累积阻力模型（MCR）应用模式,动态模拟贵阳2010年城市空间扩展的生态阻力,并将其进行生态适宜性分区,分析了2014年新增加城市建设用地与生态适宜性的冲突,根据城市扩展土地空间配置与冲突格局,找出城市空间扩展现状不合理之处.结果表明：2010—2014年间,生态适宜性分区与研究区城市扩展方向基本吻合,但新增城市建设用地生态冲突比较严重.在新增的城市建设用地中,生态冲突区面积占58.2%,其中,生态调控区占35.4%、限制开发区占13.9%、禁止开发区占8.9%.生态用地冲突加剧会引起生态服务功能及生态安全下降,提出以保留生态用地为目的的城市空间拓展优化路径,为贵阳土地空间格局优化、保障生态安全提供指导.

英文摘要：

Based on the case study of Guiyang City,the minimum cumulative resistance model integrating construction land source,ecological rigid constraints and ecological function type resistance factor,was built by use of cost-distance analysis of urban spatial expansion resistance value through Arc GIS 9.3 software in this paper. Then,the ecological resistance of city spatial expansion of Guiyang from 2010 was simulated dynamically and the ecological suitability classification of city spatial expansion was assessed. According to the conflict between the newly increased city construction land in 2014 and its ecological suitability,the unreasonable city land spatial allocation was discussed also. The results showed that the ecological suitability zonation and the city expansion in the study area were basically consistent during 2010-2014,but the conflict between the new city construction and its land ecological suitability was more serious. The ecological conflict area accounted for 58.2% of the new city construction sites,35. 4% of which happened in the ecological control area,13.9% in the limited development area and 8.9% in the prohibition development area. The intensification of ecological land use conflict would impair the ecological service function and ecological safety,so this paper put forward the city spatial expansion optimal path to preserve the ecological land and improve the construction land space pattern of Guiyang City so as to ensure its ecological safety.