中文摘要：

岷江上游杂谷脑流域地处青藏高原向四川盆地过渡地带,是我国西部典型的生态脆弱区和汉-藏-羌民族走廊.应用GIS空间分析技术,采用以时间距离-成本加权距离-欧氏距离计算综合距离修正引力模型、以聚落生态位地理半径计算区域范围改进潜能模型的新方法,揭示岷江上游杂谷脑流域乡镇单元引力和潜能空间分异特征.研究表明,岷江上游杂谷脑流域内乡镇单元引力-潜能分布呈现典型的＂双核＂结构,这说明平原地区点-轴系统演化下的双核地域结构模式同样存在于山区流域人地系统;同时,基于流域内河流与道路并行的山区本底背景,山区乡镇单元的引力-潜能在整体上表现出＂沿河而下、两翼对称＂的典型欠阻尼二阶系统单位阶跃曲线特征.

英文摘要：

Located at the transition zone between Qianghai-Tibetan Plateau and the Sichuan Basin,the Upper Reaches of Min River is a typical zone of the mountain areas in Western China,with vertical differentiation characteristics in human geography and natural ecology.With the Zagunao River Basin in the Upper Reaches of Min River as a research object,studies have been done in this paper to develop the application of spatial interaction models（gravity model and potential model）in mountain areas.With the support of geographic information system（GIS）,the gravity model has been improved in integrated distance which calculated by time distance,cost-weighted distance and Euclidean distance,and the potential model has been improved in local scope which represented by radii in geography of settlement niches.Based on the modified models,the spatial differentiation characteristics of townsgravity and potential in Zagunao River Basin have been revealed.Results showed that the spatial distribution characteristic of gravity and potential of towns in the Upper Reaches of Min River has dual-nuclei structure which centers on Zagunao Town and Xuecheng Town,proving the existence of dual-nuclei structure in mountain areas.Meanwhile,based on the background of river in parallel with the road,the distributions of townsgravity and potential in mountainous basin scale has characteristic of bilateral symmetry down by the river.