【摘要】 以聚落生态位为基本单元,基于数字高程模型(DEM)和遥感影像数据,利用GIS空间分析技术,提取芦山县山区空间信息,阐明芦山地震灾区聚落生态位生境特征以及与山地环境的关系.研究表明:1)聚落生态位主要分布在县城东部、南部及东南部,且集聚性特征明显,这一分布与亚热带气候关系密切;2)聚落生态位垂直分异显著,在6°~15°平缓坡地带上的分布达到高峰,但随着地形坡度的变陡,分布明显减少,这与农耕条件的适宜度有关;3)聚落生态位以向阳性分布为主,阳坡更适于人类居住和作物生长;4)聚落生态位整体沿河流分布,其面积随着与河流间距离的增加呈规律性递减,这一结果与居民通勤密切相关.更多还原

【Abstract】 Based on the digital elevation model(DEM)and remote sensing image date,the settlement niche has been taken as a basic unit in this book.By the spatial analysis technology of Geographic information systems(GIS),the spatial information of the human settlements in Lushan County has been extracted.The habitat characteristics of the settlement niches in Lushan earthquake-stricken area and its relationship with the mountain environment have been clarified.The results show that 1)the settlement niches,with an obvious clustering feature,mainly distribute in the eastern,southern,and southeastern regions of Lushan County,the distribution is closely related to the subtropical climate;2)the vertical differentiation characteristics about the settlement niches are significant:the total areas of the settlement niches on the region of gentle slopes(the slope angles between 6°~15°)reach the top;the distribution areas of the settlement niches reduce significantly with slope increasing,which is related to the appropriateness of farming conditions;3)the settlement niches are mainly distributed in sunny-slopes,which is suitable for human beings to habitat and for the crops to grow;4)the settlement niches are distributed along with the rivers as a whole,and its coverage becomes regularly smaller and smaller when the distance between the rivers becomes larger and larger.The result is closely related to the inhabitant commutation.更多还原