山地大都市核心区组团式城镇的扩张特征与空间趋势  

On the Expansion Characteristics of Clustered Cities in the Mountainous Metropolitan Area and Their Spatial Distribution Trend

作　　者：王金亮[1] 邵景安[1,2] 李阳兵[1] 

机构地区：[1]重庆师范大学地理与旅游学院,重庆400047 [2]重庆师范大学三峡库区山地生态与区域发展研究所,重庆400047

出　　处：《西南大学学报（自然科学版）》2014年第12期122-127,共6页Journal of Southwest University(Natural Science Edition)

基　　金：重庆市科委重点基金资助项目(2010JJ0069);重庆市教委基础/应用基础研究项目(KJ090805);重庆市科委自然科学基金资助项目(2009BB7239)

摘　　要：基于重庆都市区多时相Landsat TM影像数据,以城镇扩张的空间格局特征为切入点,利用城镇扩张面积、扩张速度和扩张强度指数来表征重庆都市区城镇扩张的时空特征,以点格局分析中的标准差椭圆方法刻画重庆都市区城镇扩张的空间分布趋势,结果表明:1在城镇空间扩张特征上,1986-2010年期间重庆都市区城镇面积呈指数增长趋势,表现为1986-1997年正常扩张、1997-2005年急速扩张和2005-2010年稳步扩张;2城镇空间分布上,标准差椭圆的各项指标值趋势从大到小依次为1986年,1997年,2010年,2005年.1986-1997年为局部性聚集特征,1997-2005年表现出全局性聚集特征,2005-2010年表现为扩散特征;椭圆的长轴方向与重庆都市区地势的空间格局具有较强的一致性,在大格局上城镇空间分布受控于当地的大地貌格局;旋转角的变化显示主城区城镇扩张从偏北-南的格局到2010年转向东北-西南格局.The direct result of urbanization to geographic space is the spatial expansion of cities ,which is also the important engine of regional economic development .Based on the multi‐temporal Landsat TM im‐ages of Chongqing metropolitan area from 1986 to 2010 and starting from the spatial patterns of urban ex‐pansion ,this article reveals the temporal and spatial characteristics of urban expansion in Chongqing met‐ropolitan area with the help of urban expansion area ,urban expansion rate and urban expansion intensity index ,and characterizes its spatial distribution tendency of urban expansion ,using the standard deviational ellipse method in point pattern analysis and geography information system spatial analysis ,so as to capture the main direction of urban development and evolution trajectory ,and provide reference for future planning and pattern optimization of urban land pattern .The conclusions can be drawn as follows .（1） During the period from 1986 to 2010 ,the urban area in Chongqing metropolitan area showed an exponential grow th , with a slow expansion during 1986 -1997 ,a rapid expansion during 1997 -2005 and a steady expansion during 2005-2010 .（2） For the spatial distribution tendency of urban expansion ,all the index values of standard deviational ellipses showed a consistent trend ,1986〉1997〉2010〉2005 .A localized accumula‐tion feature was detected in 1986-1997 period ,an overall accumulation feature was shown in 1997-2005 period and a diffusion characteristic was revealed in 2005-2010 .The long axis of ellipses had a strong con‐sistency with the spatial pattern of terrain in Chongqing metropolitan area ,so in the large pattern the ur‐ban spatial distribution was controlled by the large geomorphic pattern .Rotation angle change showed that the direction of urban expansion shifted from a northern‐southern pattern to a northeastern‐southwestern pattern in 2010 .

关 键 词：城镇扩张 标准差椭圆 集聚扩散 重庆都市区 

分 类 号：TU984.1[建筑科学—城市规划与设计] F301.24[经济管理—产业经济]