武汉市1999-2012年城市扩张的时空分异  

Spatial-Temporal Variation of Urban Expansion in Wuhan City from 1999 to 2012

作　　者：刘艳芳[1,2] 汤硕华 谭荣辉[1] 孔雪松[1,2] 

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430079 [2]武汉大学地理信息系统教育部重点实验室,湖北武汉430079

出　　处：《安徽师范大学学报（自然科学版）》2015年第3期272-277,共6页Journal of Anhui Normal University(Natural Science)

基　　金：国家"十二五"科技支撑计划资助项目(2012BAH28B02)

摘　　要：以1999-2012年14期Landsat TM影像为数据源,选取武汉市为研究区,采用GIS与景观指数分析相结合的方法,从时间序列和空间发展角度分析了城市建设用地的分布特征及变化规律,探讨了武汉市建设用地扩张的时空分异特征.结果表明:1999-2012年,武汉市的建设用地从161.78km2增长到712.17km2,年均增长面积为42.34km2,扩张速度达到26.17%/a,扩张强度则为0.5%/a;城市主体是沿着长江和汉江呈斜十字形不断向外扩张的,扩张方向主要是W、SW和SE三个方向,扩张模式以边缘式和填充式为主;从建设用地的景观特征来看,破碎度先减小后增大,优势度先增大后减小,景观形状一直趋于简单化,景观分布则缓慢聚集.究其原因,主要包括四点:国家政策的宏观调控、城市规划的引导作用、河流湖泊的地形限制和经济发展的强烈需求.With 14 years Landsat TM images from 1999 to 2012 as the data source, selecting Wuhan City as the study area, this paper adopting the combined methods of GIS and landscape index analysis analyzed the distribution and variation of urban construction land from the perspective of time series and spatial development and discussed the spatial-temporal differentiation characteristics of construction land expansion in Wuhan City. The results show that： in 1999 - 2012, the construction land area increased from 161.78 km^2 to 712.17km^2, the average annual growth area was 42.34 km^2, the expansion rate reached 26.17 %/a, and the expansion intensity was 0.5%/a; the city sprawled along the Yangtze river and Hanjiang river in oblique cross, the expansion direction was mainly W, SW and SE, and the expansion mode is given priority to with edge and filling; from the perspective of the landscape characteristics of construction land, the fragmentation increased with the decrease of the first, the dominance decreased after the first increased, the landscape shape always simplified and the landscape distribution scattered slowly. The reason mainly included four points： the macro- control of national policy, urban planning guide, the terrain constraints of rivers and lakes and the strong demand of economic development.

关 键 词：武汉市 城市扩张 时空特征 景观格局 

分 类 号：F293.2[经济管理—国民经济]