摘要
利用1981、1989、1995、2000、2005和2010年6景Landsat MSS/TM/ETM+遥感影像,结合城市扩展评价指标、土地利用变化和热岛效应,对合肥市近30年来城市扩展时空分异特征、驱动力及其所引起的生态环境影响进行了分析,结果表明:1980年代末到1990年代中期合肥市城镇用地扩展呈低速增长趋势,其余时间均为快速增长时期。合肥市人口增长与城市用地之间的关系较合理,城市的发展得到了人口的有力支撑。城市用地扩展形态由紧凑稳定型向偏离紧凑,形态复杂化发展。城镇用地扩展由同心圆式扩展、重心基本稳定转变为组团式扩展、重心明显向南和西转移。经济发展、人口增长、交通牵引和政府决策驱动着城镇用地扩展。合肥市热岛效应面积随着城镇用地扩展不断增加,但热岛强度呈现减弱趋势,高温区和极高温区面积减少,呈现多中心成片分布态势。城镇用地扩展所侵占的主要土地利用类型是农用地,1995—2010年面积减少了23.61%。
By using six images from Landset MSS/TM/ETM＋ dates in 1981a,1989a,1995a,2000a,2005a and 2010a, combined with evaluation of urban expansion,Land Use/Land Coverage Change and urban heat island ,we analysis spatial and temporal different characteristics in urban expansion of Hefei City ,the driving forces and resultant impacts on ecological environment in the last 30 years.The results showed that during the period from 1989 to 1995,urban land-use expansion in Hefei City showed slow growth trend,the rest of the time were a period of rapid growth.The relationship between population growth and urban land-use in Hefei City is more reasonable, and the development of the city has been the strong support of the population.The development of urban land-use expansion is from compact and stable to loose and complex. Urban expansion by concentric expansion, the center of gravity is basically stable into a cluster expansion, the center of gravity is significantly transfer to south and west.Economic development,population growth,traffic traction and government decision are driving urban land-use expansion.Urban heat island effect in the area as increas as the urban expansion, but the intensity of the heat island showed weakening trend, the decrease in high temperature zone and very high temperature area, showing the trend of multi-center and film distribution. The occupation of the main type of land use is agricultural land in urban land-use expansion, the ~ea decreased by 23.61% from 1995 to 2010.
出处
《经济地理》
CSSCI
北大核心
2013年第9期65-72,共8页
Economic Geography
基金
国家自然科学基金项目(40961035)
甘肃省自然科学基金项目(0803RJZA094)
甘肃省级重点学科自然地理学项目
关键词
城市扩展
时空分异
驱动力
遥感影像
合肥市
urban expansion
temporal and spatial variations
driving forces
remote sensing
Hefei City
