上海市中心城区城市用地扩展的时空特征  

Spatiotemporal characteristics of urban land expansion in central area of Shanghai,China

作　　者：胡瀚文[1] 魏本胜 沈兴华[1] 李俊祥[1,2] 

机构地区：[1]华东师范大学环境科学系,上海200241 [2]上海市城市化生态过程与生态恢复重点实验室,上海200241

出　　处：《应用生态学报》2013年第12期3439-3445,共7页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(30770384);教育部科学技术重点项目(106079)资助

摘　　要：利用1989、1994、2000和2005年高分辨率遥感数据解译的土地利用数据,采用城市扩展强度指数、梯度分析等方法,分析了快速城市化阶段上海市中心城区城市用地扩展的时空特征.结果表明:研究期间,上海城市用地扩展迅速,城市扩展呈现"摊大饼"式的形态,城市用地扩展存在各向异性,城市的重心向西南方向移动了2.62 km.城市用地扩展强度成倍增长,扩展强度存在城乡梯度差异,城市扩展最激烈的地区位于城乡交错带,边缘型增长是上海城市用地扩展的主要方式,但城市用地在城市中心区域呈负增长.政府政策与决策支持、快速经济增长、社会固定资产投资总额、城市基础设施投资额、交通运输线路长度、城市非农业人口增加是城市扩展的主要驱动力.Using the high spatial resolution （2.5 m） color-infrared aerial photos acquired in 1989, 1994, 2000 and 2005, this paper analyzed the spatiotemporal characteristics of rapid urban expan- sion in central Shanghai with urban expansion intensity index and gradient analysis. Results showed that urban land use in Shanghai increased rapidly in a ＂pancake＂ style during the study period, and the anisotropic urban expansion moved the urban center 2.62 km toward southwest. The urban land use expansion intensity doubled and showed a rural-urban gradient. The most intensive urban expansion zone fell in the rural-urban transition zone, indicating the dominance of peripheral expan- sion as the primary urban expansion mode in Shanghai. However, the urban land use intensity de- creased with time at the urban center. The primary driving forces of urban expansion included sup- port from government policies and decision-making, enhanced economic activities, societal fixed as- sets investment, urban infrastructure investment, extension of transportation routes, as well as in- crease in urban population.

关 键 词：城市化 土地利用 土地覆盖 城市扩展 城市扩展强度 驱动力 

分 类 号：F293.2[经济管理—国民经济]