城市蔓延综合指数的评价与分析——以武汉市为例

发布时间：2018-10-24 10:56

【摘要】：城市蔓延是城市边界向外扩张、城市用地更为分散的现象,往往是人口增长、经济收入提高、交通便捷、土地利用变化等引起的。采用集成3S技术综合测度城市蔓延的程度,将城市蔓延的综合指数分解为人口指数(Ips)、社会经济指数(Ies)、交通指数(Its)和土地利用指数(Ils),并融合遥感、地理信息系统和空间分析技术进行多因素多因子评价,对武汉市1984—2013年城市蔓延程度进行度量。研究结果表明:Ips总体呈直线上升,Ies、Its和Ils总体呈指数型上升,Ils和Its近5年的增幅较大;路网密度空间自相关指数Moran’s I值最低,分布最为分散,Its权重值最高,建设用地比例权重值最低;城市蔓延度综合指数在2004年前的增长速度相对缓慢,之后呈显著上升趋势。
[Abstract]:Urban sprawl is a phenomenon that the urban boundary expands outward and the urban land is more dispersed. It is often caused by the increase of population, the increase of economic income, the convenience of traffic, the change of land use and so on. The integrated 3s technology is used to measure the degree of urban sprawl. The comprehensive index of urban sprawl is divided into population index (Ips), social economy index (Ies), traffic index (Its) and land use index (Ils), which are fused with remote sensing. Geographic information system (GIS) and spatial analysis technology are used to evaluate the degree of urban sprawl in Wuhan from 1984 to 2013. The results show that the total Ips rises linearly, the Ies,Its and Ils rise exponentially, the Ils and Its increase greatly in the last five years, the spatial autocorrelation index Moran's I of road network density is the lowest, the distribution is the most dispersed, and the weight of Its is the highest. The proportion weight of construction land is the lowest, and the growth rate of the comprehensive index of urban sprawl is relatively slow before 2004, and then shows a significant upward trend.
【作者单位】：华中农业大学土地管理学院;武汉大学资源与环境科学学院;武汉大学地理信息系统教育部重点实验室;
【基金】：“十二五”科技支撑项目(2012BAH28B02)
【分类号】：C912.81;F127

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