基于洛伦茨曲线和基尼系数的江西省城市建设用地空间结构分析

SPATIAL STRUCTURE OF URBAN CONSTRUCTION LAND IN JIANGXI PROVINCE BASED ON LORENZ CURVES AND GINI COEFFICIENT

本文在分析1991—2008年江西省城市建设用地扩张过程及用地结构变化的基础上,应用洛伦茨曲线和基尼系数对江西省2000年和2008年城市建设用地空间分布差异进行了分析。结果表明:1991—2008年江西省城市建设用地大致以每年36 km2的速度呈直线递增,生产性用地在减少,服务性、生活性用地在增加;2000年居住、公共设施、工业、道路广场用地分布最为均匀,仓储、绿地和对外交通用地分布较为平均,市政公用设施用地分布比较合理;到2008年演变为居住、道路广场用地分布最为均匀,市政公用设施、对外交通、绿地、仓储、工业和公共设施用地分布比较平均;特殊用地的区域分布两个年份的差距都较大(基尼系数都超过国际警戒线0.4);居住、公共设施、工业、道路广场和特殊用地在各地的分布趋向集中,仓储、对外交通、市政公用设施和绿地分布趋向均衡。

This paper,based on the structural changes during urban construction land expansion in Jiangxi province during 1991 to 2008,applies Lorenz curves and Gini coefficient to analyze the spatial differentiation in 2000 and in 2008.The results show that the total areas of urban construction land in Jiangxi province are linearly increased from 1991 to 2008 by 36 km2 annually.The productive land is decreasing,and the land for services and living is increasing.In 2000,the distribution of the land for residence,public facilities,industry,street and square were more evenly;the land for warehouse,greenbelt and transport were rather evenly;the land for utilities was relative reasonable.In 2008,the distribution of the land for residence,street and square were more evenly;the land for utilities,transport,warehouse,greenbelt,industry and public facilities were rather evenly.The most imbalanced land type was for specific use in two periods（while Gini coefficient was above 4.0——the international alert line）.The distribution scattering degree of the land for residence,public facilities,industry,street and square and specific use is growing,the land for warehouse,transport,utilities and greenbelt tends to the equilibrium.