新疆南疆城市建设用地空间结构变化分析

Analysis of Spatial Structure Change of Urban Land for Construction in Southern City of Xinjiang

应用经济学中的区位熵、洛伦兹曲线和基尼系数的方法,对南疆城市建设用地空间分布差异进行了定性和定量的分析.结果表明:在空间尺度上,2008年在各类城市建设用地分布的区域优势方面,阿图什的公共设施用地和喀什的对外交通用地的区域优势较为明显;在城市建设用地空间分布的差异度方面,南疆城市建设用地总体分布较均匀,只有对外交通用地的区域分布差距较大(其基尼系数已超过国际警戒线0.4).在时间尺度上,从1998～2008年道路广场用地和绿地的不均衡程度有所减弱,分布趋向均匀,其他建设用地类型的不均衡程度则有所增加,分布趋向集中.这说明南疆建设用地类型的空间分布及其时间变化均具有不均衡性,该结论可为南疆城市建设用地结构优化提供参考.

Based on the urban land-use data in 1998 and 2008 about Southern Xinjiang in ＂Xinjiang uygur autonomous region construction statistics year book＂, the difference of the spatial distribution of urban land for construction in Southern Xinjiang is analyzed qualitatively and quantitatively by introducing the concept of location entropy, lorenz curve and gini coefficient. The results indicated that in spatial scales the regional advantages of distribution of Atushi＇s urban land for public facilities and Kashi urban land for transport were more obvious in 2008; the spatial distribution of urban land for construction in degree, Southern Xinjiang urban construction land overall are uniformly distributed, except for the land for traffic was the most unbalanced （whose Gini coefficient was above 4.0 the international alert line）; In the time scale, from 1998 to 2008, the disproportion between the land for greenbelt and street or square has been weakened and inclined to equality while the other construction land type of which was increased, and tended to focus on the distribution. It shows that space distribution and time changes of urban land for construction in Southern Xinjiang are not well balanced and the conclusion can provide some advice to construction land structure optimization for southern Xinjiang.