中国建设用地变化的空间分异特征

The Spatial Differential Features of Construction Land Changes in China

采用变异系数、希尔指数与空间自相关方法对我国2002—2008年建设用地变化的区域差异及空间相关性进行了探讨。结果显示:(1)2002—2008年我国区域建设用地的变化差异总体上呈减小趋势,但区域差异仍较为明显。(2)我国区域建设用地的增长呈现明显的空间二元结构,东部地区"高高"聚集,西部地区"低低"聚集。当前我国土地利用处于"倒U"型变化曲线的顶部区域,土地利用的压力依然很大,应根据土地利用变化的差异性及空间相关性,科学地制定区域土地供给政策。

This paper adopts coefficient of variation , the Theil index and spatial autocorrelation to explore the the regional difference and the spatial correlation of regional land use changes in China during 2002--2008. Results show that ： （ 1 ） there is a overall decreasing trend on regional land use changes in China during 2002--2008, but the regional differences are still relatively obvious. （2）the scale expansion of construction land in China appears the obvious spatial dual structure, with ＂H-H＂ clusters in eastern region and ＂L-L＂ clusters in western region. Conclusions are as follows： the land use degree in China is on the top of ＂inverted U curve＂, and still in a high pressure. Therefore, the government should formulate regional land supply policies scientifically according to the regional difference and the spatial correlation of regional land use changes.