中国建设用地变化的空间分异特征

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。

The Spatial Differential Features of Construction Land Changes in China

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.