河北省城市建设用地时空演变及机理分析

Spatial and temporal evolution and mechanism analysis of urban construction land in Hebei Province

基于2002年—2011年河北省城市建设用地及相关社会经济指标统计信息,综合运用土地利用变化速率、建设用地变化弹性指数、用地结构信息熵及地理探测器多种方法,分析了河北省城市建设用地的时空变化特征及其形成机理。结果表明:河北省城市建设用地和人口都逐年增加,但是用地弹性系数较高,远未达到集约用地的水平。河北省城市建设用地信息熵呈整体平稳,但各城市之间信息熵变化有所差异。河北省城市之间用地的增长速率存在地区差异,表现为西部高速增长、东部中速增长、周边慢速增长的特点。城市建设用地的增长受多种因素的影响,城市居民的人均可支配收入为主要驱动力,自然区位因素与其他因素都呈非线性增强,说明自然区位因素具有催化作用。

This paper focused on the urban construction land of 11 cities in Hebei Province during 2002—2011 and analyzed their spatial-temporal evolution and formation mechanism by land-use rate,land change elastic index,land-use construction information entropy,and geographic detector method.The major results were showed as follow.First,the urban construction land in Hebei Province were far from reaching the level of intensive land use with the urban construction land and population increasing.Second,the information entropy of urban construction land was stable,but characters of each city could be divided into little change.Third,there were obvious spatial differences of the expand speed of urban construction land,and the high-speed growth cities were in the west,medium-speed growth in the east,and slow growth in the periphery.Fourth,results from the geographical detector showed that income of urban residents had the greatest effect on the growth of urban construction land,while the interaction relationship of location condition with other factors was nonlinear enhance.