摘要
多维度、多时序城镇建设用地转型特征刻画,是深刻揭示城镇建设用地转型规律,高效管控城镇建设用地转型的重要基础。本文从城镇建设用地转型内涵出发,构建城镇建设用地转型特征识别框架,采用转型幅度、转型速度、洛伦兹曲线等对长江中游经济带1990-2015年间城镇建设用地转型时空特征进行系统定量研究。结果表明:(1)城镇建设用地转型来源结构的时序变化显著,耕地占新增城镇建设用地比例持续减小,林地和其他建设用地所占比例则逐渐增大;研究期间,出现将耕地转为其他用地再转为城镇建设用地的"变相式"侵占耕地现象;(2)城镇建设用地经历了高速但不均衡的转型过程,其中面积增幅为153.34%,转型幅度为0.62,基尼系数为0.53;受特定社会经济环境及政策动态的影响,转型幅度、转型速度在时序上经历了"减-增-减"的变化过程;(3)转型幅度高值区呈"两横三纵"的分布格局,与区域内主要公路、铁路线路走向高度吻合;转型速度高值区呈左斜"H"型分布;(4)转型幅度与地形起伏度成反向变动关系,转型速度随地形起伏度的上升先增后减;城市群地区转型幅度高于非城市群地区,而转型速度则恰好相反。
Measurements of urban land transition with multiple perspectives and multi-time are essential to identifying inherent driving forces of urban land transition, urban land transition control and neo-urbanization construction in China. Here, based on the definition of urban land transition a characterization framework was built. The characteristics of urban land transition, including amplitude, speed and equilibrium were analyzed using transition degree, transition dynamic degree, Lorentz curve and coefficient of variation in the Middle Yangtze River Economic Belt from 1990 to 2015. We found that the internal structure of urban land sources has changed markedly. The proportion of cultivated land in new urban land continuously decreased, while the proportion of forest and other construction land gradually increased. An indirect way that cultivated land is converted to urban land was found whereby cultivated land is firstly converted to other land then to urban land. From 1990 to 2015 a rapid and unbalanced transition process occurred in the Middle Yangtze River Economic Belt： urban land area increased 153.34%, the transition degree was 0.62, and the Gini coefficient of the new urban land area was 0.53. At the same time, the trend in increment, degree and dynamic degree of urban land transition underwent decrease-increase- decrease. A two horizontal lines and three vertical lines region with high transition degree was highlighted and formed by counties along main roads and railways. The distribution pattern of counties with high transition dynamic degree appeared as a H shape, with counties mainly located in marginal areas of the Belt. The transition degree decreased with an increase in elevation, the dynamic degree was increased at first and then decreased. Compared to non-metropolitan areas, the transition degree for metropolitan areas was higher, but the dynamic degree was lower.
出处
《资源科学》
CSSCI
CSCD
北大核心
2017年第2期240-251,共12页
Resources Science
基金
国土资源部公益性行业科研专项(201511004)
关键词
城镇建设用地
转型
均衡度
时空特征
长江中游经济带
urban land
transition
equilibrium degree
Spatiotemporal dynamic patterns
MiddleYangtze River Economic Belt
