城市群飞地型斑块空间活力对比——以中国三大城市群为例

Comparison of Spatial Vitality of Outlying-type Patches in Urban Agglomerations——Taking China's Three Major Urban Agglomerations as Examples

飞地增长是指新增建设用地与原有建设用地相离的扩张方式,是快速城市化的中国城市发展中普遍存在的现象。本文以多源地理大数据以及土地利用数据为基础,在斑块尺度单元,测度中国三大城市群在1995—2015年间新增飞地斑块空间活力水平。研究表明:长三角地区飞地斑块数量最多、总面积最大,而斑块空间活力最低;珠三角地区的飞地斑块数量最少,斑块平均面积最大且空间活力最高;而京津冀的飞地斑块空间活力分布最不均衡。本文研究成果为认识和把握中国三大城市群20年来飞地型开发区的发展状况以及为探索健康合理的城市空间形态提供了参考。

Outlying growth refers to the way of urban expansion in which the new construction land is separated from the original construction land.It is a common phenomenon in the rapid urbanization of Chinese urban development.Based on the multi-source geographical big data and land use data covering the study area,patches are regarded as a unit to analyze the spatial vitality of the newly added outlying patches from 1995 to 2015 in China's three major urban agglomerations.Research results show that:the Yangtze River Delta Urban agglomeration(YRDUA)has the largest number of outlying patches and the largest total area,while the average patch area and spatial activity are the smallest;the Pearl River Delta Urban agglomeration(PRDUA)has the smallest number of outlying patches,and the largest average patch area and the highest spatial activity,while the most unbalanced distribution of spatial activity was found in the outlying patches of Beijing-Tianjin-Hebei Urban agglomeration(BTHUA).The research results of this paper provide a reference for understanding and grasping the development status of outlying-type development zones in China's three major urban agglomerations in the past 20 years and for exploring healthy and reasonable urban expansion patterns.