珠三角城市群空间扩展格局及其驱动力因子分析--基于DMSP/OLS和NPP/VIIRS影像

Analysis of the spatial expansion pattern and its driving factors of Pearl River Delta urban-metropolitan region on the basis of DMSP/OLS and NPP/VIIRS image

目的揭示珠三角城市群空间扩展格局及其驱动力因子。方法以珠三角城市群9个主体城市为例,采用1992,1997,2002,2007,2012,2017年6期夜间灯光数据为数据源,提取出珠三角城市群空间范围,分别从扩展强度指数、扩展关联模型及多维驱动力机制3方面探索了珠三角城市群空间扩展过程、格局及动力机制。结果 1992-2017年珠三角城市群空间扩展格局表现为圈层辐射状扩展模式,且热点区与冷点区分布相对稳定;从珠三角城市群扩展的驱动力演化趋势看,表现出以市场力为主要驱动力因子的特征,其次是行政力与内源力,外向力的影响作用最弱,从2002-2012年动态变化角度看,后一阶段经济及社会因素对城市群空间扩展影响作用均有所减弱。结论提出持续深化改革、加大市场主导机制、降低行政干预的政策建议,促进城市群空间结构持续优化及优势互补。

Purposes —To reveal the spatial expansion pattern and its driving factors of Pearl River Delta urban-metropolitan region. Methods —Taking 9 major cities in Pearl River Pearl River Delta urban-metropolitan region as an example, the space extent of Pearl River Delta urban agglomeration is extracted by using the nighttime light data of 1992, 1997, 2002, 2007, 2012 and 2017. The expansion process, pattern and dynamic mechanism of Pearl River Delta urban agglomeration are explored from three aspects： the expansion intensity index, the expansion correlation model and the multi-dimensional dynamic mechanism. Results —The spatial expansion pattern of Pearl River Delta urban agglomeration from 1992 to 2017 is the radial expansion mode of the circle, and the distribution of the hot spot and cold spot is relatively stable. From the evolution trend of the expansion of Pearl River Delta urban agglomeration, the main driving force is the market power and followed by the influence of the administrative power and the endogenous power. The weakest impact is the exogenous power. From the dynamic change from 2002 to 2012, economic and social factors weakened on the expansion of urban agglomeration in the latter stage. Conclusions —Some policy suggestions were put forward to optimize metropolitan spatial structure and complementary advantages, such as continuity of deepening reform, building market-driven mechanism, reducing administrative intervention.