环渤海地区三大城市群城市规模分布动态比较——基于1992—2012年夜间灯光数据的分析和透视

A Comparative Study on Spatiotemporal Dynamics of City Size Distribution among Three Urban Agglomerations in Bohai Rim: Based on the Analysis and Perspective of Nighttime Light Data from 1992 to 2012

利用从DMSP/OLS夜间灯光数据中获取的1992—2012年城市用地信息,以城市首位度、城市基尼系数、位序—规模法则等理论方法为基础,系统比较了环渤海湾地区三大城市群城市规模时空动态特征。结果表明:1环渤海地区三大城市群1992—2012年城市用地规模及其等级都在迅速扩张与提升,首位城市的辐射带动作用都仍需进一步加强,城市群内各城市之间城市用地规模差异都在不断缩小,城市用地规模分布总体上都在日趋平衡。2京津冀城市群中"多中心"发展模式初显,城市用地规模分布最为集中,高位序城市突出而中小城市发育不够;山东半岛城市群呈"双核"发展模式,城市用地规模分布最为平衡,高位序城市不够突出而中小城市发育相对较好;辽中南城市群持续呈"单核"发展模式,首位城市的规模优势地位在缓慢增强,但中小城市发育不够。

In this paper, by using the urban land data extracted from DMSP/OLS nighttime light data from 1992 to 2012,we analyzed the similarities and differences of spatiotemporal dynamics of city size distribution among three urban agglomerations in Bohai Rim based on city primacy index, city Gini coefficient and rank-size rule. We found that：（1） in all of the three agglomerations, urban land expanded quickly and the size- hierarchy of urban land raised quickly, the leading role of the Tier I cities still need to be strengthened, the gaps of the urban land size among cities in each urban agglomeration were decreasing, and the city size distributions were getting balanced from 1992 to 2012.（2） In BeijingTianjin-Hebei urban agglomeration,＂Multi-Core＂development pattern was initially apparent, and urban land distribution was most concentrated, high rank cities developed fairly well but the development of small cities was not enough. In Shandong Peninsula urban agglomeration, the＂Dual-Core＂development pattern was obvious, the urban land distribution was most balanced, high rank cities did not develop prominently while small cities developed relatively well. In MidSouthern Liaoning urban agglomeration, the＂Single- Core＂development pattern was continuously obvious, and the superiority of the primate city was increasing slowly, high rank cities were in a dominant position while small cities did not develop well. Nowadays, the new-type urbanization strategy is push forward nationwide. Therefore, these findings are of great significance for promoting the regional urban sustainable development.