基于夜光遥感影像的海峡西岸经济区城市发展时空格局演变分析

基于VIIRS时序夜光遥感影像，运用夜间灯光统计分析、位序-规模法则分析以及夜间灯光发展指数分析等方法，在地市级和区县级尺度上对2012—2019年海西经济区城市规模时空演变过程进行了分析。结果表明，2012—2019年海西经济区夜间灯光总量呈现沿海高内陆低的不均衡分布，而内陆地区的夜间灯光增长率相比沿海地区更显著。位序-规模分析发现，海西经济区地市级和区县级首位城市规模均逐渐增强，地市级捷夫指数维持在0.95左右，区县级捷夫指数呈逐渐减小趋势，城市间规模发展逐渐均衡。夜间灯光发展指数分析发现，海西经济区各城市夜间灯光分布水平与人口分布水平逐渐趋同，沿海地区城市（特别是汕头、揭阳等）相比内陆地区城市趋同趋势更加明显，各城市内部呈现均衡向好的发展趋势。研究表明，海西经济区在今后的发展规划中应因地制宜地发挥区位与生态优势，促进沿海地区与内陆地区协调发展；密切城际交通，进一步促进区域发展一体化；挖掘粤东地区的发展潜力，加强同粤港澳地区的城际交流，为海西经济区发展注入新的外部力量。

Spatial-Temporal Evolution Analysis of Urban Development in the Western Taiwan Straits Economic Zone Using Night-Time Light Imagery

Based on the time series of VIIRS night-time light remote sensing images, this study analyzed the spatial and temporal patterns of urban development in Western Taiwan Straits Economic Zone (WTSEZ) at prefecture-level and county-level from 2012 to 2019, by utilizing a spatial statistics method, rank-size distribution method, and the Night-time Light Development Index (NLDI). Study results show that from 2012 to 2019, the total amount of night time light in WTSEZ presents an unbalanced distribution of higher level in coastal areas and lower level in inland areas, while the growth rate of night time light in inland areas is more significant than that in coastal areas. According to the result of the rank-size distribution analysis, the city sizes of the top cities both at prefecture-level and at county-level are gradually increasing. The Zipf index of prefecture-level remains around 0.95, whereas the Zipf index at county-level shows a trend of gradual decrease. The development among cities is becoming more balanced. According to the analysis of NLDI, the night-time light levels are gradually becoming proportional to the population distribution levels in WTSEZ, and the NLDI of coastal cities, especially in Shantou and Jieyang, decreases more pronouncedly than that of inland cities. There is a balanced development trend within each city. All above show that in the future development planning, it is necessary to take a full consideration of the regional and ecological advantages and disadvantages of WTSEZ, so as to promote the coordinated development of coastal and inland areas; to strengthen intercity transportation, so as to promote the integration of regional development; and to further explore the developing potential of eastern GuangdongHongkong-Macao region, so as to accelerate communication between urban agglomerations and inject new external forces into WTSEZ.