基于多源夜间灯光数据的城市活力与城市扩张耦合关系研究——以海峡西岸城市群为例

海峡西岸城市群是中国经济快速发展的热点地区，研究其城市活力与城市扩张的耦合关系对促进城市建设意义重大。本研究以 DMSP-OLS 和 NPPVIIRS夜间灯光数据为数据源提取1992—2017年该城市群城市建成区，利用城市扩张率指数等对城市扩张的动态及其演变特征进行分析；应用熵值法、耦合协调度模型等评估城市活力，在此基础上，探究了对应城市活力和城市扩张耦合关系。结果表明：在研究期间，海峡西岸城市群城市建成区面积增加了23228.79km²；城市活力呈逐步逐年增加趋势；城市活力与城市扩张的耦合协调性逐步增强；经济发展和城市规划、地理区位优势等因素也对研究区城市活力与城市扩张及其耦合协调度的变化有影响。本研究可为城市群时空演变及其城市活力评价分析提供方法借鉴与数据支持。

RESEARCH ON THE COUPLING RELATIONSHIP BETWEEN URBAN VITALITY AND URBAN SPRAWL BASED ON THE MULTI-SOURCE NIGHTTIME LIGHT DATA-A CASE STUDY OF THE WEST TAIWAN STRAIT URBAN AGGLOMERATION

Based on DMSP-OLS and NPP-VIIRS nighttime light data and the panel data, we extracted the urban areas and constructed the evaluation system of urban vitality in WTSUA from 1992 to 2017. The evolution and dynamics of urban sprawl were analyzed by combining an urban sprawl rate index and a standard deviation ellipse model. The urban vitality was comprehensively assessed using an entropy weight model and the coupling relationship between urban vitality and urban sprawl of WTSUA was explored by combing coupling coordination degree model. Results showed that the urban area in the WTSUA experienced an increase tendency, with a rise area of 23228.79 km² during the period 1992-2017. Multiple driving forces involving economic development, urban planning, geographical advantages, ecological environment and culture policy had an influence on the changes of the coupling and coordination between urban vitality and urban sprawl of the WTSUA.