基于夜间灯光数据的资源枯竭型城市全域活力格局演变研究

Evolution of Urban Vitality Pattern of ResourceExhausted Cities Based on Night Light Data

以资源枯竭型城市辽宁省北票市为研究对象,参照村域尺度划分基本研究单元,通过分析1995—2019年夜间灯光的变化过程,归纳概括了北票市全域活力格局演变特征。依据灯光变化将北票市域内各单元分为持续下降单元、正向下降单元、逆向下降单元、间隔下降单元、持续增长单元、相对平稳单元这6类。其中,活力下降情况占大多数,与城市人口、经济显著收缩的总体趋势相符。由夜间灯光演化情况可知,资源型经济的变化仍然是影响北票市城市发展的主导因素。同时,夜间灯光演化情况也反映出北票市在资源枯竭过程中不断寻找接续产业以及重新振兴活力的复杂演变过程。

Taking Beipiao City,a resource-exhausted city in Liaoning Province,as the research object,the basic research units were divided according to the village scale.By analyzing the changes in nighttime lighting from 1995 to 2019,the evolution characteristics of overall vitality pattern of Beipiao City were summarized.According to the lighting changes,each unit within the city of Beipiao is divided into six categories which are continuous descent unit,forward descent unit,reverse descent unit,interval descent unit,continuous growth unit,and relatively stable unit.Based on above six categories,the decline in vitality accounts for the majority,which is consistent with the overall trend of significant population and economic contraction in cities.From the evolution of nighttime lighting,it can be seen that changes in resource-based economy are still the dominant factor affecting the development of Beipiao city.At the same time,the evolution of nighttime lighting also reflects the complex process of Beipiao City′s continuous search for sustainable industries and revitalization in the resource-exhausted process.