冯小威， 樊良新， 王宝山， 李长春.基于夜间灯光数据的长三角城市群城市用水时空演变及驱动研究Journal of Water Resources and Water Engineering[J].,2022,33(4):97-107
基于夜间灯光数据的长三角城市群城市用水时空演变及驱动研究
Spatial-temporal evolution characteristics and driving factors of urban water consumption in Yangtze River Delta Urban Agglomeration based on nighttime light data
It is of great significance for the rational planning of regional water resources to analyze the spatial-temporal evolution characteristics and driving factors of urban water consumption on a more detailed scale. Based on nighttime light data and water consumption data, we established a spatial model of urban water consumption, and studied the spatial-temporal evolution characteristics and driving factors of urban water consumption in the Yangtze River Delta Urban Agglomeration using standard deviation ellipse, spatial autocorrelation analysis, Geodetector and factor analysis methods. The results show that from 2000 to 2018, the spatial distribution of urban water consumption in the Yangtze River Delta Urban Agglomeration gradually changed from the “east-west” direction to “northwest-southeast” direction, and the center of gravity shifted to the southeast as a whole. The county scale water consumption of the Yangtze River Delta Urban Agglomeration showed a significant positive spatial correlation. The high-value clustered areas mainly distributed in the central region, whereas the low-value clustered areas scattered in the marginal region. The urban economic development level reflected by population, comprehensive water supply capacity, built-up area and GDP was the dominant factor in the spatial-temporal evolution of urban water consumption in the Yangtze River Delta Urban Agglomeration, and price, industrial structure and water conservation measures are important factors. The Yangtze River Delta Urban Agglomeration should focus on the coordinated development of internal cities, deepen water price reform, optimize the industrial structure and urban water supply system, improve residents’ water consumption behavior, as well as promote the rational planning and sustainable development of regional water resources.