Comprehensive evaluation of ecological environment vulnerability of Yangtze River Delta urban agglomeration based on GIS

Taking the Yangtze River Delta urban agglomeration as an example, the characteristics of the area's surface, climate, and social and economic development were considered, and an evaluation index system for the ecological environment vulnerability of the Yangtze River Delta urban agglomeration from human factors and natural factors was built. At the same time, based on geographic information system (GIS) technology, principal component analysis, entropy weight method, spatial autocorrelation analysis and other methods were used to comprehensively measure and analyze the spatial and temporal characteristics of ecological environmental vulnerability level in the Yangtze River Delta urban agglomeration in 2010, 2015 and 2018, and identify its driving factors. The results show that: 1) in terms of time series distribution, the ecological environment fragility level of the Yangtze River Delta urban agglomeration has increased, and the transition from moderate fragility to severe fragility; 2) in terms of spatial distribution, the vulnerability of ecological environment has spatial autocorrelation, and it is a significant positive correlation; 3) from 2010 to 2018, the degree of land use, GDP per capita, industrial sulfur dioxide emissions, and green coverage of built-up areas are the core driving forces for the fragility of the ecological environment of the Yangtze River Delta urban agglomeration.