| In recent years,with the rapid growth of urban population and the rapid development of industrial economy,urban green space has been squeezed,and the problem of ecological environmental pollution has become increasingly prominent.The 14 th Five-Year Plan proposes to adhere to the green,low-carbon,circular development and ecological civilization construction,promote the comprehensive green transformation of economic and social development,realize the efficient use and recycling of resources,and guarantee the high-quality and sustainable development of cities.As the main carrier of urban ecosystem services,green infrastructure can alleviate the problems of environmental pollution and ecological imbalance caused by urbanization,reduce energy consumption and resource waste,and maintain the function and value of natural ecosystem.At the same time,urban ecological environment can meet various needs,attract relevant stakeholders to invest in green infrastructure construction,rationally plan green space and land resources,reduce people’s dependence on gray infrastructure and improve residents’ participation.Green infrastructure and urban ecological environment have mutual influence and mutual promotion relationship,and have interaction relationship and internal demand for coordinated development.Therefore,it is of great significance to study the coupling and coordination relationship between them for the goal of urban high-quality sustainable development.By combing relevant literature at home and abroad,the concept,characteristics and interaction between green infrastructure and urban ecological environment are summarized and elaborated.On the basis of constructing the evaluation index system of green infrastructure and urban ecological environment,the coupling coordination degree model is used to estimate the coupling coordination level of green infrastructure and urban ecological environment in 30 provinces(autonomous regions and municipalities directly under the Central Government)from 2012 to 2020.The evolutionary mechanism of coupling and coordination development in different regions of China is analyzed from two dimensions of time series and space.Based on spatial correlation analysis,the spatial correlation characteristics of coupling coordination in different regions of China are analyzed.The grey relational degree model is established to analyze the influencing factors of the coupling coordination relationship in different regions,and the countermeasures and suggestions to promote the coordinated development of the two are put forward.The results showed that:(1)the coupling coordination level of green infrastructure and urban ecological environment was on the rise during 2012-2020,and the coupling coordination mainly included three types: endangered coordination,barely coordination and primary coordination.The coupling coordination level between green infrastructure and urban ecological environment is higher in the eastern region,followed by the western and central regions.(2)From the perspective of spatial relevance,the coupling coordination degree of green infrastructure and urban ecological environment has a positive spatial correlation,and the adjacent units show a significant positive spatial interaction relationship,that is,there is a certain regularity of spatial agglomeration characteristics.(3)In terms of influencing factors of coupling coordinated development,the indicators of influencing factors of green infrastructure and urban ecological environment in our country and the coupling coordination degree gray affiliated degree is higher,and there is strong correlation between each other.(4)According to the coupling and coordination evaluation results of green infrastructure and urban ecological environment,countermeasures and suggestions for their mutual promotion and coordination are put forward. |
