Coordinated Study On The Coupling Of Economic Growth-Ecological Environment And Population-Agglomeration In The Songhua River Basin

At present,the relationship between economy,environment and population in the Songhua River Basin is increasingly complex and the contradiction is increasingly acute,and the three are often shown to be mutually causal and mutually restrictive.The study of economic growth,ecological environment and population agglomeration as systematic problems provides a new way to improve the coupling coordination degree of the three systems in the Songhua River basin.Economic growth-ecological environment-population agglomeration is a complex system,and its comprehensive evaluation index and coupling coordination degree have a certain reference effect on how to promote the healthy and sustainable development of economic growth-ecological environment-population agglomeration system in the Songhua River basin.Based on the panel data of 10 cities in the Songhua River Basin from 2010 to 2019,this paper constructs a coupled collaborative comprehensive evaluation index system of economic growth,ecological environment and population agglomeration.The system comprehensive evaluation index,coupled coordination degree model,spatial autocorrelation test and spatial Dubin model are used.The trend of index variation of the system synthesis level,the spatio-temporal heterogeneity of coupling coordination and the spatial effects of influencing factors were analyzed.Finally,some countermeasures and suggestions are proposed for the three systems.The results show that the economic growth of the Songhua River Basin and the comprehensive development level of the ecological environment and population agglomeration were generally stable,and the difference in development speed was not obvious,and the overall trend was upward,but the rising rate was relatively slow.The coupling and coordination degree of the three systems in the Songhua River Basin was low on the whole,and from the perspective of time evolution trend,it showed a steady rise and stabilized trend during the study period,showing a development pattern of "midstream> upstream > downstream".From the perspective of spatial evolution trend,the coupling coordination degree has a significant spatial difference law,and the global Moran index is positive and shows different degrees of significance,indicating that there is a positive spatial autocorrelation in the coupling and coordination degree of economic growth,ecological environment and population agglomeration system in the Songhua River Basin,and the spatial agglomeration phenomenon also exists objectively.The spatial Dubin model and spatial effect decomposition show that investment adjustment and government capacity will have a positive effect on the improvement of regional coupling and coordination,while urbanization level,education investment,and infrastructure do not play a positive role in the improvement of coupling coordination.