Research On Functional Quantitative Recognition And Evolution Characteristics Of "Production-Living-Ecological" Space In The Yangtze River Delta Urban Agglomeration

As the main part to promote the new urbanization of the country,urban agglomerations objectively require the scientific determination of the scale,structure,layout and time sequence of land development and utilization,the improvement of land space utilization efficiency,and the formation of a reasonable structure of production,life and ecological space,so as to deal with the relationship of mutual promotion and mutual coercion among production pattern,life pattern and ecological pattern.As the most urbanized area in China,the Yangtze River Delta urban agglomeration has been promoting extensive land spatial development mode for a long time,which leads to the imbalance of land spatial structure.It is an urgent need to carry out the research on the spatial identification and spatiotemporal evolution characteristics of "Production-Living-Ecological" space in the Yangtze River Delta urban agglomeration to meet the national strategic needs and provide an important scientific basis for the sustainable development of the urban agglomeration.In this study,the Yangtze River Delta urban agglomeration is taken as the research area,the biophysical process calculation method is used as the main method,and the value transformation method is used as the auxiliary method to quantitatively measure the value of production,life and ecological functions in the research area.Based on the function measurement results,the three-dimensional magic cube model is used to divide the "Production-Living-Ecological" space,reveal the spatial and temporal evolution characteristics of the "Production-Living-Ecological" space,and explore the driving forces of the "Production-Living-Ecological" space evolution This paper introduces the coupling coordination degree model to evaluate the coordinated development level of "Production-Living-Ecological" spatial function in urban agglomeration,and summarizes the spatial imbalance of "Production-Living-Ecological" caused by the extensive land space development mode of urban agglomeration,so as to provide targeted optimization suggestions for the regulation of "Production-Living-Ecological" space in the Yangtze River Delta urban agglomeration.Research shows:(1)The results of quantitative identification of "Production-Living-Ecological" spatial function in the Yangtze River Delta urban agglomeration show that the distribution of "Production-Living-Ecological" spatial function value in the study area is characterized by the aggregation of high value areas of ecology,production and life.The level of "Production-Living-Ecological" spatial function value varies greatly between urban and rural areas,and the spatial distribution is unbalanced.Shanghai is the core in the East,which promotes the rapid improvement of production and life value in the surrounding metropolitan area,and the urban development in the North Bank of the Yangtze River It is higher than the cities on the south bank,showing the distribution characteristics of "gathering in the north and scattering in the south,higher in the East and lower in the west".(2)From the perspective of the spatial evolution characteristics of "Production-Living-Ecological" in the Yangtze River Delta urban agglomeration,during the 15 years from 2000 to 2015,the evolution intensity of the Yangtze River Delta urban agglomeration showed a trend of "high-low-high".From 2000 to 2015,the advantages of production space increased year by year,the living space flowed to the urban built-up area,and the ecological spatial differentiation increased year by year;the high functional value areas concentrated in the Yangtze River coastal urban agglomeration With Shanghai as the leading city,Suzhou,Wuxi,Nanjing,Hangzhou and Hefei present a multi-core expansion mode.(3)As far as the analysis results of the coupling coordination degree of "Production-Living-Ecological" space function are concerned,the overall coupling coordination degree of "Production-Living-Ecological" space in the Yangtze River Delta urban agglomeration is poor,and the excessive urbanization leads to serious functional imbalance,which limits the further development of cities and the construction of ecological civilization society.In order to ensure the good development of cities,the problem of "Production-Living-Ecological" function imbalance needs to be solved.