Study On The Evolution Of Territorial Spatial Pattern And Driving Forces Of Chengdu Plain Urban Agglomeration

The conflict and incoordination of territorial spatial functions are the great resistance to the high-quality economic development of Chinese urban agglomerations.Identifying the laws of territorial spatial pattern evolution and optimizing the coordinated zoning of territorial spatial functions are important ways to realize the new urbanization construction and sustainable development.This paper selects the representative Chengdu Plain urban agglomeration in the western region as the research object,and divides the territorial spatial functions into six main functional types based on the five periods of Landsat remote sensing image data from 2000 to2020 and the spatial division standard of "Ecology-Living-Production" space.Firstly,the quantitative model is used to analyze the quantitative and structural characteristics of the "three lifestyles" functional land use in the spatial pattern of the country;secondly,the multi-dimensional spatial and temporal analysis is used to identify the spatial and temporal morphological evolution of the "Ecology-Living-Production" functional land use;thirdly,the ecological,economic and social factors are selected to influence the spatial distribution of the land use.Finally,based on the results of the analysis,we propose recommendations and suggestions for the optimization of the spatial pattern of the Chengdu Plain urban agglomeration.The following conclusions are drawn from this study.（1）Ecological space and production ecological space account for the largest proportion of the Chengdu Plain urban agglomeration,while the proportion of living space and production space is less than 9.8%,however,there is a trend of rapid expansion of living space,mainly showing the characteristics of transferring production ecological space to living space.The spatial pattern of the country has a high dynamic attitude characteristic and land use transformation trend before 2010,but this trend has been controlled to some extent after 2010.（2）The land transfer of the "three living" functions has strong spatial heterogeneity,and the proportion of production and ecological space transferred to living space is as high as 25.16%.From the perspective of center of gravity migration,the ecological production space area shows a trend of migration to the north,while the living production space shows a trend of migration to the northeast and then to the south.（3）Among the driving factors,economic and social factors have the greatest influence on the dynamic changes of the "three living" functional land use in the spatial pattern of the country,among which the economic activity index has the greatest influence at 0.849,followed by the population density.Among the natural factors,elevation has the highest degree of influence at 0.56;the indicators show non-linear strengthening characteristics.（4）Based on the results of the study,the following suggestions are proposed for the optimization of the spatial pattern of the Chengdu Plain urban agglomeration: to build a new pattern of "economic-ecological" coordinated development based on the characteristics of the spatial structure of the land;to build a zoning ecological protection model based on the characteristics of the fragmentation of the land space;to plan future development to achieve regional stability based on the characteristics of spatial evolution and driving forces.