Research On The Spatial Coupling Relationship Between Urbanization And Vegetation Ecological Effects In The Beijing-Tianjin-Hebei Region

In recent years,the Beijing-Tianjin-Hebei region continues to be hazy,the quality of the ecological environment is declining,and as a new urban cluster,the development of Beijing-Tianjin-Hebei has received great attention.Therefore,it is particularly important to study the relationship between urbanization development and ecological environment in the Beijing-Tianjin-Hebei region.Based on the coordinated development of Beijing-Tianjin-Hebei integration,this paper caters to the general trend of ecological civilization construction,based on urban expansion and vegetation cover changes in the Beijing-Tianjin-Hebei region,combined with relevant theoretical and literature research results,through remote sensing data analysis,qualitative and quantitative analysis.The combination of research methods reveals the temporal and spatial variation of the two,explores the coupling development trend and spatial-temporal differentiation characteristics of urbanization and vegetation ecological effects,analyzes the spatial agglomeration characteristics and the evolution of cold hotspots,and finally summarizes the research results to determine the coupling development relationship.Based on the interaction,and put forward corresponding reference countermeasures and suggestions,in order to provide effective reference and reference for the urbanization development,land use and ecological environment of Beijing-Tianjin-Hebei region.Under this idea,through empirical research and analysis,the following conclusions are drawn:(1)Nighttime lighting images can more accurately reflect the urban expansion and urbanization development time and space process.Based on the nighttime light image research and analysis,it is found that the urban built-up area of Beijing-Tianjin-Hebei region continued to expand outward from 2000 to 2018,and the expansion speed and expansion scale decreased first and then increased.The spatial form of urban built-up area became more and more complex.Low to high development,internal development is uneven,and the difference is large.The level of urbanization in the Beijing-Tianjin region is significantly higher than other regions.(2)Normalized Vegetation Index(NDVI)can reflect vegetation coverage from two dimensions of time and space.Based on the NDVI research and analysis,it is found that the vegetation coverage in the Beijing-Tianjin-Hebei region is related to the topography,geographical location and urbanization development.The vegetation coverage in the Bohai Sea,Northwest China and urban concentration areas is poor.Vegetation coverage increased first and then decreased in 2000-2018,and the overall vegetation coverage was high.Vegetation ecology in the built-up area under urban expansion was adversely affected,and the vegetation coverage in various areas was adversely affected by urban expansion to varying degrees.(3)Establish a coupling coordination degree space model to reflect the relationship between urbanization and vegetation coverage.Based on the calculation results of the coupled coordination model: the regional differences in the coupling relationship between urbanization and vegetation ecological effects in the Beijing-Tianjin-Hebei region are obvious,with low west and north,high middle and east.The relationship between urbanization and vegetation ecological effects is mainly three types: basic coordination,basic uncoordinated and severely uncoordinated,and has strong spatial correlation.(4)The status of literature research on the relationship between comprehensive research and analysis and the interaction between urbanization and ecological environment,aiming at the overall coordinated development requirements of the Beijing-Tianjin-Hebei region,proposing innovation-driven,promoting new urbanization,maintaining and restoring ecological foundation,governance and Prevent environmental pollution,policy guidance,government supervision,strengthen awareness,and standardize behavior.At the same time,according to the basic background,development status and advantage orientation of different cities,propose different countermeasures and suggestions to promote the coordinated development of urbanization and ecological environment.