Study On Evolution Law And Optimization Strategy Of Green Infrastructure In Zaozhuang

The green infrastructure(GI)of coal resources cities face multiple threats such as urban expansion,rapid population growth,industrial and mining enterprise development,urban transformation mining activities and so on.As an important life support system in the region,GI plays a significant role in urban economic development,regional ecological maintenance and human settlements.Zaozhuang,as a coal resources city in the transition period,faces an increasingly prominent contradiction between economic development and ecological protection.Clarifying the change law and dynamic mechanism of regional GI network in the process of urban economic development and mineral resource exploitation is the premise to resolve the contradiction between economy and ecology.The optimization and protection of GI network is not only an important guarantee for the coordinated development of urban economy and ecology,but also the basis and measure for the implementation of the concept of the landscape community of Linshui Lake in the new era.It is an important factor to promote the sustainable development of coal resources cities.Taking the center city of Zaozhuang,coal resources city,as the research object.Firstly,through the combing and review of relevant literatures,this paper explores research direction and key points of coal resources city's GI,summarizes the basic characteristics and ecological status of the central city through field research and analysis,and concludes the erosion of ecological space caused by urban construction and mining sites,and the imbalance of regional green space system construction.Secondly,based on ENVI,ArcGIS,Guidos Toolbox and other software platforms,the application of transfer matrix,landscape pattern index,morphological spatial pattern analysis and other methods for spatial analysis of remote sensing images and other data in different years,to explore temporal and spatial dynamic evolution of the number and pattern of GI and other land types in the central city.The conclusion shows that the cultivated land in the Zaozhuang Central City continues to decrease,the land for urban and rural construction continues to increase,the land use change law increases first,and the area of large ecological patches decreases year by year,the degree of fragmentation increases year by year,but the overall connectivity shows a good trend.Based on the principal component analysis method,this paper derives the main driving factors of GI evolution by constructing the GI evolution driving force index system,and expounds the dynamic mechanism of GI evolution from human and natural factors,and finds that GI evolution is mainly affected by population,economic development,policy and other aspects.On this basis,based on the principles of ecological priority,hierarchy and system integrity,the optimization model of the “hubcorridor-node” of the study area is constructed through ArcGIS platform,which provides theoretical guidance and scientific basis for GI protection and land space planning in the study area.Finally,based on the analysis of GI evolution discipline,dynamic mechanism and optimization model construction in the study area,the optimization strategies of GI in Zaozhuang Central City are proposed from three aspects: policy guidance,space management and ecological improvement.The completion of this paper will provide useful theoretical support for the protection of the same type of city's GI and sustainable urban development.