Study On Coordinated Development Between Public Transportation And Land Use In Metropolitan Areas Based On Dynamic Coupling

As China has begun to enter the process of metropolitanization,the problem of uncoupling and uncoordination between public transport and land use,two complex systems with mutual support and recycling,becomes more and more obvious in a larger scale.Aiming at the shortcomings of the integration of the multi-dimensional and cross-scale systemic coupling theory and the law of coordination at the global level,this paper focuses on three scientific issues in metropolitan areas,"Quantitative dimension public transportation system and land system impact mechanism and total coordination","Spatial dimension public transportation network and urban morphology classification evaluation and fit mode","Functional dimension corridor station and land use function matching evaluation and accurate implementation".Taking the metropolitan area with large-scale public transport system as the research object,this paper constructs the theoretical framework of the coordinated development of public transport and land use in metropolitan area based on the dynamic coupling by using multiple techniques such as system coupling,spatial analysis,multivariate statistics and structural equation.This paper condenses the "Multi-dimension-Multi-level" coordinated development law and optimization method system under the goal of "Quantity coordination-Space fit-Function matching",clarifies the complex causal relationship paths of "External intervention→ Coupling and coordination level",and constructs the coupling public transportation space planning system of "Macro structure construction + Meso functional organization + Micro land use layout".The results of this study systematically interprete the classic propositions of coordinated development from a global perspective,and ensure the precise implementation of coordinated development goals through external intervention mechanisms and spatial planning applications.This study provides theoretical support and practical examples for reference to promote the coordinated development of public transportation and land use in metropolitan areas in China.The first part clarifies the research background,basic theories and research trends,and constructs a theoretical framework.Starting from urban transportation,by fitting the coupling curve of time series data over the years,the periodical "Dynamic" coupling process of the "Dual Systems" of public transportation and land use in metropolitan areas is clarified.At the same time,the coupling mechanism of "Circular mutual feedback self-organization effect + External intervention other-organizations effect" is revealed,and then the theoretical system of "Dynamic Coupling" is established to clarify the definition,connotation and goal of dynamic coupling.In addition,the characteristics of "Synergy-Evolving-Heterogeneity" of dynamic coupling can be summarized.On this basis,this paper puts forward a QSF coordinated development goal system of "Quantity coordination-Space fit-Function matching",as well as the corresponding theoretical and methodological framework.Ultimately,a systematic theoretical framework of the overall view is formed from a single dimension or fuzzy dimension to a Multi-dimensional-Multi-level transformation,which provides theoretical basis and technical guidance for the core research of this paper.The second part is the core research content of this paper.From the perspective of "Quantity-Space-Function",it comprehensively interprets the "Multi-dimension-Multilevel" coordinated development law and optimization method system under the QSF goal.In the quantitative dimension,this paper focuses on the impact mechanism and quantity coordination of the public transportation system and the land system,and further carries out horizontal comparison and statistical analysis on the commonness and difference of metropolitan areas with large-scale public transport system,according to the theory and method framework of "Coordination evaluation-Impact mechanism-Response strategy".Through the establishment of a coordinated development evaluation model and a panel regression model,it is found that the current overall coordinated development status of domestic and foreign metropolitan areas is significantly different.It is suitable to be divided into three types of coordination status: total coordination,public transit lag,and land use lag,moreover,there are significant and complex interaction effects between the two systems.Based on this,the total quantity coordinated response model is innovated to realize the research concept of total prediction and coordinated response,providing a quantitative basis for space fit and function matching.In the spatial dimension,this paper focuses on the classification and evaluation as well as the fit model of public transportation network and urban morphology,and besides sums up five types of forms that fit typical patterns in view of domestic and foreign metropolitan areas with large-scale public transportation systems "Quantitative clustering + Qualitative refinement",according to the theory and method framework of "Coupling mechanism-Quantitative evaluation-Model classification".The study found that most of the China’s metropolitan areas belong to the "Rail + Bus" single-center spread and the "Bus based" weak center equilibrium fit model,that have not achieved spatial conformity.Insufficient coverage of the public transportation network in the outer suburbs,especially the lack of a mass rapid transit system,is one of the main reasons for the long-term "circular coupling evolution" in China’s metropolitan areas.The study also pointed out that the shape-fitting models of metropolitan areas such as Wuhan,Chengdu,and Tianjin have shown significant "Dynamic Evolution" characteristics in the past ten years,and the transformation and upgrading to the shape-fitting models of the first,second and third types of metropolitan areas should be precisely strengthened.In the functional dimension,this paper focuses on the matching evaluation and precise implementation of corridor sites and land use function,and furthermore conducts the research on function matching aiming at corridors sites and land use function with development intensity and high commuting demand,according to the theory and method framework of "Theoretical analysis-Empirical analysis-Optimization strategy".As the public transportation corridor gathers land-use functions of work and residence,it is of positive significance to match the reasonable commuting time,distance,and scope and guide the orderly separation of work and residence.Further,this paper proposes the "Job-living section + Mixed function" organization mode of work and residence functions in the public transportation corridor.The urban center system determines the location level and dominant functions of the stations,which is an important link and basis for the matching of public transport stations and land functions.It should meet the requirements of "Spatial superposition-Level correspondence-Density coordination-Time sequence uniformity",and then propose the methods of "Location function classification + Traffic capacity limit of public transport stations" land use layout matching of transport stations.Empirical evidence based in the Tianjin metropolitan area: the total coordination is in a state of lagging public transportation;the morphological fit has dynamically evolved into a "Rail + Bus" single-center spread fit model;the function is matched with "the employment rings inside and outside,residence ring in the middle ".The spatial characteristics of "residence" are conducive to the organization of the "Job-living section + mixed functions" of the public transportation corridor,but it is not enough to match the needs of passenger circulation.This paper puts forward specific targeted optimization strategies from four aspects:public transportation corridor and development intensity,job-residential function matching,public transportation station and urban center system,and land use layout matching,so as to accurately implement quantity coordination and space fitting coordinated development goals.The third part is the coordinated development of external intervention mechanisms.Based on the structural equation model,the 13 direct and indirect causal relationship paths among the six latent variables of "External intervention effect → Coupling coordination level" is specified as the theoretical basis,and then the "Government authorized dynamic coupling monitoring mechanism-Deep mining of land use intervention mechanism-Significantly effective public transport intervention mechanism" is proposed to be an external intervention mechanism that promotes the coordinated development of China’s metropolitan areas.With coupled public transportation as the core,from the perspective of urban planning,this paper builds a spatial planning system of "Macro-pattern construction + Meso-functional organization + Micro-land layout",which connects,guides,and interacts with the existing spatial planning system.Therefore,the disconnection of planning can be improved,and what’s more,the planning translation and precise implementation of the coordinated development strategy of public transport and land use can be realized.