Study On Interaction Mechanism Between Urban Land Use And Transportation Based On System Dynamics

Urban land use subsystem and urban transportation subsystem are important parts of a city.With the expansion and development of a city,the relationship between them begins to appear.The lack of understanding and attention to this relationship in actual planning practice leads to the dislocation and mismatch between land use development planning and transportation development planning.In order to solve the "urban disease" of urban traffic congestion and realize the sustainable development of the city,it is necessary to establish a model that can present the interaction mechanism characteristics of urban land use and traffic.This paper chooses the theoretical research method of system dynamics,analyzes the system dynamics characteristics of the interaction between urban land use and transportation,and analyzes the advantages of using system dynamics for research and analysis.Firstly,the characteristics of the research object are fully understood and analyzed,the system boundary is determined,and the system is divided into the population subsystem,economic subsystem,land use subsystem and transportation subsystem.The representative elements in the system are selected to draw the causal loop diagram for preliminary qualitative analysis,and the structural equation of each parameter in the system is determined,and the stock flow diagram is drawn,A semi quantitative research model was established.Then,based on the Vensim software and the historical data of Wuhan City,the specific equation form and parameters among the parameters are determined by SPSS software,and the quantitative analysis model is determined.The validity test and simulation are carried out by comparing the simulation data and historical data.After the credibility of the model is recognized,this paper puts forward the method of transforming the actual policy effect into the corresponding parameters in the integrated model,and takes limiting the proportion of private car travel,limiting urban land supply and development,and improving the level of urban road supply as examples to show the way of policy analysis and relevant analysis results.Finally,the main work,conclusions,achievements and innovations of this study are summarized,and the limitations of this study are put forward,and the future research is prospected.