Evolvement And Mechanism Of Urban Green Space In Beijing Since The 1980s

This paper takes the urban green space of Beijing central City and its urban-rural junction as the research object,and studies its evolvement characteristics and evolution mechanism since the 1980s.The whole study is divided into four stages,the first stage is basic theory research,the concept of urban green space,domestic and foreign related theoretical research to comb;the second stage is the study of the background information of the region,including the study of the regional natural geography,the social economy and the urban planning and construction;The third stage is the study of the urban green space evolvement,and the remote sensing data of the American Landsat(Land satellite)series satellite as the data source,To obtain the evolution of the green space in Beijing 1980-2016 by means of remote sensing technology,on this basis,the quantitative change characteristics of urban green space are studied by further quantification,and the reason analysis is earried out.The last stage is to analyze the evolvement mechanism of urban green space based on the results of prophase study.It is found that the process of urban development in Beijing is the process of reducing the interaction and mutual cancellation between the green space growth and the exterior green space.The research data show that the total amount of urban green space in Beijing central City and its urban-rural junction area has increased in the 80 's.In the past 1984-2000 years,the amount of green space in the study area remained relatively stable,and in the 2000-2008 years,the green space of the city entered a rapid growth stage,and in 2008-2016 years,there was a certain decrease in the green space of the city.By analyzing the main factors that influence the evolution of urban green space,this paper summarizes three aspects of urbanization,greening policy and urban major events,and discusses the general mechanism of green space evolution in Beijing.The paper holds that in the process of the evolution of Beijing's green space,the urbanization is the intrinsic power,the greening policy is the direction and the system guarantee,the city major event is the important pushing force,the three interactions,formed the urban green space characteristic of today.