Evaluation And Spatial Optimization Of Green Space System In Pengzhou Urban Built-up Area

With the acceleration of global industrialization,informationization and urbanization,a series of ecological environment problems have increased dramatically,and ecological crisis has become a huge survival challenge that human beings have to face.How to restore the damaged ecological balance and further prevent the aggravation of its destruction,and build a livable and harmonious ecological environment has become an important issue of concern to all countries in the world.As an important indicator of urban ecological system,urban green space system plays an important role in beautifying the environment,satisfying residents' life and recreation,preventing disasters and avoiding disasters.However,in the process of early urbanization in China,green space system as urban infrastructure construction has not been paid enough attention.More urban green space systems lag behind in ecological development consciousness and fail to form reasonable green.The layout of land spatial structure does not meet the residents' living needs,and many ecological problems arise,such as poor quality of green space,lack of manual intervention,being replaced by urban construction land,etc.Some urban ecological environment is very fragile,and the quality of human settlements is low,which is not an ideal livable environment.Therefore,the scientific and systematic evaluation of the status quo of urban green space system is the premise of the study of urban ecosystem.On this basis,improving the quality of urban space,optimizing the urban spatial structure and providing decision-making strategies for the development of green cities are important aspects of the theoretical study of urban green space system planning,and have strong practical guiding significance.Taking the downtown area of Pengzhou as the main research area,the following five aspects are studied according to the current situation of the urban green space system.In this paper,Pengzhou downtown as the main research area,according to the status of its urban green space system to make the following five aspects of research,the conclusions are as follows:(1)Firstly,the development history of urban green space system and the theories and methods of green space system research at home and abroad are analyzed,and the relevant domestic laws and regulations,guiding policies and suggestions are further consulted.On this basis,the basic principles,content and direction of urban green space system evaluation and system construction methods are defined.(2)Secondly,taking Pengzhou as the specific research object,combining with the field survey,historical and cultural data and relevant departments' data,the paper analyses the development status of Pengzhou from the aspects of geographical location,nature,social economy and other aspects as a whole;furthermore,the process of green space construction in the central urban area of Pengzhou and the current situation of various types of green space construction are further analyzed,and the current situation of green space system in the central urban area of Pengzhou is analyzed.To dig out the problems of urban green space system construction.(3)Thirdly,the paper evaluates the current situation of the green space system in the central city of Pengzhou City by using the analytic hierarchy process(AHP)from four aspects of "green quantity index","green space layout index","ecological benefit index" and "landscape evaluation index",as well as 16 specific indicators such as "per capita park green space area","green coverage rate" and "historical landscape protection degree".The results show that the status quo of the green space system in the central urban area of Pengzhou City is in Grade II,and the construction status of the urban green space system is in the upper middle level,which needs further optimization.(4)Finally,based on the evaluation results of the current situation of urban green space system,the specific optimization strategies of urban green space system are put forward with the aim of highlighting the ancient charm of Shufeng and constructing Peony Flower City.Taking Pengzhou as an example,this paper studies the basis and system construction of urban green space system evaluation,reveals the general status of urban green space system construction in Pengzhou and even in the west of the same level from a certain level,which is of great significance to urban green space system research,and can provide some reference for urban green space system construction in other similar areas.