The Study On Urban Green Infrastructure Planning And Design

The acceleration of Urbanization leads to the emergence of environmental pollution,city congestion,city waterlogging and other city issues.The worsening human settlement environment makes how to solve the urban problems an important research topic.Composed of natural areas and open space network of green infrastructure system is of great significance to alleviate the urban problems.This paper is based on the theory of green infrastructureis and written by using document analysis,field survey,case analysis,analysis and evaluation and other study methods.In order to explore the urban green infrastructure planning and design strategy.The main research results are as follows:First,Through the analysis of green infrastructure and urban infrastructure,gray infrastructure,urban ecological infrastructure,urban green space system,greenway and other related concepts,This paper summarizes the features,functions and measures of green infrastructure.The green infrastructure mentioned in this paper refers to the ecological infrastructure and the scale of planning and design of green infrastructure is within the scope of urban areas,which include the overall function of the region,structural planning and the application of specific green infrastructure measures at the site scale.Second,This paper combines cases at home and abroad in city green infrastructure planning and design and analyses planning concepts and techniques.The main contents that can be used for reference are as follows: In the present stage of analysis,the green infrastructure is classified and analyzed;In the overall planning stage,building a macro planning framework and network system with the scale of city;In the node design phase,appling specific stormwater management measures under site scale to design varied greenway.Third,this paper studies the planning and design strategy of green infrastructure by taking the green space around the marathon track of Beijing Olympic Games as an example.According to the different types and functions of the surrounding environment,the land can be divided into three categories: land for historical and cultural,for social services,and for ecological services.Beijing has obvious advantages,such as a long history,rich cultures,and various functions of the existing green space,but the green space is broken with not enough openness,unity or connectivity.Therefore,Four functional divisions which include the historical context,urban sponges,open green space and urban green roads are proposed in the master plan.And also strategies of green infrastructure planning and design cover history and culture,green transportation,ecological corridors,leisure experience.Using technical means of different scales,we can make the green infrastructure closely integrated,and connected with the external urban environment,which will function well and form an unified green space.Fourth,This paper puts forward a new idea of urban green infrastructure planning and design by combining theory and practice.On the premise of existing classification analysis of green infrastructure,the plan focus on building green infrastructure network system with connecting fragmented green space,protecting and enhancing the existing green space,setting up a new connection to connect the city green space at the same time.Using the multi-scaled green infrastructure with various functions,we will build the stable green infrastructure network with many layers and integrality.These ideas have important practical significance to explore the practical application of urban green infrastructure planning and design.And it provides reference for the planning and design of green infrastructure in other regions.