Plan And Design Of Park Green Space Based On Sustainable Stormwater Management Optimization

Under the general trend of climate warming,excessive urbanization and unreasonable urban development have brought about a series of complex urban hydrological problems,including frequent floods,severe pollution of stormwater runoff and depletion of water resources,which have seriously affected all aspects of city operation.As a less developed area in the city,park green space has the functions of stormwater infiltration,collection and storage,which is the key content of sponge city system.However,there are still some problems in the planning and design of the park.This paper proposes a planning and design method for park green space based on sustainable stormwater management optimization,aiming to promote the integration of green space system and stormwater management system,improve the ability to regulate and control stormwater in park green spaces,establish a good relationship with the city for human-water regulation,and ultimately achieve the overall goal of protecting and restoring regional hydrological conditions.First of all,the water management activities of the garden were studied systematically.This paper analyzes the development of traditional water management activities in China and the west,summarizes the changes in the characteristics,methods and ideas of water management in different periods,and puts forward the positive ancient experience on the basis of this.Then,based on the construction experience of the first batch of national sponge cities,the paper summarizes the characteristics of park green space and the effect of flood control,and analyzes the development trend of park green space in the future.This paper puts forward some reflections based of the problems in the planning and design of the current green space construction of parks in China,.Next,the paper probes into the ideas and methods of the park green space planning and design based on sustainable stormwater management optimization.First,from the total amount of runoff control,pollution control,stormwater resources utilization three aspects of planning objectives,guide the park green space construction.Secondly,based on the natural hydrological process and the mechanism of stormwater runoff,the optimization method of park green space layout and site selection is proposed.Identify the types and functions of the green space in the park according to the urban stormwater special planning.At the same time,the stormwater regulation factor is put into the scale calculation of the park to improve its capacity of receiving guest water.Thirdly,according to the different functions of stormwater regulation,the park green space is divided into three types: source control type,runoff transfer type,terminal storage type.According to the type of storage land,the park green area is divided into dry park and wet park.According to the different terrain conditions,the park green space is divided into three types: mountain type,low-lying type and flat type,and the design points and design methods are proposed for each type of park.Once more,the design method of green stormwater infrastructure(GSI)in park green space is studied.First,the paper puts forward the layout method and characteristics of GSI in the green space of the park,and discusses the combination mode of stormwater infrastructure and landscape elements.Second,the facility function of different types of GSI and the refinement requirements of facility microenvironment on plants were analyzed.Thirdly,based on the requirements of GSI on plant performance,a plant evaluation index system based on AHP method was proposed to scientifically guide plant selection.Fourthly,plant landscape design method is proposed for different scales of GSI.Finally,taking an ecological park in the north of China as an example,based on the local rainfall conditions,terrain conditions,land use conditions,current facilities and other conditions,the planning and design of park green space as an important storage space in the ecological storage system is described in detail,so as to provide reference for the construction of park green space in the future.