Research On The Planning And Design Of The "sponge City" Of Parks And Green Spaces Under The Concept Of Low-impact Development

In the 40-year high-speed urbanization process of reform and opening up,the continuous increase in the rate of surface hardening has led to the destruction of natural rainwater infiltration processes,affecting the city's natural ecological processes and hydrological cycle processes.Causing flooding and internal degradation on the road and a series of urban environmental problems,such as aquatic ecological crisis.In this case,the proposed sponge city concept gradually reduced the impact of hydrology on the building area,replacing the reduction of urban internal space and the pollution of rainwater runoff.Ecology,improving urban environmental quality and greening as natural carriers of the city can fully play the role of leakage,ecological functions of water conservation,energy storage,net,utilization and drainage,reducing the ultimate pressure of runoff.It is an important carrier for building sponge cities and can effectively alleviate many other problems in the development of urbanization belts.First of all,the paper systematically combs the background of the concept of sponge city and determines the research content.This paper analyzes the purpose and significance of the research,analyzes the concepts of low impact development,sponge city and park green space,combs the correlation between low impact development and sponge City,and summarizes the research and development of foreign low impact development concept and domestic sponge city concept.Secondly,the typical cases of foreign low impact development and domestic sponge city concept applied to park green space construction are studied and analyzed.Under the guidance of low impact development theory,the classic cases of rain flood management and sponge city construction at home and abroad are analyzed,and the low impact development design ideas and specific measures of rain flood management in the cases are drawn.Through on-the-spot investigation,this paper makes an in-depth analysis of the park green space under the guidance of the concept of sponge City,studies the characteristics of the relevant cases of the park green space design under the concept of sponge City,and summarizes the experience and enlightenment that can be used for reference.Thirdly,on the basis of theoretical research,case analysis and field research,this paper analyzes the rainwater management objectives and design principles of low impact development concept applied to park green space,and puts forward the design strategy of the combination of low impact development concept with green space system,urban water system and urban green space ecology.Combined with the goal and demand of rainwater management of each underlying surface in the park green space,this paper analyzes the concept of lid measures applicable to the components of pavement,green space,building and water body in the "sponge city" system of urban park green space and the technical points applied to the lid facility system of park green space.Finally,Taking Jinan City as the research object,the paper analyzes the natural conditions of Jinan City,the current situation of spring water cut-off and road flood discharge,and determines the construction goal of urban sponge system in park green space.According to topography,hydrogeology,distribution of green space andrunoff characteristics,Jinan urban park green space is divided into three types:Mountain Park,general park and ribbon riverside park.According to their characteristics,this paper expounds the construction of sponge system of urban park green space under the concept of low impact development.