Parameterized Design Method Of Residential Green Space System Based On Sponge City Technology

Since the modern times,urban construction has changed the material of the surface of the earth's surface,and a large amount of hardened materials such as cement have significantly improved the imperviousness of the urban surface.At the same time,the increase in the density of urban rainwater pipe networks has greatly shortened the convergence time of rainwater,and the period of internal flooding in cities has been reduced.Shortening the flood peak time has caused serious damage to the city's security.At the same time,most of the large urban residential areas under planning did not consider the regulation and management functions of green land in the residential areas into consideration.The concept of drainage in urban settlements still maintains the traditional form of pipe network and lacks integration with green space.The regulation of rainwater cannot be effectively carried out,and the green areas in the settlements are fragmented.There is a lack of complete ecological network structure combined with the rainwater flooding process,and the toughness in rain and flood is poor.Since 2012,with the country's attention to the problem of urban floods,the construction of sponge cities in China has developed rapidly.As the main carrier of the sponge city,the urban green space system has achieved universal understanding of the role of runoff regulation in the management of stormwater.As the main component of the urban construction project,the rainwater and drainage in the residential areas are also the starting point of the water pressure of the urban municipal pipe network.Therefore,the sponge construction in the residential area has also been greatly promoted in the construction of the overall sponge in the city.However,the research on the mechanism of the spatial structure of residential green space for the control of rainwater is still relatively lacking.The relationship between residential green space parameters and residential construction indicators for rainwater management is not clear.This paper starts with urban residential unit runoff control,analyzes the whole process of water cycle,and analyzes the runoff simulation software to discuss the influence of morphological parameters and functional parameters of residential land on runoff control,and proposes a parameterized design method for residential green space system.Take Chongqing Dazu Residential Area as an example for simulation verification.The text is mainly divided into the following six chapters:The first chapter: Introduction,to explain the changes in runoff caused by the transformation of land properties under the background of rapid urbanization in China,the unreasonable planning of green space in residential areas,the rapid development of sponge cities,and the popularization of parametric design methods;The purpose of the research on the runoff control of the green space system is to proceed;the objectives and contents of the morphological parameters,functional parameters,and parameterized design methods for the residential greenbelt are proposed;and the research methods for problem cognition,goal fusion,parameter determination,and method construction are defined.Establish research frameworks and technical routes.The second chapter: Comprehensive research on domestic and foreign related research progress,including three aspects: site-scale sponge city planning and construction technology methods,residential green space planning and management methods and residential green space technical parameters,summed up the domestic The current situation of runoff control on the external site scales and put forward the deficiencies in related research.The third chapter: Through the analysis of the settlement construction mode,the five types of green space morphological structure patterns are summarized: center type,marginal type,strip type,island type,balanced type,three types of runoff characteristics are defined,and the related green space is determined.The morphological indicators and significance are simulated from the morphological indicators of the residential greenbelt and the residential construction model,and the relationships between the single morphological indicators of the residential greenbelt and the runoff control intensity under the different residential construction models are determined and given in different runoffs.The choice of morphological parameters and settlement construction modes under the control objectives and the suggestions for value selection were proposed;various implementation approaches for morphological parameters of residential green space were proposed.The forth chapter: Analyzes and summarizes the compound paths and methods of the traditional functions and runoff management functions of residential greenbelts;determines the residential watershed water retention model based on rainwater management objectives and the relationship between residential rainwater infiltration and storage;The relevant parameters of the zone illustrate the key design parameters for the model of water retention;a variety of implementation approaches for functional parameters of residential green space are proposed.The fifth chapter: Based on the residential area's runoff control objectives,taking the residential area of Dazu in Chongqing as a case,this paper proposes a key parameter design method system for runoff control in the planning of the residential area.The sixth chapter: Summarizes the research conclusions of the parameterized design of residential green space systems and looks forward to the planning and construction of green space in urban settlements in the future.At the same time,the limitations and deficiencies in the research of this paper are analyzed.