Sponge City Green Construction Research Of Xiaan Urban Road

With the rapid development of urbanization in China,the lagging urban rainwater management system has brought many problems,which directly restrict the normal operation of cities and affect the urban ecological security system.To this end,China proposes the "sponge city" construction concept,whose idea is using low-impact development(LID)technology to control rainwater runoff.At present,the natural collection area for urban rainwater in Xi’an is less and less.Besides natural landscape and artificial water system,there is only urban green space.Since road greenbelt is a significant part of urban green space system,the application of low-impact development(LID)technology is imperative.This paper studies the application of sponge urban technology and facilities in the road greenbelt of Xi’an: under the condition of ensuring the urban road greenbelt’ functions,low-impact development(LID)technology should be scientifically and rationally used to guide the future construction of road greenbelts in Xi’an,thereby alleviating the pressure of rainwater discharge and balancing the urban road ecological environment.Firstly,this paper analyzes the background of the sponge city construction in China,explains the relevant theoretical concepts,introduces the application status of related research in China and abroad,and clarifies purpose and significance of the study as well as the methods and contents.After that,the relationship and differences between the sponge city construction concept and several major concepts of rainwater and flood management in foreign countries are deeply analyzed.Through analyzing the natural conditions of the sponge city construction in Xi’an a combined system of urban road green space and sponge city measures is constructed This combined system of measures involves: The general idea of sponge city construction of urban road greenbelt in Xi’an;the goals of sponge city construction of urban road greenbelt in Xi’an;the principles in applications of technologies and facilities of urban sponge city construction in Xi’an;proposing the combined system of low-impact development(LID)technology and facilities technology and facilities by analyzing characteristics of urban road greenbelt in Xi’an.Finally,taking the sponge city construction’s technology and facilities of Xi’an Jian Cai North Road as an example,this work designs a complete system of technical facilities by countering the characteristics of road greenbelt in Xi’an,and this system achieves ecological effects of the combination of road landscape effect and rainwater treatments.