Study On Landscape Renovation Of Rainwater System In Old Residential Area Based On Sponge City Theory

Influenced by extreme climate and unreasonable construction mode in the process of rapid urbanization,the urban water environment in China is becoming increasingly severe.Problems such as waterlogging and water pollution have adversely affected the daily life of cities and residents.Due to the long-term construction and the lag of infrastructure construction,the rainwater problems faced by the old district are more prominent.While,the construction of the sponge city can effectively alleviate the urban water environment crisis to a certain extent,and has great potential in dealing with urban water environment problems.How to effectively alleviate the water environment crisis in old district through the landscape approach of the rainwater system is the starting point of this paper.Around this theme,this paper firstly abstracts and generalizes the sponge city and its related concepts,and then analyzes the problem of rain-flood in the old residential area from the technical level and the management level,respectively.At the same time,it analyzes and generalizes the difficult problems in the revamping of rainwater system in the old residential area.Furthermore,combining with the cases,the paper summarizes the related design methods.Secondly,under the design guide of landscape approach,it puts forward the design goal of alleviating water crisis and improving landscape environment quality,and then proposes five principles of sponge reconstruction from concept and approach aspects.Thirdly,the specific design methods and technical facilities are analyzed and studied from the following six aspects:overall planning layout,collection and utilization of roof rain water,roads and squares,green spaces,parking spaces and water bodies.Finally,it takes the landscape renovation of rainwater system in Shuixiang Garden District of Suzhou as an example.