Research on the Design of Guangzhou Tianhe Wetland Park Based on the Reflection of Sponge City Construction

Research on the design of Guangzhou Tianhe WetlSince the reform and opening up, China's cities have experienced a rough development stage of unilaterally pursuing economic growth, which has produced many ecological problems, among which water safety and water quality have become one of the prominent problems plaguing urban development. In order to cope with water problems, many developed countries have put forward different solution strategies based on their own characteristics and needs. In 2014, the Ministry of Construction announced the Guidelines for Sponge City Construction, marking the comprehensive start of sponge city planning and construction. As the lungs of the city, urban wetland parks have large water bodies and green spaces, which become the best practice sites for the concept of sponge city; at the same time, as a park, it is also one of the important components of the urban public space system, which is closely related to people's daily life, and the organic combination of wetland parks, wetland ecological protection, and public space design will bring greater social and economic benefits. Due to its topography, climate and urbanization, Guangzhou is also facing serious water problems and has relevant practices in this regard. In 2013, the Guangzhou Municipal Government commissioned the Beijing Turenscape to design the Guangzhou Tianhe Wetland Park with the guiding principle of sponge city. The wetland park has been in operation for 8 years since its completion, and has become an important place for public recreation, but its effectiveness in water treatment and ecology has been questioned by the public. In this paper, we hope to understand its operation situation through various data collection and detailed on-site research, and based on the reflection and evaluation of the real situation, we propose a strategic guideline based on urban design on how to achieve the effect of "1+1 is greater than 2" for the future urban wetland parks in terms of both ecology and publicity. This paper researches the theory and practice of sponge city, synthesizes various water management strategies and methods, combines the ecological design method of wetland parks and the design method of urban public space to meet the needs of citizens for leisure and recreation, and proposes a toolbox of design methods for urban wetland parks in Guangzhou, which will be used in the optimized design scheme of Tianhe Wetland Park in Guangzhou. Firstly, the development history of water management related concepts at home and abroad and their exploration process in urban wetland park design are sorted out. Secondly, we analyze the specific design cases of urban wetland parks in Singapore, the United States, Australia, China and other countries, and summarize the design methods in terms of water treatment, wetland ecological protection and public space optimization. Once again, based on the geographic and climatic characteristics of Guangzhou and the existing sponge city construction status, the design method of sponge urban wetland park suitable for Guangzhou is proposed from the above three aspects. In addition, the current situation of Tianhe Wetland Park is investigated and analyzed to summarize the problems that exist in the process of its operation. Finally, based on the results of the analysis, from the perspective of problem solving, we extract the applicable parts of the above design methods, and propose the optimized design scheme of Tianhe and Park based on reflection on sponge city construction