What is Sponge City? Sponge city refers to the fact that our cities can be like sponges. They have outstanding "elasticity" in the face of environmental changes and natural disasters. They absorb water, store water, infiltrate, and clear water in the rain, and release the stored water when needed "And use it. The construction of sponge cities should follow the principles of ecological priority, and combine natural approaches with artificial measures to ensure the drainage and waterlogging safety of the city to maximize the accumulation, infiltration and purification of rainwater in urban areas, and to promote rainwater resources. Outstanding use and maintenance of the ecological environment. The construction of a "sponge city" is not to overthrow and completely replace the traditional drainage system, but to "relieve" and compensate for the traditional drainage system, to maximize the role of the city itself. During the construction of the sponge city, the systemicity of natural precipitation, surface water and groundwater should be coordinated, and all aspects of water cycle such as harmonious water supply and drainage should be considered, and their complexity and long-term nature should be considered.
According to the news of the Ministry of Finance website, the list of pilot cities for sponge city construction was officially announced. Based on regional scores, the top 16 cities are (placed in the order of administrative divisions): Qian'an, Baicheng, Zhenjiang, Jiaxing, Chizhou, Xiamen, Pingxiang, Jinan, Hebi, Wuhan, Changde, Nanning, Chongqing, Suining , Gui'an New District and Xixian New District. The Ministry of Housing and Urban-Rural Development issued a document on June 10 to include Sanya as a pilot city in the city's "double repair", underground induction corridor and sponge city.