Sponge city means that the city is like a sponge and has good "elasticity" in adapting to environmental changes and responding to natural disasters. It absorbs water, stores water, seeps water, and purifies water when it rains. use. Sponge city construction should follow the principles of ecological priority, combine natural approaches with artificial measures, and maximize the accumulation, penetration, and purification of rainwater in urban areas on the premise of ensuring the safety of urban drainage and waterlogging prevention, and promote the use of rainwater resources And ecological environment protection. In the process of building a sponge city, the systemic nature of natural precipitation, surface water and groundwater should be coordinated, and all links of water recycling such as water supply and drainage should be coordinated, and its complexity and long-term nature should be considered.
