What does Sponge City mean?

Sponge city is a new generation of urban rainwater management concept, which means that a city can be as flexible as a sponge when it adapts to environmental changes and responds to natural disasters caused by rain, and it can also be called a "water-elastic city".

The international name is "low-impact rainwater system construction", which absorbs water, stores water, seeps water and purifies water when it rains, and releases the stored water when necessary to realize the free migration of urban rainwater. Starting from ecosystem services, it is the core of sponge city to build water ecological infrastructure through cross-scale construction and combining with various specific technologies. ?

Principles of sponge city.

As an important symbol of the transformation of urban development concept and construction mode, the "timetable" of sponge city construction in China has been made clear, "only forward, not backward". More than 130 cities across the country have formulated sponge city construction plans. The core of the goal is to make 70% of the rainfall absorbed and utilized locally through the construction of sponge city.

The timetable for this goal is that by 2020, 20% of urban built-up areas will meet this requirement. If the built-up area of a city is 100 square kilometers, at least 20 square kilometers will meet this requirement in 2020. By 2030, 80% of urban built-up areas will meet this requirement.

Refer to the above? Baidu encyclopedia-sponge city