Video: Urban flood protection solutions do not require sewers

In natural ecosystems, rainwater is absorbed by soil and plants. The majority then evaporates and the remainder penetrates deeper into the ground. Evaporation water cools the surrounding environment. Cities destroyed this system. Rain water cannot penetrate through concrete, flowed into the sewer.

Buildings are covered with greenery on the roof and outside.

The sponge city mimics the natural water cycle, keeping rainwater where it falls. Buildings are covered with greenery on the roof and outside.

Down to the street surface, urban wetlands and ditches on both sides of the road are called Swales , which function to absorb and retain water, keeping the city cool, being able to resist flooding and cool the surrounding environment itself. summer by imitating nature.