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After failing to tame swollen rivers, China looks to build water-retaining cities

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After failing to tame swollen rivers, China looks to build water-retaining cities For centuries, China’s response to its unruly rivers has been to try to restrain them with levees, dams and canals. China’s National Climate Centre has records of natural disasters going back 500 years, and in almost every one of them there was a major flood. Yet the rivers continue to burst and China’s rapid urbanisation is making things worse. Former flood plains have become houses and factories, protected by ever-higher embankments. So the government is trying a new approach. On the northeastern fringe of Chongqing, around the giant new international exhibition centre, the rising district of Yuelai is designed as a “sponge city China’s cities flood partly because most of the water-retaining land that used to absorb rainfall – grassland, woods and lakes – has been paved over, forcing rain to flow directly into poorly built or outdated sewage and drainage systems that can no longer cope. The...