Sponge city

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Sponge city (Chinese: 海绵城市) is a nature-based urban planning model originated in China that emphasizes the implementation of ecological infrastructures in urban hydrological management. Sponge cities focus on flood prevention and stormwater management via utilization of green infrastructure instead of purely relying on drainage systems. Urban flooding, water shortages and the heat island effect can be alleviated by having more urban parks, gardens, green spaces, wetlands, nature strips, and permeable paving, which will both improve ecological biodiversity for urban wildlife and reduce floods by serving as reservoirs for capturing, retaining and absorbing excess stormwater. The name comes from the analogy that greened landscapes can store, slow down and "soak up" surface water like sponges, thus helping other developed/settled areas stay dry. The concept has been inspired by ancient wisdom of adaptation to climate challenges, particularly in the monsoon regions in southeastern China that...

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