Abstract
Urban water system ecology has been severely damaged, urban waterlogging, water pollution, water resources shortage and other problems have become more serious, and it is urgent to repair and harness them. The concept of sponge city can effectively improve the state of urban water system. Therefore, this article aims to provide theoretical support for China's sponge city pollution water purification technology by analyzing the characteristics, hazards, and different sewage purification technologies of urban sewage.
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