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大中城市中心城区要能有效应对不低于50年一遇的暴雨,地级城市中心城区要能有效应对不低于30年一遇的暴雨,其他城市中心城区要能有效应对不低于20年一遇的暴雨发生城市雨水管网设计标准以内的降雨时,地面不应有明显积水;发生城市内涝防治标准以内的降雨时,城市不能出现内涝灾害;发生超过城市内涝防治标准的降雨时,城市运转基本正常
Large and medium-sized cities downtown area can effectively deal with no less than 50 years once the torrential rain, prefecture-level city center to be able to effectively deal with no less than 30 years once the torrential rain, other urban centers to be able to effectively deal with not less than 20 In case of heavy rainfall in one year, rainfall should not cause obvious groundwater in the urban rainwater pipe network; when there is rainfall within the urban waterlogging prevention standard, no waterlogging disaster will occur in the city; when precipitation exceeds the standard of urban waterlogging prevention and control, The city is running normally