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从住房城乡建设部获悉,新修订的国家标准《室外排水设计规范》日前已经开始施行,首次明确城镇内涝防治设计标准。据了解,城镇内涝防治的主要目的是将降雨期间的地面积水控制在可接受的范围。此前我国没有专门针对内涝防治的设计标准,修订后的国家标准《室外排水设计规范》增加了内涝防治设计重现期和积水深度标准。根据新标准,关于内涝防治设计重现期,特大城市为50年到100年,大城市为30年到50年,中等城市和中小城市为20年到30年。这就意味着,
From the Ministry of Housing and Urban-Rural Development was informed that the newly revised “National Code for Design of Outdoor Drainage” has come into operation a few days ago, marking the first time that urban waterlogging prevention and control standards have been set. It is understood that the main purpose of urban waterlogging control is to control the surface water during the rainfall within an acceptable range. Prior to our country there is no specific design standards for prevention and control of waterlogging, the revised national standard “outdoor drainage design specifications” increase the design of waterlogging prevention and control of the reproductive period and depth of water standards. According to the new standards, the design reclamation period for flood control should be 50 to 100 years for mega-cities, 30 to 50 years for mega-cities, 20 to 30 years for medium- and small-sized cities. This means that,