1·The pollution of runoff more serious waterlogging disasters will be formed when the load exceeds the maximum runoff drainage time.
径流的污染情况比较严重，当径流量超过排水管网的最大负荷时就会形成内涝灾害。
2·Urban waterlogging is relatively common in China.
城市内涝在中国较为普遍。
3·Because human activities and hydroenergy development along the Hongshui River, the karst immersion waterlogging hazards have become increasingly critical, which we should pay serious attention to.
红水河流域由于多年人类活动和水能资源开发所产生的岩溶浸没—内涝灾害，在局部范围内比较严重，必须引起高度重视！
4·Waterlogging disasters seriously affect people's lives and health, and have caused huge economic losses to society.
内涝灾害的发生严重影响了人们的生活和健康，为社会造成巨大经济损失。
5·Urbanization aggravates the damage degree of waterlogging. All these are the main reasons that cause the waterlogging disasters of Nanjing City.
城市规划上的不足降低了城市对内涝灾害的承灾能力，城市化加重了城市涝灾的危害程度。