郑州“7·20”暴雨洪涝几个水文问题的讨论

A discussion on several hydrological issues of "7·20" rainstorm and flood in Zhengzhou

全球变暖和城市化发展加剧了暴雨洪涝灾害风险,严重威胁区域经济社会的安全与发展。郑州“7·20”特大暴雨洪涝是近10年中国单个市域范围内因灾伤亡最多、经济损失最重、灾害影响极大的城市内涝灾害。本文系统剖析了郑州“7·20”特大暴雨洪涝灾害的特征和成因,围绕暴雨洪涝灾害防御中存在的主要问题,阐明了气象水文监测预警工作的短板,并指明了天气预报预警、水文监测预报预警及新技术应用等在应对城市暴雨洪涝问题上需重点加强的方向,以期为城市洪涝灾害防御和智慧管理工作提供支撑。

Global warming and urbanization aggravates the disaster risk of regional rainstorm and flood,and seriously threatens the security and development of regional economy and society.The"7·20"rainstorm and flood in Zhengzhou is the urban waterlogging disaster with the most casualties,the heaviest economic losses and the greatest disaster impact in a single city in China in the past 10 years.In this paper,we systematically analyzes the characteristics and causes of the"7·20"rainstorm and flood disaster.Focusing on the main problems of rainstorm and flood disaster prevention,the shortcomings of meteorological and hydrological monitoring and early warning are clarified.Finally,the key strengthening directions of weather forecast and early warning,hydrological monitoring and early warning,and new technology application in the prevention of urban rainstorm and flood are pointed out,in order to provide support for urban flood disaster prevention and intelligent management.