Warning and thoughts of extreme rainstorm on urban flood prevention
LIU Yuanyuan1,2, ZHENG Jingwei1,2, LIU Hongwei3, LIU Yunhua4, LIU Yesen1,2, LIU Xunping5, FENG Mengmeng5, LIU Shu1,2
1. China Institute of Water Resources and Hydropower Research, Beijing 100038; 2. Research Center on Flood and Drought Disaster Reduction of the Ministry of Water Resources, Beijing 100038; 3. Beijing Water Authority, Beijing 100038; 4. Water Resources Bureau of Shenzhen, Shenzhen 518036; 5. Shenzhen Guanghuiyuan Environment Water Co., Ltd., Shenzhen 518038
Abstract:On July 20,2021,extreme rainstorm occurred in Zhengzhou,resulting in serious flood disaster. In this paper, the rainstorm conditions in Zhengzhou are transplanted to Shenzhen and Beijing respectively, and the urban flood simulation model is used to simulate in order to sum up the experiences and lessons and analyze the causes of this disaster.The simulation analysis results show that had the extreme rainstorm occurred in Shenzhen or Beijing, it would have produced serious flood disasters, river overflow and serious ponding.The single practice of improving the urban flood control and drainage standard through engineering measures can deal with the rainfall within the design standard, but cannot deal with the extreme rainstorm events exceeding the design standard. Therefore,it is suggested to carry out joint drainage,joint commissioning and overall management of urban flood and waterlogging at the river basin, regional and urban levels; Simulate the urban waterlogging and ponding risk under different rainfall conditions, especially the exceeding standard rainstorm,predict and evaluate the urban disaster bearing capacity,formulate and improve early warning indicators and flood control management emergency response plan, improve the government's comprehensive coordination ability,timely issue early warning and prompt information before the rainstorm, and quickly guide relevant departments and citizens to take necessary preventive measures, protect the life safety of citizens and reduce property losses.
刘媛媛, 郑敬伟, 刘洪伟, 刘云华, 刘业森, 刘训平, 冯蒙蒙, 刘舒. 极端大暴雨对城市防洪的警示和思考[J]. 中国防汛抗旱, 2021, 31(9): 21-24.
LIU Yuanyuan, ZHENG Jingwei, LIU Hongwei, LIU Yunhua, LIU Yesen, LIU Xunping, FENG Mengmeng, LIU Shu. Warning and thoughts of extreme rainstorm on urban flood prevention. journal1, 2021, 31(9): 21-24.