Analysis of flood situation in Futuan River Basin based on the transplantation of the “7·20” extreme rainstorm in Zhengzhou City
WANG Fan1,2, WANG Xiaotong3, ZHUANG Ling3, WANG Weiqi1,2, FENG Xinzheng1,2, ZHANG Dawei1,2
1. China Institute of Water Resources and Hydropower Research, Beijing 100038;
2. Research Center on Flood & Drought Disaster Reduction of the Ministry of Water Resources, Beijing 100038;
3. Shuifa Planning and Design Co., Ltd, Jinan 250000
Abstract：Given the context of climate change and rapid urbanization expansion, China is facing an increasing risk of extreme rainstorm and flood disasters. The "7·20" extreme rainstorm disaster in Zhengzhou City of Henan Province, resulted in significant loss of life and property, revealing many problems such as inadequate awareness and preparation for major disasters, weak prevention organizations, and improper emergency response measures. In this paper, the techniques of rainstorm transplantation and flood simulation are employed, and the distributed hydrological model and 2-D hydrodynamic model are utilized to analyze the flood situation in the Futuan River Basin of Rizhao City under the "7·20" extreme rainstorm scenario. The two schemes that the rainstorm center is located in Sanzhuang Town in the upper reaches of the Futuan River and Rizhao street of the downtown area in the lower reaches are proposed. A comparison and analysis of the flood impact of two schemes is provided. According to the findings of this study, both Rizhao Reservoir and Maling Reservoir in the watershed experienced inflow flood peaks that exceeded their historical maximums under the two schemes. The overall disaster area of downstream social-economic zone was 151.96 km2 and 166.02 km2 respectively. When the center of the rainstorm was situated in the urban area, there was an increase in average submerged depth of the downstream area from 0.46 m to 0.73 m, resulting in a rise of 9.3percent in damage area within the social-economic zone. Under the current engineering conditions, in the event of an extreme rainstorm in the Futuan River of Rizhao City, floods will pose a significant threat to numerous residential areas, critical institutions and infrastructure. Therefore, it is imperative to develop emergency plans and conduct pre-flood drills based on scenario analysis for such extreme rainstorm events.
王帆, 王晓童, 庄玲, 王玮琦, 冯新政, 张大伟. 基于郑州“7·20”特大暴雨移置的山东省傅疃河流域洪水形势分析[J]. 中国防汛抗旱, 2023, 33(9): 19-24,55.
WANG Fan, WANG Xiaotong, ZHUANG Ling, WANG Weiqi, FENG Xinzheng, ZHANG Dawei. Analysis of flood situation in Futuan River Basin based on the transplantation of the “7·20” extreme rainstorm in Zhengzhou City. journal1, 2023, 33(9): 19-24,55.
2023, Vol. 33 
