The region of Xiangdong district of the Pingshui river has been affected by flood disasters,suffering serious losses in previous years.This paper uses MIKE FLOOD to construct a 1D-2D coupled model of the regional flood evolution of the Xiangdong district of the Pingshui river,whose rationality is proved by analyzing the information on the measured water level process and survey flood marks in 2019.According to the study area fortification,this paper determines three calculation options of P=5%,P=2%and P=1%for design flood.The study on the regional flood risk zoning of the Xiangdong district of the Pingshui river is made by using the comprehensive risk method,taking into account the factors of flood risk characteristics such as maximum inundation depth,maximum travel velocity and maximum inundation duration.The results show that the regional flood risk in the Xiangdong district of the Pingshui river is classified into four levels:extremely high,high,medium and low risk.The middle and lower reaches of the river without dike protection have a high risk rating and are classified as the regions with extreme high or high flood risk.The flood risk in the Xiangdong urban regions is mainly in high or medium level,and the area of the county government is in the high flood risk level.The results can provide a scientific basis for flood control planning and construction of non-engineering measures in Xiangdong district.
Flood risk zoningMIKE FLOODComprehensive risk degreePingshui river
NETL
NSTL
万方数据
