Inverse analysis of flood caused by 2023"9·7"extreme rainstorm in Longgang River Basin
The"9·7"extreme rainstorm in Shenzhen caused serious floods in Longgang basin.The lack of hydrological monitoring stations in the basin has brought challenges to flood analysis and disaster recovery.In order to clarify the charac-teristics of flood disasters in small scale urban basins,this study combines the field survey and measured water level,uses the measured rainfall data,modifies the parameters of the rainstorm isoline map,calculates the design flood of each typical section of the basin,analyzes the calculation results of rainstorm flood through the simulation routing of the flood mathemati-cal model,and compares them with the design flood of the basin,and gives the flood level caused by 2023"9·7"extreme rainstorm in Longgang River.The study further analyzes the characteristics and causes of rainstorm and flood,and puts for-ward measures and suggestions to improve the flood control system from both engineering measures and non-engineering measures around the problems in flood disaster prevention,in order to provide reference for flood disaster prevention and control in small basins of high-density cities.
Shenzhen"9·7"extreme rainstormflood analysisflood simulationLonggang River Basin
NETL
NSTL
万方数据
