Retrospective simulation and analysis of 2023 extreme flood in Derna,Libya
In the context of global climate change,the extreme values of hydrological events such as extreme heavy rainfall and floods have repeatedly broken historical records,which caused huge losses in the world.From Septem-ber 10 to 11,2023,under the influence of Mediterranean hurricane"Daniel",a rare extremely heavy rainstorm occurred in northeast Libya,causing two reservoirs in the upper reaches of Derna to burst one after another.The dam-break floods caused huge casualties in Derna.This article summarized the extreme flood events in Derna City,employing a two-dimensional hydrodynamic model to simulate the dam-break flood,based on which the dam break flood risks was mapped.The results were verified by the data obtained from the Copernicus Emergency Management Service(CEMS),which constantly monitors Europe and the globe for signals of impending disasters or evidence happening in real time.The simulation results showed that the dam-break flood lasted for about 2 hours,during which the damages and losses were concentrated in the first 30 minutes.The simulation results provide a distribu-tion map of dam-break flood hazard in Derna City,which could provide data support for local reconstruction and flood control management.It also could provide reference for dam-break prevention,early warning and emergency management in other regions of the world.
国家科技期刊平台
NSTL
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