深圳市2023年“9·7”极端特大暴雨洪涝复盘模拟分析——以深圳龙华区观澜河流域为例

Retrospective simulation and analysis on"9·7"extraordinary rainstorm and flood in the Shenzhen City—Taking the Guanlan Watershed of the Longhua District as an example

2023年9月7—8日,深圳市出现超历史纪录的特大暴雨,龙岗河、深圳河、观澜河等流域遭受严重洪涝灾害。以龙华区观澜河流域为例,采用洪水分析软件HydroMPM构建城市暴雨洪涝模型,对龙华区观澜河流域2023年“9·7”极端特大暴雨洪涝情况进行了模拟,分析了河道漫溢水淹及城区积水情况,为揭示洪涝灾害成因和提出防治对策提供依据。

Record-breaking rainstorm occurred in Shenzhen during the Sep 7th and 8th,2023,which caused severe pluvial flooding,resulting in enormous damage in the watersheds including Longgang,Shenzhen and Guanlan watersheds.This research simulated the flooding of the Guanlan watershed in the Longhua District during the rainstorm,with the flooding analysis software,HydroMPM.Then,the situations of river channel overflow and the waterlogging in the urban areas were analyzed.The research results help revealing the causes of flooding disaster formation and thus providing reference to the decision-making on countermeasures.