分布式水文模型在“22.6”北江特大洪水中的应用研究

The Application of Distributed Hydrological Model in the“22.6”Beijiang Catastrophic Flood

为提升精细化洪水预报能力,强化数字孪生流域建设基础支撑,将基于物理机制的分布式水文模型应用于“22.6”北江特大洪水模拟和分析。结果表明,该模型对北江流域内29个水文站点的洪水过程和洪峰流量模拟效果良好,较好反演了“22.6”北江洪水过程,在北江流域具有较好的适用性;经飞来峡水库断面入库洪水还原分析,北江上游三大水库和飞来峡水库联合调度有效削减了下游洪峰流量。分布式水文模型的应用,有助于提升精细化洪水预报能力,强化数字孪生流域建设基础支撑。

A distributed hydrological model(HHMODEL)based on physical mechanisms was applied to the simulation and analysis of the“22.6”Beijiang catastrophic flood.The results indicate that the distributed hydrological model effectively simulates the flood process and peak flows at 29 hydrological stations within the Beijiang Basin,and it accurately reconstructs the progression of the“22.6”Beijiang flood,and the model demonstrates good applicability within the basin.According to the restoration analysis of the inflow flood at the Feilaixia Reservoir section,the joint operation of the three major reservoirs in the upper reaches of the Beijiang River and the Feilaixia Reservoir effectively reduced the downstream peak flow.The application of distributed hydrological models has enhanced the capability for refined flood forecasting and provided strong basic support for the construction of digital twin watersheds.