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中文摘要：
针对水文资料缺乏的中小河流,以贵溪市罗塘河下游段为例,应用MIKE软件对河流溃堤洪水演进进行了研究。采用瞬时单位线法推求断面各频率的设计洪水,并将其作为洪水演进模型的输入;利用MIKE软件建立了贵溪市罗塘河下游段的一、二维耦合水动力模型,对该河下游段溃堤洪水演进过程进行了模拟;通过模拟分析,得到了溃口流量过程和堤防保护区洪水淹没过程。研究成果可为中小河流洪水风险分析和灾害损失评估提供技术支撑。
英文摘要：
In view of the medium and small rivers that are lack of observed hydrological data, taking the downstream of Luo- tang River in Guixi city as an example, we researched the dike - break flood inundation process of medium and small rivers by MIKE software. Instantaneous unit hydrograph method was applied to calculate designed floods at various frequencies that were used as flood routing model input. On this basis, the flood routing process of dike - break was simulated by applying the estab- lished one -dimensional and two- dimensional coupling hydrodynamic model by MIKE software. Through the simulation analy- sis, the processes of dike - break discharge and the flood inundation of dike protected area are obtained, the results can provide scientific technical support for the medium and small rivers flood risk analysis and disaster loss assessment.
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