永康市杨溪水库下泄洪水影响分析

Impact Analysis on Flood Discharge of Yangxi Reservoir in Yongkang

为分析杨溪水库下泄洪水行洪影响,建立了河道陆地整体二维水动力模型,选取近年最大实际下泄洪水过程来率定模型参数,结果表明洪水过程计算与实测洪水基本吻合,然后针对20年一遇、50年一遇及100年一遇频率的下泄洪水进行演进模拟计算分析,模拟表明不同频率洪水漫堤溢流、淹没范围、淹没水深等特征与下泄洪水洪量过程相对应,洪水漫溢、洪水淹没空间分布合理。

In order to analyze the effect of flood discharge from Yangxi Reservoir,a two-dimensional hydrodynamic model of the riverway and land was established,and the parameters of the model are calibrated by selecting the maximum actual flood discharge process in recent years.The results show that the flood process calculation is basically consistent with the measured flood,and the flood evolution simulation analysis is carried out for 20-year,50-year and 100-year frequency of flood discharge.The simulation results show that the characteristics of flood overflow,submerged area and submerged depth are corresponding to the process of flood discharge,and the spatial distribution of flood overflow and flood inundation is reasonable.