三江汇合口山区强弯河道洪水淹没研究  

Study of Flood Inundation of Strong Bend River Junction in Mountainous Area

作　　者：林斌[1] LIN Bin(Fujian Provincial Investigation,Design&Research Institute of Water Conservancy&Hydropower Co.,Ltd.,Fuzhou 350001,China)

机构地区：[1]福建省水利水电勘测设计研究院有限公司,福建福州350001

出　　处：《水电能源科学》2025年第2期15-17,136,共4页Water Resources and Power

摘　　要：基于福建省顺昌县城区河段整体二维数学模型,对不同洪水组合下山区强弯河道的洪水特征及其淹没情况开展研究。结果表明,受复杂洪源影响,汇合口至弯顶上游侧河段表现出不同的水面横比降沿程分布和流速重分布特征,在洪水组合1时具有更为显著的水面横比降,凹岸水位大幅高于组合2;水动力轴线偏向凸岸,而组合2时偏向凹岸;该类型河道的弯道水流特征导致两岸洪水淹没差异大,在洪水防控中应从水位、流速两方面考虑不利工况。研究成果可为当地防洪体系建设及防汛抢险提供科学依据,并为其他类似河段的洪水淹没分析提供技术参考。Based on the two-dimensional numerical model of the urban reach of Shunchang County,Fujian Province,this paper studied the flood characteristics and inundation of the strong bend river in the mountainous area under different flood combinations.The results show that the reach from the junction to the upstream of the bend apex has different characteristics of the water level transverse slope and velocity redistribution due to the influence of complex flood sources.Comparing with those results in Case 2,the water level on the concave bank is higher and the dynamic flow axis more close to the concave bank in Case 1.The adverse condition should be considered in flood prevention and control in terms of water level and velocity.The research of this paper can provide scientific basis for the construction of local flood control projects and flood control and emergency rescue,and provide reference for flood inundation analysis of other similar bend river.

关 键 词：不同洪水组合 强弯河道 汇合口 洪水淹没 二维数值模拟 

分 类 号：TV122[水利工程—水文学及水资源]