基于一维、二维耦合水动力模型的水库溃坝洪水演进分析  

Analysis of dam-break flood propagation based on 1D and 2D coupled hydraulic model

作　　者：邵广哲 李云瑶 宋利祥 张雪 SHAO Guangzhe;LI Yunyao;SONG Lixiang;ZHANG Xue(Guangdong Yuedian Nanshui Power Gen-eration Co.,Ltd.)

机构地区：[1]广东粤电南水发电有限责任公司,广东韶关512000 [2]河海大学港口海岸与近海工程学院,江苏南京210098 [3]珠江水利委员会珠江水利科学研究院,广东广州510000

出　　处：《大坝与安全》2024年第6期61-67,共7页Dam & Safety

摘　　要：溃坝是一种低概率、高致灾风险的突发性事件,溃坝洪水风险图是减轻下游洪水淹没损失的重要非工程措施。以广东省南水水库为例,利用HydroMPM软件建立一维、二维耦合洪水演进模型,并结合BREACH模型计算土石坝溃口流量过程,模拟非汛期管涌溃决、汛期管涌溃决和漫坝溃决三种工况下溃坝洪水的传播过程。结果表明,水库一旦失事,溃坝洪水急剧下泄、峰高量大、冲击力强,将使下游承受严重的洪水淹没损失。溃坝洪水淹没范围等成果可为下游群众转移、洪水预警提供技术依据。Dam-break is a sudden event with low probability and high risk.Dam-break flood risk map is an important non-engineering measure to reduce the inundation loss caused by downstream flood.Taking Nanshui reservoir in Guangdong province as an example,a 1D and 2D coupled flood propagation model is established by using HydroMPM software,and the flow process at earth-rock dam breach is cal-culated by using BREACH model.The propagation processes of dam-break flood under three condi-tions—piping break in non-flood season,piping break in flood season and overtopping break—are simu-lated.The results show that once the reservoir fails,the dam-break flood would discharge sharply with high peak and strong impact force,which would cause serious flood inundation loss to the downstream ar-ea.The results such as dam-break flood inundation range can provide technical basis for evacuation of downstream people and flood warning.

关 键 词：溃坝洪水 HydroMPM软件 BREACH模型 洪水演进模拟 淹没范围 

分 类 号：TV697[水利工程—水利水电工程]