摘要
为复盘辽宁省绕阳河下游“2022.8”溃堤洪水发生、发展过程,分析洪水成因及溃堤原因,利用二维非恒定流水动力学模型模拟反演了绕阳河下游“2022.8”洪水,分析了绕阳河入辽河口的河势变化、绕阳河与辽河洪水关系及绕阳河左堤曙四联段溃堤原因等。结果表明,洪水模型模拟计算的淹没范围与遥感监测结果基本一致;2022年辽河洪水对绕阳河下游有壅阻作用,在绕阳河河口水位壅高,流速减少明显,从绕阳河河口沿绕阳河往上辽河洪水的壅阻影响逐步减小,到淤河盖站影响已很小;绕阳河河口的河势变化分析及近3年相关站点的洪水过程对比分析也佐证了这一结果;从溃堤原因分析可以看到,绕阳河左堤曙四联段的溃堤具有其必然性;针对模拟及分析结果,提出了相关措施建议。
In order to study the occurrence and development process of the"2022.8"levee-breach flood in the downstream of the Raoyang River,the causes of the flood and the levee-breach were analyzed.The"2022.8"flood process in the downstream of the Raoyang River was simulated by using a two-dimensional unsteady flow hydrodynamic model.The changes of river regime from the Raoyang River to the Liaohe River estuary,the flood relationship between the Raoyang River and the Liaohe River and the causes of the Shusi section levee-breach of the left embankment of the Raoyang River are analyzed.The results show that the inundation area calculated by the models is basically consistent with the results of remote sensing monitoring.The Liaohe River flood in 2022 has the blockage effect on the lower reaches of the Raoyang River.The blockage water level at the estuary of the Raoyang River increases and the flow velocity decreases obviously.The blocking effect of the Liaohe River flood from the estuary of the Raoyang River to the upstream decreases gradually,and the impact has become small at the Yuhegai Station.The analysis of river regime changes at the estuary of the Raoyang River and the comparative analysis of flood processes at relevant stations in recent three years also confirm this result.It can be seen from the cause analysis that it is inevitable to break the levee at the Shusi section of the left embankment of the Raoyang River.Suggestions on measures are put forward for the results of simulation and analysis.
作者
丁志雄
吕娟
李娜
王静
俞茜
DING Zhixiong;LYU Juan;LI Na;WANG Jing;YU Qian(China Institute of Water Resources and Hydropower Research,Beijing 100038;Research Center on Flood and Drought Disaster Reduction of the Ministry of Water Resources,Beijing 100038)
出处
《中国防汛抗旱》
2022年第11期64-69,共6页
China Flood & Drought Management
基金
国家重点研发计划项目(2022YFC3006400)
水利部水旱灾害防御战略研究人才创新团队项目(WH0145B0420211)。
关键词
水动力学模型
溃堤
洪水复盘
遥感监测
绕阳河
辽宁省
hydrodynamic model
levee-breach
flood inversion
remote sensing monitoring
Raoyang River
Liaoning Province
