摘要
郑州“7.20”暴雨对南水北调中线工程郑州段防洪(护)堤造成了多处水毁,为了保障工程的安全运行,亟需对干渠水毁段开展防洪复核分析。基于MIKE21模型构建了二维降雨径流模型,模拟并分析了研究区段在200年一遇暴雨时,现状地形和工程后地形在干渠侧的积水分布。模拟结果表明:对于现状地形,紧邻干渠侧有多处积水,干渠侧沿线积水的峰值点与郑州“7.20”暴雨造成的水毁点相吻合;对于工程后地形,模拟结果显示紧邻干渠侧无明显积水,暴雨产生的洪水可沿截流沟得到及时排泄,较大程度上降低了暴雨对干渠的威胁。该结果可为下一步干渠防洪(护)堤的修复设计提供参考。
The“7.20”rainstorm in Zhengzhou caused many water damage to the flood control dike in the Zhengzhou section of the middle route of the South-to-North Water transfer Project.In order to ensure the safe operation of the project,it is urgent to carry out flood control review analysis on the flood damage section of the main canal.Based on the MIKE21 model,a two-dimensional rainfall-runoff model is constructed to simulate and analyze the current topography and the distribution of stagnant water on the side of the main canal in the case of rainstorm in the study area.The simulation results show that for the current topography,there are many stagnant water on the side of the main canal,and the peak point of the stagnant water along the side of the main canal coincides with the water damage point caused by the“7.20”rainstorm in Zhengzhou.The simulation results show that there is no obvious stagnant water on the side of the main canal,and the flood caused by rainstorm can be discharged in time along the closure ditch,which reduces the threat of rainstorm to the main canal to a great extent.The results can provide a reference for the next repair design of the flood control embankment of the main canal.
作者
焦军丽
Jiao Junli(yellow River Survey,Planning,Design and Research Institute Co.,Ltd.,Zhengzhou 450003,Henan)
出处
《吉林水利》
2022年第4期37-41,共5页
Jilin Water Resources
关键词
南水北调中线工程
MIKE21
防洪复核分析
middle route of South-to-North Water transfer Project
MIKE21
flood control review analysis
