2017年黄河小北干流“揭河底”现象分析  

Analysis of “Bottom Tearing Scouring” Phenomenon of the Longmen-Tongguan Reach of Yellow River in 2017

作　　者：李军华[1] 张清[1] 江恩惠[1] 许琳娟[1] 

机构地区：[1]黄河水利科学研究院水利部黄河泥沙重点实验室,河南郑州450003

出　　处：《人民黄河》2017年第12期31-33,共3页Yellow River

基　　金：国家自然科学基金资助项目(51479080;51539004);水利部公益性行业科研专项(201501003);黄科院科技发展基金资助项目(黄科发201706)

摘　　要：基于前期研究成果,采用资料分析、理论研究等手段,分析了黄河历次"揭河底"现象及影响,介绍了"揭河底"发生的原因与判别条件。指出2017年黄河小北干流陕西合阳县境内发生"揭河底"现象的原因有两点:一是洪水的含沙量大;二是揭底位置处的河道突然缩窄,河道断面流速增大。最后探讨了未来"揭河底"发生的可能性与水沙调控对策。Based on previous research results,this paper analyzed all previous “bottom tearing scouring” phenomenon and the influence by means of data analysis and theoretical research,and introduced that the causes and discriminant conditions of “bottom tearing scouring”. It pointed out that there were two reasons for the phenomenon of “ bottom tearing scouring” in Heyang County of Shaanxi Province in the Long-men-Tongguan Reach of Yellow River in 2017. The first one was high sediment concentration and the second one was the channel suddenly narrowed in the location of “bottom tearing scouring” and the flow velocity of the channel cross-section was increased. Finally,it discussed that the possibility of “ bottom tearing scouring” and the regulation strategy of ＂water and sediment in the future.

关 键 词：“揭河底” 高含沙洪水 临界判别条件 黄河 

分 类 号：TV143[水利工程—水力学及河流动力学] TV882.1