2020年宁蒙河道洪水特点及冲淤变化分析  

Analysis on characteristics of flood and changes of scour and siltation in Ningmeng River in 2020

作　　者：郑艳爽[1] 肖千璐 尚红霞[1] 张晓华[1] Zheng Yanshuang;Xiao Qianlu;Shang Hongxia;Zhang Xiaohua(The Yellow River Water Conservancy Research Institute,Zhengzhou,Henan 450003)

机构地区：[1]黄河水利科学研究院,河南郑州450003

出　　处：《吉林水利》2021年第7期37-40,共4页Jilin Water Resources

基　　金：国家重点研发计划资助项目(2017YFC0404402);中央级公益性科研院所基本科研业务费专项资金资助项目(HKY-JBYW-2020-14,HKY-JBYW-2018-11)。

摘　　要：采用实测资料分析的研究方法,对2020年黄河上游洪水来源以及在通过宁蒙河道时洪水的水沙特点、河道冲淤特点、水位流量关系表现等进行了分析研究。结果表明:2020年汛期黄河上游洪水的水量大、沙量小、持续时间长;洪水对宁蒙河道产生了明显的冲刷作用,宁蒙河道洪水期河道冲刷了0.618亿t;洪水对河道过流能力的恢复作用显著,洪水后内蒙古河段代表水文站同流量(2000m^(3)/s)水位下降0.09-0.16m,该场洪水有利于维持宁蒙河道的排洪排凌能力。By using the method of measured data analysis,the paper studied the source of flood in upper reaches of the Yellow River in 2020,the characteristics of water and sediment,scour and deposition,and the relationship between water and discharge in the upper reaches of the Yellow River in 2020.The results showed that in the flood season of 2020,the flood in the upper reaches of the Yellow River had characteristics of a large amount of water,a small amount of sediment and a long duration.The flood had an obvious scouring effect on the Ningmeng river,which scours 61.8 million tons during the flood period.The flood has a significant effect on the restoration of the river flow capacity.After the flood,the water level of the representative hydrological station in Inner Mongolia(2000m^(3)/s)decreased by 0.09000m^(3)/s 0.16m.The flood is beneficial to maintain the flood discharge capacity of the Ningmeng river.

关 键 词：洪水特点 河道冲淤 过流能力 宁蒙河道 

分 类 号：P333[天文地球—水文科学]