宁夏黄河游荡型河段泥沙冲淤及河床变形计算  

Calculation and Analysis of Sediment Erosion and Riverbed Deformation in Wandering Sections of the Yellow River in Ningxia

作　　者：周跃华 顾靖超 张红武[3] 陆立国 ZHOU Yuehua;GU Jingchao;ZHANG Hongwu;LU Liguo(Ningxia Flood Control and Drought Relief Headquarters Office,Yinchuan 750001,China;Ningxia Institute of Hydraulic Research,Yinchuan 750021,China;State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]宁夏防汛抗旱指挥部办公室,宁夏银川750001 [2]宁夏水利科学研究院,宁夏银川750021 [3]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《人民黄河》2020年第11期31-36,共6页Yellow River

基　　金：国家重点研发计划项目(2016YFC0402900);2017年宁夏水利厅重点项目(HHERFH-KY-03);国家自然科学基金资助项目(51809143);宁夏自然科学基金资助项目(2018AAC03041)。

摘　　要：选取游荡型河段的汊河区域设置24个实测横断面开展水下根石、泥沙粒度与含沙量监测,分析研究区域的河床变形及根石移动情况。结果表明:水下投放格宾石笼后,右岸受到了保护,水下根石保存基本完整;左岸河床较低,水深和流速较大,出现了崩岸现象,2018年6月28日至11月11日河道向左岸展宽20~80 m;右岸河床较高,水深和平均流速较小,沿横向基本没有变化;整体断面左岸冲刷,其余位置均出现程度不同的淤积,深泓线逐渐从靠近右岸移动到左岸,平均淤积厚度为1.06 m,总淤积量为5.088万m^3,从上游到下游,淤积量和平均淤积厚度呈先上升、后下降的趋势。In this paper,24 measured cross sections were set up to monitor the grain size and sediment content of underwater root stone,and the deformation and movement of root stone were analyzed.The results show that the right bank is protected after the gabion is put into water and the root stone is preserved in water.The river bed on the left bank is relatively lower,the water depth and flow rate are relatively larger and there is a phenomenon of bank collapse.The width of the river is about 20-80 m to the left bank.The riverbed on the right bank is rela⁃tively higher and the water depth and average flow rate are relatively smaller.The overall section shows the left bank erosion and the rest of the positions all show different degrees of siltation.The deep line gradually moves from the right bank to the left bank.The average siltation thickness is 1.06 m and the total siltation volume is 50,888 m^3.The siltation volume and average siltation thickness are increased first and then decreased from upstream to downstream.

关 键 词：护岸工程 泥沙 冲淤 河床变形 黄河宁夏段 

分 类 号：TV871[水利工程—水利水电工程] TV882.1