黄河汛前调水调沙小浪底水库减淤影响因素分析  

An Analysis of the Influencing Factors of Silt Reduction in the Yellow River Pre-flood Water and Sediment Regulation in Xiaolangdi Reservoir

作　　者：李昆鹏[1] 马怀宝[1] 郜国明[1] 樊文玲[1] 

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

出　　处：《中国农村水利水电》2015年第4期73-76,81,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51179072;51309110);中央级公益性科研院所基本科研业务费专项项目(HKY-JBYW-2014-12);水利部黄河泥沙重点实验室开放基金项目(2013007);水利部公益性行业专项项目(201401023)

摘　　要：针对小浪底库区顶坡段冲刷形成的异重流和三门峡水库排沙形成的异重流这两个不同成因的异重流,通过水库边界条件、入库水沙条件、水库调度等因素分析,探讨了其各自的形成及其能达到小浪底水库减淤作用的条件和机理。结果表明:三门峡水库前期蓄水量及清水大流量泄放过程对小浪底水库异重流前锋形成及排沙起着关键作用;对接水位接近或低于小浪底水库淤积三角洲顶点高程,与三门峡水库大流量下泄过程相对应时,可提高冲刷型异重流的排沙效果;三门峡水库从加大泄量开始到基本泄空期间,尽可能降低小浪底水库库水位。According to the Xiaolangdi Reservoir top slope erosion formation and Sanmenxia formation reservoir sediment density cur‐rent density current two flushing process ,through storage reservoir boundary conditions ,the conditions of water and sediments ,res‐ervoir operation of factor analysis ,discusses the Xiaolangdi Reservoir density current siltation reduction can be achieved when the shaping process .The results show that ：Sanmenxia reservoir water storage capacity and water-flow discharge process plays a key role in the Xiaolangdi Reservoir density current striker formation and sand ;The docking level near or below the Xiaolangdi Reservoir delta vertex elevation ,Sanmenxia Reservoir of large volume discharge process is corresponding ,can improve the flushing effect of density current and flow ;Sanmenxia Reservoir from increasing discharge to basic emptying period ,reduce the Xiaolangdi reservoir water level as far as possible .

关 键 词：小浪底水库 调水调沙 异重流排沙 水库调度 

分 类 号：TV145.22[水利工程—水力学及河流动力学]