2010年汛前调水调沙小浪底水库排沙比分析  

Analysis of Density Current Flush in Xiaolangdi Reservoir During 2010 Pre-Flood Water and Sediment Regulation

作　　者：马怀宝[1] 张俊华[1] 陈书奎[1] 王婷[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》2011年第9期1-2,76,共3页Yellow River

基　　金：水利部公益性行业科研专项(200801024;200901015);中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2007-09)

摘　　要：依据实测资料,从洪水过程、边界条件、水库运用等方面分析了2010年汛前调水调沙小浪底水库异重流排沙比偏高的原因:一是三门峡水库蓄水量大,塑造的洪水过程流量大、历时长;二是对接水位接近小浪底水库淤积三角洲顶点,使得三角洲顶坡段发生沿程冲刷及溯源冲刷;三是在三门峡水库泄空期间,潼关断面流量较大且历时较长。Based on the observed date,from the aspects of flood process,boundary conditions,reservoir operation and so on,this paper studies the reason of high flush ratio of density current in Xiaolangdi Reservoir during pre-flood water and sediment regulation in 2010.Firstly,Sanmenxia Reservoir has large water storage,and therefore,it can model a flood process with large discharge and long duration.Secondly,when discharge released from Sanmenxia Reservoir began to increase,the water level of Xiaolangdi Reservoir approached delta peak,which caused a large quantity of streamwise erosion and headward erosion in delta top slope.Thirdly,when Sanmenxia Reservoir was in emptying period,there was a bigger discharge and a longer duration happened in Tongguan cross section.

关 键 词：排沙比 异重流 调水调沙 2010年 汛前 小浪底水库 

分 类 号：P333[天文地球—水文科学]