引海水冲刷黄河下游河槽的数学模型计算研究  

Numerical simulation of degradation of the lower Yellow River by diverting sea water

作　　者：张红武[1] 李东风[2] 钟德钰[1] 

机构地区：[1]清华大学黄河研究中心,北京100084 [2]浙江水利水电专科学校

出　　处：《泥沙研究》2005年第3期48-55,共8页Journal of Sediment Research

基　　金：国家自然科学基金委员会;水利部黄河水利委员会黄河联合研究基金项目(批准号:50339020)

摘　　要：利用本河段典型的长系列的水沙过程,从典型断面的河床冲淤、河道水位等方面对准二维非恒定水动力学泥沙数学模型,进行了验证计算,在此基础上开展了“引海水冲刷黄河下游河槽”模拟计算。其结果表明,注入海水后有明显的冲刷河槽效果。例如,在引海水1000m3/s和黄河典型来水来沙的组合条件下,注入点(西河口)以下河道沿程冲刷65km,3000m3/s时水面比降变化幅度为5.9‰～10.1‰;注入点以上溯源冲刷121km,注入点附近3000m3/s时水位降低最大值为2m左右。Degradation of the Lower Yellow River by diverting sea water was modeled by aqusi_two_dimensional numerical model. The simulation shows that obvious erosion occurred backwards and forwards at the point where sea water was poured into. Under typical hydrograph combined with the diverted sea water flow of 1000m^3/s, the erosion developed with a length of 65km downstream and 121km upstream the pouring point with surface slope varying in the range 5.9‰ ～10.1‰,The maximum reduction of water level approaches about 2m.

关 键 词：黄河 海水 泥沙 冲刷 数学模型 

分 类 号：TV143[水利工程—水力学及河流动力学]