作　　者： ; ; ; ;

机构地区： 清华大学土木水利学院水利水电工程系

出　　处： 《水利学报》 2003年第4期1-7,共7页

摘　　要： 本文首先简要回顾了以往黄河河道泥沙数学模型研究成果,再以水流运动方程及经过作者修正的泥沙运动方程为基础,同时引入与实测资料相符合的水流挟沙力、动床阻力、泥沙级配等计算公式作为补充方程,构造出黄河下游河道准二维泥沙数学模型。然后,采用1986年11月～1996年10月这10年长系列实测资料,开展了验证计算。其结果表明,该模型不仅能计算黄河下游河道一般洪水引起的河床冲淤变形,还能成功地模拟出大沙年下游处于强烈淤积时的规律。 After a brief review of the previous studies on the mathematical modeling of river morphology for the Yellow River, a new quasitwo dimensional mathematical model was established based on the quasi2D flow equation and the sediment transport equation modified by the authors. In this model, formulas such as sediment transport capacity, resistance on movable bed and bed material composition, verified by field data, were used. As a test case, a longterm morphological process in the Lower Yellow River for a period of 10 years from Nov. 1986 to Oct. 1996 was simulated. The comparison between the calculation and observation shows that the proposed model is successful not only in simulating ordinary floods and corresponding morphological process, but also in modeling extreme circumstance of flood carrying hyperconcentrated sediment.

关 键 词： 黄河下游河道 数学模型 河床冲淤 泥沙运动

领　　域： [水利工程]