摘要
针对含侧向入流河段的水流泥沙运动特点,在传统方法的基础上给出了一种新的不平衡输沙方程的计算模式,进而建立了一维恒定不平衡输沙数学模型,并用于白鹤滩水库冲淤计算.比较两种不平衡输沙计算模式的结果表明,支流入汇口上下断面形态差别较小时,两种处理方法得到的河床变形基本一致;支流入汇口上下断面形态变化较为剧烈的河段,改进后处理方法的计算结果较好,且符合物理规律,而传统方法计算结果明显违背定性分析结果.
Based on the characteristic of the reach with confluence, an sediment transport equation is brought out and then a numerical model of improved method for non-equilibrium one dimensional steady flow with nonequilibrium sediment transport pattern is established, which has two different calculating modes for non-equilibrium sediment transport equations, i.e. the improved method and the traditional method. This model is applied in Baihetan Reservior for calculating deformation of riverbed, and the results obtained by the two different calculating modes are compared and analyzed. Finally the results show that when the configuration of the two sections is much different, the improved method is more reasonable while the traditional method may give a false result.
出处
《水利水运工程学报》
CSCD
北大核心
2009年第2期9-14,共6页
Hydro-Science and Engineering
基金
国家自然科学基金资助项目(10772137)
国家"973"项目(2003BC415200)
关键词
汇流
不平衡输沙方程
数学模型
confluence
non-equilibrium sediment transport equations
numerical model
