网河区水沙耦合河流数学模型初步研究  

Preliminary study of 1D coupled flow and sediment mathematical model of river networks

作　　者：赖永辉[1,2] 谈广鸣[2] 

机构地区：[1]广东水利电力职业技术学院,广东广州510635 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《泥沙研究》2010年第5期72-76,共5页Journal of Sediment Research

基　　金：国家"973"项目(2003CB415200);广东水利电力职业技术学院中青年科研基金项目(200808005)

摘　　要：在对一维浑水水沙控制方程组进行系列推导,求解出其简化表达式的基础上,利用Preissmann四点偏心隐格式和三级联解法对方程组进行离散求解,建立了网河区一维水沙耦合河流数学模型。为检验模型的实用性及其计算精度,将模型的计算结果与普通河流水沙模型计算结果以及实测结果进行了对比分析,结果表明水沙耦合河流数学模型计算结果与实测结果吻合良好,而在部分断面的水位计算中,其计算结果比普通河流水沙数学模型更接近于实测值。On the basis of a series of ratiocinations of a 1D coupled flow and sediment control equations and its predigested expressions,through dispersing of its control equations due to the application of Preissmann four-point eccentricity covered dispersing format and the introduction of third-class combing solution,a 1D coupled flow and sediment mathematical model of river networks is established.In order to test the practicability and the precision of this model,its calculation result is compared with the field data.The comparison shows that the model is proved to be feasible because of the approximation with the field data.Moreover,the calculated results of water level at some sections were closer to the measured ones than the decoupled model.

关 键 词：水沙 耦合 数学模型 

分 类 号：TV147[水利工程—水力学及河流动力学]