一二维耦合河网水沙模型研究  

Coupled One and Two Dimensional Model for River Network Flow and Sediment Transport

作　　者：吕文丽[1] 张旭 

机构地区：[1]广东省水利水电科学研究院,广州510610 [2]珠江水利委员会综合技术中心,广州510611

出　　处：《南水北调与水利科技》2011年第3期79-83,共5页South-to-North Water Transfers and Water Science & Technology

摘　　要：借鉴河网水流的三级解法,将二维河段概化为河网内部河段,通过河网节点流量和输沙量的平衡,建立一二维耦合河网水沙模型。模型采用全隐式方法建立二维河段以首末断面的水位和含沙量为中间变量的矩阵追赶关系,进而建立整个一二维河网的节点水位及含沙量的矩阵方程组。对方程组的求解,可实现一二维水沙模型的耦合求解。通过对长江下游大通至镇江概化河网的验证计算,表明模型具有很好的实用价值。Based on previous research, a new one and two-dimensional coupled model of river water and sediment was proposed. With reference to the three-level solution for one-dimensional river network water mode, the two-dimensional river section will be generalized to river section within the river network. One and two dimensional coupled river network sediment model will be established with the balance of flow amount and sediment transport. The model sets up the chasing relationship between variables of water level and sediment content at the end and first section to further establish matrix equations of the whole one and two-di- mensional river network node water level and sediment content. Though the verification and calculation for generalized river network from Datong to Zhenjiang in the lower reaches of the Yangtze River, it is found that the model is of great practical value

关 键 词：一二维耦合 河网 水沙模型 矩阵追赶法 分组泥沙 交错网格 

分 类 号：TV143[水利工程—水力学及河流动力学]