复杂河网水动力数值模型  

Hydrodynamic model for complex flow in open-channel networks

作　　者：朱德军[1] 陈永灿[1] 王智勇[1] 刘昭伟[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《水科学进展》2011年第2期203-207,共5页Advances in Water Science

基　　金：国家水体污染控制与治理科技重大专项资助项目(2008ZX07207-010-05);国家自然科学基金资助项目(50779026);水利部公益性行业专项经费资助项目(200801008)~~

摘　　要：利用汊点水位预测-校正(junction-point water stage prediction and correction,JPWSPC)法处理缓流河网汊点处的回流效应,采用Preissmann格式离散Saint-Venant方程组,并采用Newton-Raphson方法求解非线性离散方程,构建了非恒定河网水动力模型。模型既无需特殊的河道编码,又避免了建立和求解总体矩阵。与常用的分级解法模型相比,保留了其既适用于树状又适用于环状河网的优点,同时克服了分级解法需要建立和求解河网总体矩阵的缺点,显著提高了稳定性和计算效率。A hydrodynamic model for open-channel networks is established using the newly proposed junction-point water stage prediction and correction（JPWSPC） method,which treats backwater effects at the junctions.In the model,the Saint-Venant equations are discretized using the Preissmann scheme.The resulting equations are solved using the Newton-Raphson method.The model needs neither specific node-numbering nor setting up and solving branch equations.Thus the model is applicable to both dentritic and looped channel networks,and more robust and efficient.

关 键 词：树状河网 环状河网 水动力数值模拟 汊点水位预测-校正法 

分 类 号：TV131.2[水利工程—水力学及河流动力学]