| 复杂河网水动力数值模型 |
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| 引用本文： | 朱德军,陈永灿,王智勇,刘昭伟.复杂河网水动力数值模型[J].水科学进展,2011,22(2):203-207. |
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| 作者姓名： | 朱德军 陈永灿 王智勇 刘昭伟 |
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| 作者单位： | 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 |
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| 基金项目： | 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)~~ |
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| 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.
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| 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 |
| 收稿时间： | 2010-05-07 |
Hydrodynamic model for complex flow in open-channel networks |
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| ZHU De-jun,CHEN Yong-can,WANG Zhi-yong,LIU Zhao-wei.Hydrodynamic model for complex flow in open-channel networks[J].Advances in Water Science,2011,22(2):203-207. |
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| Authors: | ZHU De-jun CHEN Yong-can WANG Zhi-yong LIU Zhao-wei |
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| Affiliation: | State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | 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 ... |
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| Keywords: | dentritic channel networks looped channel networks hydrodynamic simulation junction-point water stage prediction and correction(JPWSPC) method |
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