| 河型转化机理及其数值模拟——Ⅱ.模型应用 |
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| 引用本文： | 周刚,王虹,邵学军,假冬冬,胡德超.河型转化机理及其数值模拟——Ⅱ.模型应用[J].水科学进展,2010,21(2):153-160. |
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| 作者姓名： | 周刚 王虹 邵学军 假冬冬 胡德超 |
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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： | 国家自然科学基金资助项目，"十一五"国家科技支撑计划资助项目 |
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| 摘 要： | 采用平面二维河流数学模型,系统研究概化河道的河型转化过程及其控制因素,成功模拟得到了初始比降、流量、入口含沙量增大和河岸抗冲性减弱时,河流从弯道向分汊、游荡河型转化的过程。根据模拟得到的河道平面形态、横断面形态、河床纵剖面,沿程水面线及沿程输沙率的变化,分析了河床初始比降、入口含沙量、流量和河岸抗冲性等各种因素对河型转化的影响。结果表明,模型计算得到的河型转化过程,与经典的河型成因及河型转化理论给出的趋势较为一致。
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| 关 键 词： | 河型转化 数值模拟 河岸抗冲性 输沙率 分汊河道 |
| 收稿时间： | 2009-05-15 |
Mechanism of channel pattern changes and its numerical simulation: Ⅱ.Application |
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| ZHOU Gang,WANG Hong,SHAO Xue-jun,JIA Dong-dong,HU De-chao.Mechanism of channel pattern changes and its numerical simulation: Ⅱ.Application[J].Advances in Water Science,2010,21(2):153-160. |
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| Authors: | ZHOU Gang WANG Hong SHAO Xue-jun JIA Dong-dong HU De-chao |
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| Affiliation: | State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | In this paper,an improved two dimensional(2-D) numerical model for river flow,sediment transport and bank erosion is presented and applied to study the mechanism of channel pattern changes.The effect of secondary flow at river bends is taken into account in the 2-D model by adding a dispersion stress term in the momentum conservation equation of river flow.The 2-D model simulations were compared with the laboratory experiments conducted in a curved flume,as well as with the field measurements from a long ri... |
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| Keywords: | channel pattern changes numerical model secondary flow bank failure processes suspended load bed load |
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