| Preissmann隐式格式在分汊和环状河道中的应用 |
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| 引用本文： | 雷正雄,蒋艳.Preissmann隐式格式在分汊和环状河道中的应用[J].水科学进展,2001,12(4):485-490. |
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| 作者姓名： | 雷正雄 蒋艳 |
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| 作者单位： | 河海大学水文水资源及环境学院, 江苏, 南京, 210098 |
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| 摘 要： | 环状河道在平原地区水系中非常常见,分汊河道也较常见,对这两种河道基于Preissmann格式的水流计算提出了可行的方法。对圣维南方程组进行离散后,用追赶法对各河道进行演算,由水量平衡原理对各结点进行计算,就可求得河道各断面的水流情况。用长江下游江阴至青龙港及杨林段河道的实例进行计算,取得了较为理想的效果。
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| 关 键 词： | 环状河道 分汊河道 Preiss mann格式 水流计算 追赶法 |
| 文章编号： | 1001-6791(2001)04-0485-06 |
| 收稿时间： | 2000-09-17 |
| 修稿时间： | 2000年9月17日 |
Application of the Preissmann Implicit Scheme to Flow Computation for Reticular and Branched River Channels |
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| LEI Zheng-xiong,JIANG Yan.Application of the Preissmann Implicit Scheme to Flow Computation for Reticular and Branched River Channels[J].Advances in Water Science,2001,12(4):485-490. |
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| Authors: | LEI Zheng-xiong JIANG Yan |
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| Institution: | Hohai University, Nanjing 210098, China |
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| Abstract: | River channels are often connected each other to form a reticular river channel or divided into two or more branches in plain areas.The numerical methods based on the Preissmann implicit scheme for flow simulation in these channels are discussed in this paper.After the derivation of the Saint-Venant Equations,water level and discharge of each cross-section are derived by the recursion method and the principle of water balance.The method is proved to be satisfactory when applied to the flow calculation in reach from Jiangyin to qnglonggang and Yanglin in downstream of Yangtze River. |
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| Keywords: | reticular river channel branched channel Preissmann implicit scheme flow computation recursion method |
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