| 张晓波,闪丽洁,张瑶兰.追赶法在含闸分洪河道水动力计算中的改进研究[J].中国水利水电科学研究院学报,2023,21(1):10-22 |
| 追赶法在含闸分洪河道水动力计算中的改进研究 |
| Study on improvement of chasing method in hydrodynamic calculation of flood diversion channel with sluice gates |
| 投稿时间：2022-05-13 |
| DOI：10.13244/j.cnki.jiwhr.20220209 |
| 中文关键词: 洪水预报 水动力学 圣维南方程组 树状河网 分洪河道 追赶法 |
| 英文关键词:flood prediction hydrodynamics Saint-Venant Equation tree-type river network flood diversion channels chasing method |
| 基金项目:浙江省水利厅重点科技项目(RB1804) |
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| 摘要点击次数: 160 |
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| 中文摘要: |
| 基于追赶法的Preissmann隐式格式是对圣维南方程组进行离散的常见方法,然而在包含有分洪闸等具有分洪功能的河道水动力计算中,难以用传统的追赶法直接进行求解。本文针对分洪河道中闸门的不同出流情况,对传统追赶法进行改进。首先将分洪河道断面反向编码,将流出河道改为流入河道,形成适用于传统追赶法计算思路的一般树状河网结构;然后,针对分洪闸不同出流方式,分别讨论与之对应的模型概化的方法,通过采取河网分割、边界类型转换衔接等方法进行特殊处理,实现与传统树状河网计算思路的统一;最后,以东苕溪流域为例进行实例分析,结果表明文中所提处理方法合理,模型模拟效果较好,可有效解决含闸分洪河道的树状河网水利计算问题,便于推广应用。 |
| 英文摘要: |
| The Preissmann Implicit Scheme based on the Chasing Method is one of the methods used commonly to discretize Saint-Venant Equation.However,it is difficult to use the traditional Chasing method to directly solve the hydrodynamic calculation of flood diversion channel with sluice gates.In this paper,the traditional Chasing method was improved according to different outflow situations of gates in flood diversion channels.Firstly,the sections of flood diversion channel were reversely coded to form a general treelike river network structure suitable for the traditional Chasing method.Secondly,according to the different outflow modes of flood diversion gates,the corresponding model generalization methods were discussed.The unification with the traditional tree river network calculation idea was realized by adopting the methods of river network segmentation and boundary type conversion and convergence.With Dongtiaoxi watershed as an example,the results showed that the treatment method proposed in this paper is reasonable,and it is convenient for popularization and application. |
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