| 伴随数据同化法反演涌潮河口开边界 |
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| 引用本文： | 陈耀登,王如云,李未,卢长娜.伴随数据同化法反演涌潮河口开边界[J].水科学进展,2007,18(6):829-833. |
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| 作者姓名： | 陈耀登 王如云 李未 卢长娜 |
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| 作者单位： | 1.河海大学水文水资源与水利工程科学国家重点实验室, 江苏, 南京, 210098; |
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| 基金项目： | 国家重点实验室基金;教育部科学技术研究重点项目;江苏省普通高等学校高新技术产业化发展项目 |
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| 摘 要： | 构造了非线性守恒型浅水方程的伴随方程,并给出无结构三角网格的开边界校正表达式,利用Godunov格式和Riemann间断解Roe通量格式的设计思想,建立了无结构三角网格有限体积法的伴随开边界反演模型。进行了概化涌潮河口和钱塘江涌潮河口M2分潮开边界反演的数值实验,经过同化得到开边界上振幅的平均误差分别为0.000 6 m和0.053 3 m,证实了本文构造有限体积伴随模型的可行性,也表明本模型能够适应间断解问题。
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| 关 键 词： | 开边界 伴随数据同化 涌潮河口 有限体积法 无结构网格 |
| 文章编号： | 1001-6791（2007）06-0829-05 |
| 收稿时间： | 2006-10-30 |
| 修稿时间： | 2007-02-09 |
Inversing open boundary conditions of tidal bore estuary using adjoint data assimilation method |
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| CHEN Yao-deng,WANG Ru-yun,LI Wei,LU Chang-na.Inversing open boundary conditions of tidal bore estuary using adjoint data assimilation method[J].Advances in Water Science,2007,18(6):829-833. |
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| Authors: | CHEN Yao-deng WANG Ru-yun LI Wei LU Chang-na |
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| Affiliation: | 1.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;2.College of Ocean, Hohai University, Nanjing 210098, China |
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| Abstract: | The adjoint equations of the nonlinear shallow water conservative equations are set up,and the formulas for adjusting the open boundary conditions of unstructured triangular meshes are presented, based on the idea of the Godunov scheme and the Roe's scheme.The adjoint model used to invert the open boundary is founded based on the unstructured triangular meshes and finite volume method.The adjoint model is used to inverse the open boundary conditions of the generalized tidal bore estuary and the Qiantangjiang tidal bore estuary through some iterations.The average errors of amplitude along the open boundary are 0.000 6 m and 0.053 3 m respectively.The results indicate that the adjoint model is viable and adaptable to the discontinuous solutions. |
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| Keywords: | open boundary adjoint data assimilation tidal bore finite volume method unstructured triangular meshes |
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