Bathymetry Reconstruction Using Inverse ShallowWater Models: Finite Element Discretization and Regularization
Bathymetry Reconstruction Using Inverse ShallowWater Models: Finite Element Discretization and Regularization
复制标题
使用反浅水模型进行测深重建:有限元离散化和正则化
DOI:
10.1007/978-3-030-30705-9_20
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
V. Aizinger
中科院分区:
文献类型:
--
作者:
H. Hajduk;D. Kuzmin;V. Aizinger
In the present paper, we use modified shallow water equations (SWE) to reconstruct the bottom topography (also called bathymetry) of a flow domain without resorting to traditional inverse modeling techniques such as adjoint methods. The discretization in space is performed using a piecewise linear discontinuous Galerkin (DG) approximation of the free surface elevation and (linear) continuous finite elements for the bathymetry. Our approach guarantees compatibility of the discrete forward and inverse problems: for a given DG solution of the forward SWE problem, the underlying continuous bathymetry can be recovered exactly. To ensure well-posedness of the modified SWE and reduce sensitivity of the results to noisy data, a regularization term is added to the equation for the water height. A numerical study is performed to demonstrate the ability of the proposed method to recover bathymetry in a robust and accurate manner.
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DOI:
10.1016/j.camwa.2018.03.045
发表时间:
2018
期刊:
Comput. Math. Appl.
影响因子:
--
作者:
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2009
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DOI:
10.1016/j.camwa.2016.08.006
发表时间:
2016-02
期刊:
Comput. Math. Appl.
影响因子:
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作者:
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通讯作者:
Balthasar Reuter;V. Aizinger;Manuel Wieland;F. Frank;P. Knabner
DOI:
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发表时间:
2013
期刊:
影响因子:
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作者:
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通讯作者:
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DOI:
10.1016/j.envsoft.2018.01.003
发表时间:
2018
期刊:
Environ. Model. Softw.
影响因子:
--
作者:
H. Hajduk;B.R. Hodges;V. Aizinger;B. Reuter
通讯作者:
B. Reuter