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Identification of equivalent topography in an open channel flow using Lagrangian data assimilation

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Computing and Visualization in Science

Abstract

We present a Lagrangian data assimilation experiment in an open channel flow above a broad-crested weir. The observations consist of trajectories of particles transported by the flow and extracted from a video film, in addition to classical water level measurements. However, the presence of vertical recirculations on both sides of the weir actually conducts to the identification of an equivalent topography corresponding to the lower limit of a surface jet. In addition, results on the identification of the Manning coefficient may allow to detect the presence of bottom recirculations.

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Authors and Affiliations

  1. Lab. Jean Kuntzmann (LJK), INPG, INRIA, B.P. 53, 38041, Grenoble Cedex 9, France

    Marc Honnorat & Jérôme Monnier

  2. LMFA, INSA, Lyon, France

    Nicolas Rivière

  3. INRIA Rocquencourt, Le Chesnay Cedex, France

    Étienne Huot

  4. Lab. Jean Kuntzmann (LJK), UJF, INRIA, B.P. 53, 38041, Grenoble Cedex 9, France

    François-Xavier Le Dimet

Authors
  1. Marc Honnorat
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  2. Jérôme Monnier
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  3. Nicolas Rivière
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  4. Étienne Huot
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  5. François-Xavier Le Dimet
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Correspondence to Marc Honnorat.

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Honnorat, M., Monnier, J., Rivière, N. et al. Identification of equivalent topography in an open channel flow using Lagrangian data assimilation. Comput. Visual Sci. 13, 111–119 (2010). https://doi.org/10.1007/s00791-009-0130-8

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  • DOI: https://doi.org/10.1007/s00791-009-0130-8

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