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

Marc Honnorat; Jerome Monnier; Nicolas Riviere; Etienne Huot; François-Xavier Le Dimet

hal-00380703, version 1

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

Marc Honnorat ¹, Jerome Monnier () ¹, Nicolas Riviere ², Etienne Huot () ³, François-Xavier Le Dimet ¹

Computing and Visualization in Science 13, 3 (2010) 111-119

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.

1: MOISE (INRIA Grenoble Rhône-Alpes / LJK Laboratoire Jean Kuntzmann)
CNRS : UMR5224 – INRIA – Laboratoire Jean Kuntzmann – Université Joseph Fourier - Grenoble I – Institut Polytechnique de Grenoble - Grenoble Institute of Technology
2: Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA)
CNRS : UMR5509 – Université Claude Bernard - Lyon I – Ecole Centrale de Lyon – Institut National des Sciences Appliquées (INSA) - Lyon
3: CLIME (INRIA Rocquencourt)
INRIA – Ecole des Ponts ParisTech

hal-00380703, version 1
http://hal.archives-ouvertes.fr/hal-00380703
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From: Jerome Monnier <>
Submitted on: Monday, 4 May 2009 14:04:31
Updated on: Friday, 22 February 2013 23:40:25

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DOI: 10.1007/s00791-009-0130-8

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