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Theses

Modélisation dans un estuaire à marée. Rôle du bouchon vaseux dans la tenue des sols sous marins.

Abstract : Thesis report is concerning the modelling of vertical sedimentary processes in estuaries (deposition, consolidation, erosion). These research works have been carried out with the civil engineering aspect. This research is developed in respect with the folIowing parts:
- Analysis of usual sediment dynamics models ;
- Adaptation of models used and issued from other science areas ;
- Development of new models.
The proposed models take into account the mechanical phenomena with the typical properties. These properties are defined by simple laws which depend on the temperature and the dry density. This approach simplifies a multi-parameters hydro-sedimentary modelling. All models are adjusted for the Loire estuary mud, but can be used for other sites. A settlement model is also developed with the vertical soil mechanics aspects. The suspension's sedimentation is simulated as a particular case without affective stresses conditions.
A multi-layers iso-dry density model is described for the vertical beds dynamics. This model offers the possibility to appreciate the dry density above which the mud is gathering near the bed to give a pseudo-plastic suspension.
Also rheological tests have been performed on Loire estuary mud. These tests results show the temperature's influence on the mud yield stress which is governing the erosion.
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Contributor : Martin Sanchez Angulo <>
Submitted on : Wednesday, February 25, 2009 - 4:23:39 PM
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  • HAL Id : tel-00364316, version 1

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Martin Sanchez Angulo. Modélisation dans un estuaire à marée. Rôle du bouchon vaseux dans la tenue des sols sous marins.. Sciences de l'ingénieur [physics]. Université de Nantes, 1992. Français. ⟨tel-00364316⟩

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