Two-dimensional modeling of fine sediment transport with mixed sediment and consolidation: Application to the Gironde Estuary, France

Orseau, Sylvain; Huybrechts, Nicolas; Tassi, Pablo; Bang, Damien Pham Van; Klein, Fabrice

doi:10.1016/j.ijsrc.2019.12.005

Cited by 19 publications

(7 citation statements)

References 26 publications

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“…This modeling approach has been applied to other shallow and vertically well-mixed estuaries [38,39,40,41,2]. The numerical tool has been assessed in applications in several coastal and estuarine cases [42,43,44,45,46]. Two relationships were specified to close the governing equations: a classical squared function dependency on depth-averaged velocity for bed resistance, and the Boussinesq approximation for turbulence parameterization [36].…”

Section: Hydrodynamic Modelmentioning

confidence: 99%

Hydrodynamics of a hyper-tidal estuary influenced by the world's second largest tidal power station (Rance estuary, France)

Rtimi

Sottolichio

Tassi

2021

Estuarine, Coastal and Shelf Science

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Section: Hydrodynamic Modelmentioning

confidence: 99%

Hydrodynamics of a hyper-tidal estuary influenced by the world's second largest tidal power station (Rance estuary, France)

Rtimi

Sottolichio

Tassi

2021

Estuarine, Coastal and Shelf Science

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“…Time-evolution flow discharge hydrographs are imposed upstream of the Gironde Estuary model on the Garonne and Dordogne rivers. The ability of the numerical model to reproduce complex physical processes such as sediment transport is presented in [53].…”

Section: Numerical Configuration and Available Datamentioning

confidence: 99%

Interoperability and computational framework for simulating open channel hydraulics: application to sensitivity analysis and calibration of Gironde Estuary model

Goeury,

Audouin,

Zaoui

2020

Preprint

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Water resource management is of crucial societal and economic importance, requiring a strong capacity for anticipating environmental change. Progress in physical process knowledge, numerical methods and computational power, allows us to address hydro-environmental problems of growing complexity. Modeling of river and marine flows is no exception. With the increase in IT resources, environmental modeling is evolving to meet the challenges of complex real-world problems. This paper presents a new distributed Application Programming Interface (API) of the open source telemac-mascaret system to run hydro-environmental simulations with the help of the interoperability concept. Use of the API encourages and facilitates the combination of worldwide reference environmental libraries with the telemac-mascaret system. Consequently, the objective of the paper is to promote the telemac-mascaret system for studies dealing with such issues as uncertainty propagation, global sensitivity analysis, optimization, multi-physics or multi-dimensional coupling. To illustrate the capability of the API, an operational problem for improving the navigation capacity of the Gironde Estuary is presented. The API potential is demonstrated in a re-calibration context. The API is used for a multivariate sensitivity analysis to quickly reveal the most influential parameters which can then be optimally calibrated with the help of a data assimilation technique. Software availabilityThe Application Programing Interface (API) Framework described in this article is available for download in telemac-mascaret system (www.opentelemac.org). telemac-mascaret is an integrated suite of solvers for use in the field of free-surface flow, available under the GNU General Public License version 3.

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“…However, it is necessary to note that this type of calculation has been little explored on such complex morphologies specific to Piedmont rivers. Most simulations considering sediment transport with this model have been carried out on laboratory cases or real case studies with lower slopes and/or simpler morphologies (Lepesqueur et al, 2019;Orseau et al, 2021). Thus, it is interesting to evaluate the model's performance on such kind of complex morphology.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of the evolution of a river reach with a complex morphology to help define future sustainable restoration decisions

Yassine

Cassan

Roux

et al. 2022

Preprint

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Abstract. The evolution of river morphology is very complicated to predict, especially in the case of mountain and Piedmont rivers with complex morphologies, steep slopes, and heterogeneous grain sizes such as the "Lac des Gaves" (LDG) reach, located within the Gave de Pau river in the Hautes-Pyrénées department, France, has precisely the complex morphological characteristics mentioned above. This reach has gone through severe sediment extractions for over 50 years, leading to the construction of two weirs for riverbed stabilisation. Two large floods resulted in changes in the LDG's hydromorphological characteristics as it went from a single channel river section to a braided river reach. In this study, a 2D hydromorphological model is developed with the TELEMAC-MASCARET system to reproduce the evolution of the channel following a flood that occurred in 2018. The model's validity is assessed by comparing the simulated topographic evolution to the observed one. The results reveal the challenge of choosing well-fitted sediment transport equations and friction laws that would make it possible to reproduce such complex morphology. Even if the exact localisation of the multiple channels forming the braided nature of the LDG was challenging to reproduce, our model could provide reliable volumetric predictions as it reproduces the filling of the LDG correctly. The influence of the two weirs on the river's current and future morphology is also studied. The aim is to provide decision-makers with more reliable predictions to design suitable restoration measures for the LDG reach.

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Two-dimensional modeling of fine sediment transport with mixed sediment and consolidation: Application to the Gironde Estuary, France

Cited by 19 publications

References 26 publications

Hydrodynamics of a hyper-tidal estuary influenced by the world's second largest tidal power station (Rance estuary, France)

Hydrodynamics of a hyper-tidal estuary influenced by the world's second largest tidal power station (Rance estuary, France)

Interoperability and computational framework for simulating open channel hydraulics: application to sensitivity analysis and calibration of Gironde Estuary model

Numerical modelling of the evolution of a river reach with a complex morphology to help define future sustainable restoration decisions

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