High-resolution numerical modelling of the barotropic tides in the Gulf of Gabes, eastern Mediterranean Sea (Tunisia)

Achref Othmani 1 Béchir Béjaoui 1 Cristele Chevalier 2 Dalila Elhmaidi 3 Jean-Luc Devenon 4, 2 Lotfi Aleya 5
1 Institut National des Sciences et Technologies de la Mer [Salammbô]
2 MIO - Institut méditerranéen d'océanologie
3 Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis, Tunisia
4 LOB - Laboratoire d'océanographie et de biogéochimie
5 LCE - Laboratoire Chrono-environnement
Abstract : A high-resolution 2D barotropic tidal model was developed for the Gulf of Gabes and used to characterise hydrodynamic processes and tidal dynamics. The model is based on the Regional Ocean Modelling System. It is forced at the open boundaries by the semidiurnal M2 and S2 astronomical components while meteorological forcing has been neglected. The model results show good agreement with observations confirming that it reproduces the gulf's main tidal characteristics reasonably well. In fact, the simulated semidiurnal tidal components M2 and S2 generate important sea level variations and coastal currents. Tidal propagation is directed to the gulf's western sector while tidal resonance occurs in its inner sector where the M2 and S2 amplitudes are about 50 and 36 cm, respectively. Phase maxima (170°-185°) are located inside Boughrara Lagoon for both the simulated M2 and S2 tides. The strongest currents are found in shallow coastal regions and at the lagoon's western inlet. During spring tides, currents are around 10-20 cm s-1 in the gulf center and up to 50 cm s-1 inside the lagoon
Keywords : High resolution Gulf of Gabes Tide Hydrodynamics Numerical modelling
Type de document :
Article dans une revue
Journal of African Earth Sciences, Elsevier, 2017, 129, pp.224 - 232. 〈10.1016/j.jafrearsci.2017.01.007〉
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https://hal-amu.archives-ouvertes.fr/hal-01621978
Contributeur : Valerie Michotey <>
Soumis le : lundi 23 octobre 2017 - 21:57:24
Dernière modification le : jeudi 15 mars 2018 - 16:56:06

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UNIV-AMU | UNIV-FCOMTE | OSU-INSTITUT-PYTHEAS | LOPB | INSU | CHRONO-ENVIRONNEMENT | MIO

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Achref Othmani, Béchir Béjaoui, Cristele Chevalier, Dalila Elhmaidi, Jean-Luc Devenon, et al.. High-resolution numerical modelling of the barotropic tides in the Gulf of Gabes, eastern Mediterranean Sea (Tunisia). Journal of African Earth Sciences, Elsevier, 2017, 129, pp.224 - 232. 〈10.1016/j.jafrearsci.2017.01.007〉. 〈hal-01621978〉

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