Article Dans Une Revue Journal of Coastal Research Année : 2020

On the natural and anthropogenic drivers of the Senegalese (West Africa) low coast evolution: Saint Louis Beach 2016 COASTVAR experiment and 3D modeling of short term coastal protection measures

Patrick Marchesiello

Résumé

West Africa's low and densely populated coasts crystallize most of the environmental and societal problems and resulting vulnerability. It is becoming urgent to document this coast and the natural and anthropogenic forces to understand its evolution. Saint Louis is a historic (World Heritage) city located on the Langue de Barbarie, a 10 km sandspit at the mouth of the Senegal River. Because of its location, it is vulnerable (erosion, flooding) to river and ocean variability. This intermediate barred microtidal beach is located in a storm-free intertropical environment, but is exposed to distant oblique energetic waves from high latitudes, causing one of the highest coastal drifts in the world (∼800,000 m3/year). As part of the COASTVAR project, an intensive international field experiment was conducted in Saint Louis from 4 to 13 December 2016 to quantify the natural protective role played by the sandbar, coastal currents and transient exchanges with the inner shelf. Many instruments have been deployed to measure waves, currents, bathymetry and topography. This article provides an overview on the objectives of the experiment, the deployment and the first results of the modeling of coastal protection strategy

Fichier principal
Vignette du fichier
Ndour2020.pdf (442.23 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-02903783 , version 1 (18-03-2025)

Licence

Identifiants

Citer

Abdoulaye Ndour, Khadidja Bâ, Rafael Almar, Luis Pedro Almeida, Mohammad Sahid Sall, et al.. On the natural and anthropogenic drivers of the Senegalese (West Africa) low coast evolution: Saint Louis Beach 2016 COASTVAR experiment and 3D modeling of short term coastal protection measures. Journal of Coastal Research, 2020, 95 (sp1), pp.583-587. ⟨10.2112/SI95-114.1⟩. ⟨hal-02903783⟩
976 Consultations
140 Téléchargements

Altmetric

Partager

  • More