EPOC
UMR CNRS 5805 EPOC
Environnements et Paléoenvironnements
Océaniques et Continentaux
Université de Bordeaux  CNRS  Bordeaux-INP  EPHE  OASU

Version Française
HomeNewsJobsAccessLinksSite Map
 
> News > Informations
Consignes de Sécurité et Numéros d'Urgence
(à l'usage des personnels du laboratoire)
Séminaire


Understanding beach recovery capabilities on an intermediate beach after the 2015-2016 El Niño winter in NW Baja California

Date
January 14, 2019  11 am

Lieu
Salle Univers, Bâtiment B18N, OASU, Université de Bordeaux

Intervenant(s)
Amaia Ruiz de Alegria Arzabru, University de Baja California

Résumé
This study investigates the recovery capabilities of a single-barred beach in the Pacific Mexican coast after the energetic 2015? 2016 El Niño winter using concurrent hydrodynamic and subaerial and subtidal morphological data collected over a 4-year period (August 2014?2018). The beach presented a seasonal seaward and landward sandbar migration cycle. The sandbar migrated offshore during the energetic waves between November and February, and onshore during the milder wave period in spring, until welding to the subaerial beach around May. The transfer of sediment towards the subaerial section continued over the summer, expecting a complete recovery by September/October. The subaerial beach recovered 60%, 65% and 100% of the loss sustained during the prior winters in the 2016, 2017 and 2018 summers, respectively. It is concluded that the landward migration process of the sandbar during the spring is critical to ensure a full subaerial beach recovery over the mild wave period in summer. The recovery capabilities of the subaerial beach will depend on the cross-shore distance and depth where the sandbar is located, and on the duration of mild wave conditions required for the sandbar to migrate onshore.
UMR CNRS 5805 EPOC - OASU - Université de Bordeaux
Allée Geoffroy Saint-Hilaire - CS 50023 - 33615 PESSAC CEDEX - FRANCE

| Last update : 18 December 2023 | Contact | Legal Disclaimer | © 2006-2024 EPOC |