Two and three-dimensional shoreline behaviour at a MESO-MACROTIDAL barred beach

Donatus Bapentire Angnuureng*, Rafael Almar, Nadia Senechal, Bruno Castelle, Kwasi Appeaning Addo, Vincent Marieu, Roshanka Ranasinghe

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)

Abstract

The present work investigates cross-shore shoreline migration as well as its alongshore variability (with deformation) on timescales of days to years using 6 years of time-averaged video images. The variability of the shoreline is estimated through empirical statistical methods with comprehensive reference to three scales of variability. At the meso-to macro-tidal barred Biscarrosse beach, shoreline responds in decreasing order at seasonal (winter/summer cycles, 52%), event (storms, 28%) and inter-annual scales. Whereas seasonal evolution is dominated by wave climate modulation, short-term evolution is influenced by tidal range and surf-zone sandbar characteristics. The influence of tide range and sandbars increases when timescale decreases. This is even more the case for the alongshore deformation of the shoreline which is dominated by short-term evolution. An EOF analysis reveals that the first mode of shoreline change time series is associated with cross-shore migration and explains 58% of the shoreline variability. The rest of the modes are associated to deformation which explain 42% of shoreline variability.

Original languageEnglish
Pages (from-to)381-392
Number of pages12
JournalJournal of coastal conservation
Volume21
Issue number3
DOIs
Publication statusPublished - 1 Jun 2017

Keywords

  • Aquitaine coast
  • Biscarrosse beach
  • EOF
  • Event scale
  • Sandbar
  • Seasonal evolution
  • Shoreline change
  • Tide
  • Video imagery

Fingerprint Dive into the research topics of 'Two and three-dimensional shoreline behaviour at a MESO-MACROTIDAL barred beach'. Together they form a unique fingerprint.

Cite this