Small scale bedform types off the south-holland coast

S. Meirelles Nunes Da Rocha, Martijn Henriquez, Alejandro J. Souza, Alexander R. Horner-Devine, Julie D. Pietrzak, S. Rijnsburger, Marcel J F Stive

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

This study presents the small scale bedform states found off the South-Holland coast during a 31+ days field observation of seabed acoustic imagery and near the bed velocities. Six main bed states were encountered: current ripples (C), wave ripples (W), combined wave-current ripples (WC), current ripples with subordinate wave ripples (Cw), wave ripples with subordinate current ripples (Wc) and poorly developed ripples (P). Direct visual detection of the bed state from the images showed good agreement with a simple predictor based on the mobility number. The most frequent type of bedform was C which is governed by the tidal currents. Wave ripple prevailed only during a storm with waves higher than 2 m. The combined Cw, WC and Wc types comprised 22% of the occurrences. Poorly developed ripples were associated with the neap tide during fair weather conditions.

Original languageEnglish
Pages (from-to)423-426
Number of pages4
JournalJournal of Coastal Research: an international forum for the Littoral Sciences
Volume1
Issue number75
DOIs
Publication statusPublished - 1 Mar 2016
Event14th International Coastal Symposium - Sydney, Australia
Duration: 6 Mar 201611 Mar 2016
Conference number: 14
http://www.cerf-jcr.org/

Keywords

  • Bedform classification
  • Sand Engine
  • Wave-current bedforms

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