Foredunes and blowouts: initiation, geomorphology and dynamics

Research output: Contribution to journalArticle

446 Citations (Scopus)

Abstract

This paper reviews the initiation, dynamics, geomorphology and evolution of incipient foredunes, established foredunes, and blowouts. Incipient foredunes may be initiated in a variety of ways leading to the formation of ramps, terraces or ridges depending on progradation rates, vegetation type and cover, sediment transport rates and scale of erosional processes. Vegetation cover, morphology, growth rates, and types combine with aerodynamic processes to determine dune and swale morphology. Established foredunes are classified into five morpho-ecological types, and the flow behaviour over two types is detailed. A new model of foredune evolutionary paths at various possible time scales is presented. Blowout initiation, dynamics and sediment transport, and evolution is examined. Throughout the review, the gaps in present understanding of dune processes and a range of ideas for new research possibilities are provided.

Original languageEnglish
Pages (from-to)245-268
Number of pages24
JournalGeomorphology
Volume48
Issue number1-3
DOIs
Publication statusPublished - 1 Nov 2002
Externally publishedYes

Keywords

  • Blowouts
  • Coastal dunes
  • Established foredunes
  • Incipient foredunes

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