Flow within a trough blowout at Cape Cod

Patrick Hesp, Thomas Smyth, Ian Walker, Paul Gares, Thad Wasklewisz

    Research output: Contribution to journalConference articlepeer-review

    19 Citations (Scopus)


    The Province Lands dunefield at Cape Cod is characterised by large parabolic dunes on which have developed very significant numbers of active saucer and bowl blowouts. Blowouts occur across the entire dune landscape but many are initiated on the high lee margins of large erosional ridges and bowl blowouts within the larger parabolic dune landscape. Evolution of these blowouts is characterised by multiple stages. The first few evolutionary stages are described. In addition, the aerodynamics and flow structure within a trough blowout and former saucer blowout developed within a high ridge crest is elucidated from 2D sonic anemometer data, smoke bombs and videography. The flow is characterised by decreasing then increasing flow up the blowout centreline, and marked, highly turbulent opposed flow separation immediately inside and around the marginal entrance walls of the blowout.

    Original languageEnglish
    Pages (from-to)288-292
    Number of pages5
    JournalJournal of Coastal Research
    VolumeSI 75
    Issue numbersp 1
    Publication statusPublished - 1 Mar 2016


    • Blowout stages
    • Cape Cod
    • Saucer blowout
    • Trough blowout flow dynamics


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