Chapter09 - Coastal Dunes Basic Terminology of Dune...

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1 Coastal Dunes •Basic Terminology of Dune Morphology •Formation •Restoration and artificial stabilization •Example Dune Coasts Wind Deposition Coasts - Dunes a. Sand dunes are common features along sandy coastlines around the world b. The only climatic zone lacking extensive coastal dunes is the frozen Arctic and Antarctic c. Sediment supply is the most crucial factor controlling growth of dunes; lack sufficient loose sediment Toe means the lowest point on a slope of a dune or bluff Dune means a ridge or hill of loose, windblown, or artificially placed earth, the principal component of which is sand NW Denmark Dune Line Crest Blowout Toe Primary dune = most seaward major dune •seaward limit is the landward limit of its fronting beach •landward limit of a primary dune is 25 feet landward of its landward toe. Secondary dune = dune immediately landward of the primary dune •seaward limit of a secondary dune is the landward limit of its fronting primary dune •landward limit of a secondary dune is 25 feet landward of its landward toe
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Chapter09 - Coastal Dunes Basic Terminology of Dune...

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