Coastal Dunes

Dunes within the coastal upland, immediately landward of the active beach.

Glossary of Terms

The average height of the high water over a 19-year period. For shorter periods of observations, corrections are applied to eliminate known variations and reduce the results to the equivalent of a mean 19-year value. All high water heights are included in the average where the type of tide is either semi-diurnal or mixed.

Beach Nourishment

The technique of placing sand fill along the shoreline to widen the beach.

Gravel

Unconsolidated natural accumulation of rounded rock fragments coarser than sand but finer than pebbles (2-4 mm diameter).

Eutrophication

Increased primary production caused by the anthropogenic enrichment of a water body with nutrients. (See also primary production and nutrients ).

Beach

An accumulation of loose sediment (usually sand or gravel) along the coast.

Shingle

Loosely and commonly, any beach material coarser than ordinary gravel, especially any having flat or flattish pebbles.

Strictly and accurately, beach material of smooth, well-rounded pebbles that are not roughly the same size. The spaces betwen pebbles are not filled with finer materials.

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Coastal Dunes