La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Changes in beach water table elevation during neap and spring tides on a sandy estuarine beach, Delaware Bay, New Jersey
Auteurs :	N. L. Jackson, Auteur ; D. P. Horn, Auteur ; V. Spalding, Auteur ; K. F. Nordstrom, Auteur
Type de document :	Article
Dans :	Estuaries (22(3B) SEP 1999)
Article en page(s) :	753-762
Résumé :	A field investigation of temporal and spatial changes in wind and wave characteristics, runup and beach water table elevation was conducted on the foreshore of an estuarine beach in Delaware Bay during neap (April 9, 1995) and spring (April 16, 1995) tides under low wave-energy conditions. The beach has a relatively steep, sandy foreshore and semi-diurnal tides with a mean range of 1.6 m and a mean spring range of 1.9 m. Data from a pressure transducer placed on the low tide terrace reveal a rate of rise and fall of the water level on April 16 of 0.09 mm s(-1) resulting in a steeper tidal curve than the map tide on April 9. Data from three pressure transducers placed in wells in the intertidal foreshore reveal that the landward slope of the water table during the rising neap tide was lower than the slope during spring tide, and there was a slower rate of fall of the beach Hater table relative to the fall of the tide. Wave heights were lower on April 9 (significant height from 17.1 min records

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