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1 April 2013 Oblique second-order sand transport pathways on an intertidal sand flat in a natural tidal inlet system
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Abstract

Ernstsen, V.B., Lefebvre, A., Kroon, A. and Niemann, S.L., 2013. Oblique second-order sand transport patterns on an intertidal sand flat in a natural tidal inlet system. In: Conley, D.C., Masselink, G., Russell, P.E. and O'Hare, T.J. (eds.)

A detailed digital elevation model (DEM) of an intertidal sand flat in the Knudedyb tidal inlet in the Danish Wadden Sea, derived from high-resolution Light Detection And Ranging (LiDAR) data, reveals a large elongated bedform field with complex bedform morphologies and drainage channel networks. This indicates distinct second-order sand transport pathways oblique to the main tidal transport pathways. A conceptual model for the development of the bedforms and channels is presented, which comprises hypotheses of the hydrodynamic forcing of the different second-order sand transport pathways. During flood tide, sand is transported along ESE-oriented pathways across the intertidal flat towards the inner tidal basin. During the late stages of ebb tide, sand is transported in drainage channels (WSWoriented) from the intertidal flat towards the inlet channel. During storm events with winds from SW, wave-generated currents transport sand along a NE-oriented transport pathway from the inlet channel towards the intertidal flat.

© 2013 Coastal Education and Research Foundation
Verner B. Ernstsen, Alice Lefebvre, Aart Kroon, and Sanne Lina Niemann "Oblique second-order sand transport pathways on an intertidal sand flat in a natural tidal inlet system," Journal of Coastal Research 65(sp2), 1122-1127, (1 April 2013). https://doi.org/10.2112/SI65-190.1
Received: 7 December 2012; Accepted: 6 March 2013; Published: 1 April 2013
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