TY - JOUR

T1 - Oblique second-order sand transport pathways on an intertidal sand flat in a natural tidal inlet system

AU - Ernstsen, Verner Brandbyge

AU - Lefebvre, Alice

AU - Kroon, Aart

AU - Niemann, Sanne Lina

N1 - Special Issue 65 - ICS 2013 Proceedings (Plymouth, United Kingdom) [Conley]

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

M3 - Journal article

SP - 1122

EP - 1127

JO - Journal of Coastal Research

JF - Journal of Coastal Research

SN - 0749-0208

IS - SI65

Y2 - 8 April 2013 through 12 April 2013

ER -