Abstract
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 (WSW-oriented) 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.
| Original language | English |
|---|---|
| Pages (from-to) | 1122-1127 |
| Number of pages | 6 |
| Journal | Journal of Coastal Research |
| Volume | 65 |
| Issue number | SP2 |
| DOIs | |
| Publication status | Published - 2013 |
| Externally published | Yes |
| Event | 12th International Coastal Symposium - Plymouth University, Plymouth, United Kingdom Duration: 9 Apr 2013 → 12 Feb 2014 Conference number: 12 |
Keywords
- ArcGIS
- Bedforms
- Coastal morphology
- DEM
- Drainage channel networks
- LiDAR
- Ridges and runnels
- Tidal and wave-generated currents
- Transport patterns
Programme Area
- Programme Area 5: Nature and Climate