DYNAMICS AND MORPHOLOGY OF SAND BANKS IN THE SURF ZONE OF OUTER TIDAL FLATS
No. 14 (1974), Conference Proceedings
No. 14 (1974)

DYNAMICS AND MORPHOLOGY OF SAND BANKS IN THE SURF ZONE OF OUTER TIDAL FLATS

Conference Proceedings
https://doi.org/10.9753/icce.v14.50
Published 1974-01-29
Harald Gohren
Strom- und Hafenbau Hamburg, Coastal Engineering Research Group "Neuwerk"
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Keywords

tidal flat
sand bank
bank morphology
surf zone

How to Cite

Gohren, H. (1974). DYNAMICS AND MORPHOLOGY OF SAND BANKS IN THE SURF ZONE OF OUTER TIDAL FLATS. Coastal Engineering Proceedings, 1(14), 50. https://doi.org/10.9753/icce.v14.50
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Abstract

Extended sand banks ranging up to some hundred acres with a crest height in the MHW-level are typical structures of the outer tidal flats of the south-eastern North Sea coast (Fig. 1). Primary forms grow up in the surf zone at the sea-side tidal flat border. They are formed like bars and migrate towards the coast with a surprisingly high velocity, up to 150 m/year. The movement is caused by strong erosion on the sea-side slope - which is shaped beach-like - and deposition at the steeper land-side (lee-side) slope. It was found that surf action at the bar is linked with strong unidirectional currents across the crest, Up to 100 cm/s. The currents are most likely generated by wave set-up in front of the bank and by wind-drift water motion.
https://doi.org/10.9753/icce.v14.50
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