The Importance of Combined Tidal and Meteorological Forces for the Flow and Sediment Transport on Intertidal Shoals

P.L.M. de Vet, B.C. van Prooijen, R.A. Schrijvershof, J.J. van der Werf, T. Ysebaert, M.C. Schrijver, Z.B. Wang

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4 Citations (Scopus)

Abstract

Estuarine intertidal areas are shaped by combined astronomical and meteorological forces. This paper reveals the relative importance of tide, surge, wind, and waves for the flow and sediment transport on large intertidal shoals. Results of an intensive field campaign have been used to validate a numerical model of the Roggenplaat intertidal shoal in the Eastern Scheldt Estuary, the Netherlands, in order to identify and quantify the importance of each of the processes over time and space. We show that its main tidal creeks are not the cause for the dominant direction of the net flow on the shoal. The tidal flow over the shoal is steered by the water level differences between the surrounding channels. Also during wind events, the tidal flow (enhanced by surge) is dominant in the creeks. In contrast, wind speeds of order 40 times the typical tidal flow velocity are sufficient to completely alter the flow direction and magnitude on an intertidal shoal. This has significant consequences for the sediment transport patterns. Apart from this wind-driven flow dominance during these events, the wind also increases the bed shear stress by waves. For the largest intertidal part of the Roggenplaat, only ∼1–10% of the yearly transport results from the 50% least windy tides, even if the shoal is artificially lowered half the tidal range. This dominance of energetic meteorological conditions in the transports matches with field observations, in which the migration of the creeks and high parts of the shoal are in line with the predominant wind direction.

Original languageEnglish
Pages (from-to)2464-2480
JournalJournal of Geophysical Research: Earth Surface
Volume123
Issue number10
Early online date20 Sep 2018
DOIs
Publication statusPublished - Oct 2018

Fingerprint

shoals
sediment transport
Sediment transport
Tides
tides
tide
flow nets
tidal range
bottom stress
Estuaries
estuaries
wind direction
Water levels
Netherlands
Flow velocity
flow velocity
shear stress
Shear stress
Numerical models
wind speed

Keywords

  • hydrodynamics
  • intertidal area
  • morphology
  • numerical model
  • sediment transport
  • wind

Cite this

de Vet, P. L. M., van Prooijen, B. C., Schrijvershof, R. A., van der Werf, J. J., Ysebaert, T., Schrijver, M. C., & Wang, Z. B. (2018). The Importance of Combined Tidal and Meteorological Forces for the Flow and Sediment Transport on Intertidal Shoals. Journal of Geophysical Research: Earth Surface, 123(10), 2464-2480. https://doi.org/10.1029/2018JF004605
de Vet, P.L.M. ; van Prooijen, B.C. ; Schrijvershof, R.A. ; van der Werf, J.J. ; Ysebaert, T. ; Schrijver, M.C. ; Wang, Z.B. / The Importance of Combined Tidal and Meteorological Forces for the Flow and Sediment Transport on Intertidal Shoals. In: Journal of Geophysical Research: Earth Surface. 2018 ; Vol. 123, No. 10. pp. 2464-2480.
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de Vet, PLM, van Prooijen, BC, Schrijvershof, RA, van der Werf, JJ, Ysebaert, T, Schrijver, MC & Wang, ZB 2018, 'The Importance of Combined Tidal and Meteorological Forces for the Flow and Sediment Transport on Intertidal Shoals', Journal of Geophysical Research: Earth Surface, vol. 123, no. 10, pp. 2464-2480. https://doi.org/10.1029/2018JF004605

The Importance of Combined Tidal and Meteorological Forces for the Flow and Sediment Transport on Intertidal Shoals. / de Vet, P.L.M.; van Prooijen, B.C.; Schrijvershof, R.A.; van der Werf, J.J.; Ysebaert, T.; Schrijver, M.C.; Wang, Z.B.

In: Journal of Geophysical Research: Earth Surface, Vol. 123, No. 10, 10.2018, p. 2464-2480.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - de Vet, P.L.M.

AU - van Prooijen, B.C.

AU - Schrijvershof, R.A.

AU - van der Werf, J.J.

AU - Ysebaert, T.

AU - Schrijver, M.C.

AU - Wang, Z.B.

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KW - hydrodynamics

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KW - morphology

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KW - sediment transport

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JF - Journal of Geophysical Research: Earth Surface

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