Evaluation of a tidal flat sediment nourishment as estuarine management measure

Werf, van der J.J.; Reinders, J.; Rooijen, van A.; Holzhauer, Harriette; Ysebaert, Tom

doi:10.1016/j.ocecoaman.2015.06.006

Cited by 19 publications

(18 citation statements)

References 15 publications

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“…These, partly independent, temporal fluctuations shall have consequences for the long-term evolution of intertidal shoals. As sediment transport on the relatively sandy Roggenplaat takes place especially during energetic meteorological events (Figure 15), as also observed on other intertidal areas (e.g., Green et al, 1997;Van der Werf et al, 2015), those events are likely fundamental for the morphological evolution of such a shoal.…”

Section: Temporal Variationsmentioning

confidence: 72%

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

et al. 2018

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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.

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Section: Temporal Variationsmentioning

confidence: 72%

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

et al. 2018

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“…Successful marsh restoration projects may request temporarily opening upstream river dams or creating river diversions to direct sediment-rich water into managed marsh systems (Mariotti & Fagherazzi, 2013;Nittrouer et al, 2012). When these watershed-scale operations are not feasible, local sediment-nourishment operations that increase tidal flat convexity can be considered to accommodate seedling establishment (Baptist et al, 2019;van der Werf et al, 2015). Unlike sandy beaches, where nourishment is a common practice (Stive et al, 2013), nourishing muddy tidal flats using dredged sediment remains relatively unexplored.…”

Section: Conclusion and An Outlook For Coastal Wetlands Restorationmentioning

confidence: 99%

Mechanistic Modeling of Marsh Seedling Establishment Provides a Positive Outlook for Coastal Wetland Restoration Under Global Climate Change

Borsje

Belzen

et al. 2021

Geophysical Research Letters

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“…Essentiële kennis werd gegenereerd in de deelprojecten Suppletiestrategieën, de ANT (Autonome Neerwaartse Trend Oosterschelde) Studie (de Ronde et al 2013) en het programma Building with Nature (Witteveen en Bos, 2011). Daarnaast werd ook een aantal praktijkproeven uitgevoerd: Proefsuppletie Galgeplaat ( Van der Werf et al, 2015), Cascadeproef Schelphoek, Veiligheidsbuffer Oesterdam (Boersema et al 2019) en Duinvoetsuppletie Sophiastrand. De studies en praktijkproeven hebben kennis opgeleverd over hoe het suppleren van zand in het intergetijdengebied het beste aan te pakken.…”

Section: Suppletiesunclassified