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1. Prof. Dr. Jacobus van de Kreeke

Author

Stive, Marcel, Brouwer, Ronald, Elias, Edwin, Hibma, Anneke, Reniers, Ad, Schuttelaars, Henk, Wang, Zheng Binh, Winterwerp, Han, and Zitman, Tjerk

Published
2023

35. Coastal Dynamics

Author

Bosboom, Judith; Delft University of Technology, Civil Engineering and Geosciences, Stive, Marcel J.F.; Delft University of Technology, Civil Engineering and Geosciences, Bosboom, Judith; Delft University of Technology, Civil Engineering and Geosciences, and Stive, Marcel J.F.; Delft University of Technology, Civil Engineering and Geosciences

Abstract

This textbook on Coastal Dynamics focuses on the interrelation between physical wave, flow and sediment transport phenomena and the resulting morphodynamics of a wide variety of coastal systems. The textbook is unique in that it explicitly connects the dynamics of open coasts and tidal basins; not only is the interaction between open coasts and tidal basins of basic importance for the evolution of most coastal systems, but describing the similarities between their physical processes is highly instructive as well. This textbook emphasizes these similarities to the benefit of understanding shared processes such as nonlinearities in flow and sediment transport. Some prior knowledge with respect to the dynamics of flow, waves and sediment transport is recommended. The authors would like to track the reach and use of this Open Textbook. Therefore, they would be very pleased if you could fill out a form to provide information on your intended use of this book. The form also provides options to subscribe for update notifications and give feedback.

Published
2021

44. Sandbars in Motion

Author

Stive, Marcel J. F. and Reniers, Ad J. H. M.

Published
2003

45. Laboratory data on wave propagation through vegetation with following and opposing currents.

Author

Zhan Hu, Simei Lian, Huayu Wei, Yulong Li, Stive, Marcel, and Tomohiro Suzuki

Subjects
THEORY of wave motion, DRAG coefficient, COASTAL wetlands, WIND waves, TIDAL currents, MANGROVE plants
Abstract

Coastal vegetation has been increasingly recognized as effective buffer against wind waves. Recent studies have advanced our understanding of wave dissipation process in vegetation (WDV). In intertidal environments, waves commonly propagate into vegetation fields with underlying tidal currents, which may alter WDV, but such influence is often overlooked. The key mechanism of WDV with co-existing currents are understudied, as previous studies have drawn contradictory conclusions on the effect of following currents on WDV. Subsequent laboratory experiments have partly explained the inconsistent conclusions, but relevant data are rarely available for theoretical or modelling development. Additionally, while the vegetation drag coefficient is a key factor influencing WDV, it is rarely reported for combined wave-current flows. This paper reports a unique dataset from two flume experiments, including 668 wave-only and wave with following/opposing current tests. A variety of data including wave height, drag coefficient, in-canopy velocity and acting force on mimic vegetation stem are recorded. This dataset is expected to assist future theoretical advancement on WDV, which may ultimately lead to more accurate prediction of wave dissipation capacity of real coastal wetlands. The dataset is available from figshare (https://doi.org/10.6084/m9.figshare.13026530.v2; Hu et al., 2020) with clear instructions for reuse. The current dataset will expand with additional WDV data from ongoing as well as planned future observation in real mangrove wetlands. [ABSTRACT FROM AUTHOR]

Published
2021
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46. Modelling of bed sediment composition changes at the lower shoreface of the Sand Motor

Author

Huisman, B.J.A., Ruessink, B.G., De Schipper, Matthieu, Luijendijk, Arjen, Stive, Marcel, Proceskunde, Coastal dynamics, Fluvial systems and Global change, Proceskunde, and Coastal dynamics, Fluvial systems and Global change

Subjects
Environmental Engineering, 010504 meteorology & atmospheric sciences, Lower shoreface, Sorting, Sorting (sediment), Sediment, Ocean Engineering, 010502 geochemistry & geophysics, 01 natural sciences, Substrate (marine biology), Grain size, Bed sediment, Nourishment, Numerical modelling, Common spatial pattern, Geomorphology, Sediment transport, Seabed, Geology, 0105 earth and related environmental sciences
Abstract

Large perturbations in the coastline, such as the 'Sand Motor' nourishment ( ∼ 21 million m3) at the Holland coast, can initiate considerable spatial and temporal changes in the median grain size ( D 50 ) of the sea bed on the lower shoreface. The relevance of hydrodynamic conditions for the development of the heterogeneity in D 50 at large-scale nourishments was assessed with a numerical model (Delft3D), which required a validation against 2.5 years of D 50 measurements. A good representation of the observed spatial pattern of D 50 was obtained independent of a 2DH or 3D approach and initial condition for the D 50 of the bed. Five sediment size fractions and a multi-layer administration of the bed composition were used. The extent and magnitude of the coarsening of the bed is related to the velocity of the horizontal tide, while a far less pronounced coarsening takes place during energetic conditions (i.e. H m 0 ≥ 3 m). Differential suspension behaviour between the size fractions, which are all mobilized at the bed, causes a preferential transport of fine sediment (in alongshore direction) away from the Sand Motor at the lower shoreface (i.e. seaward of MSL -6 m). Storm conditions may induce a partial removal of the coarse top-layer due to mobilization of all of the size fractions and mixing with the relatively fine substrate material. Simulations also show that transport of the fine sand fraction extents to much deeper water than for the medium and coarse sand fractions. Models with multiple sediment fractions are therefore required for the assessment of environmental impacts of large-scale coastal structures or land reclamation's and sediment transport on the lower shoreface.

Published
2018

50. Cross-shore stratified tidal flow seaward of a mega-nourishment

Author

Meirelles, Saulo, Henriquez, Martijn, Reniers, Ad, Luijendijk, Arjen P., Pietrzak, Julie, Horner-Devine, Alexander R., Souza, Alejandro J., Stive, Marcel J.F., Meirelles, Saulo, Henriquez, Martijn, Reniers, Ad, Luijendijk, Arjen P., Pietrzak, Julie, Horner-Devine, Alexander R., Souza, Alejandro J., and Stive, Marcel J.F.

Abstract

The Sand Engine is a 21.5 million m3 experimental mega-nourishment project that was built in 2011 along the Dutch coast. This intervention created a discontinuity in the previous straight sandy coastline, altering the local hydrodynamics in a region that is in influenced by the buoyant plume generated by the Rhine River. This work investigates the response of the cross-shore stratified tidal flow to the coastal protrusion created by the Sand Engine emplacement by using a 13 hour velocity and density survey. Observations document the development of strong baroclinic-induced cross-shore exchange currents dictated by the intrusion of the river plume fronts as well as the classic tidal straining which are found to extend further into the nearshore (from 12 to 6m depth), otherwise believed to be a mixed zone.

Published
2018

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