Sediment bypassing at Ameland inlet: And the role of an ebb-tidal delta nourishment

A large part of the Dutch coast, the barrier islands in the Wadden Sea included, would be eroding if the deficit in the total sediment budget was not compensated for through nourishments. Ebb-tidal deltas have an important function within the coastal system that make them of interest for coastal defence as a source and transport path for sand to...

Stability of intertidal and subtidal areas after Delta21 plan: Evaluating the consequences for the morphological development produced by the interventaion

In recent years, there has been an increasing need for solutions against the threats that SLR and climate change represent for coastal systems, especially in low lying areas like the SW Dutch coast. Simultaneously, awareness of the impacts that human activities have on natural environments has surged. Integrated and sustainable solutions are...

Morphological development of the Bollen van de Ooster: A potential hazard for Goeree-Overflakkee?

The Bollen van de Ooster, in this report referred to as the Ooster, is a sand bar in the outer delta of the Grevelingen. The Ooster is separated from the coast by a relatively deep channel, called the Schaar. Closure of the Grevelingen in 1971, with the construction of the Brouwersdam, initiated vast changes in morphology. Damming of the estuary...

Understanding coastal dynamics at an ebb-tidal delta in the Wadden Sea: A case study of Schiermonnikoog NW with Delft3D Flexible Mesh

Schiermonnikoog is a Dutch barrier island with wide beaches and dunes which are both of importance for recreation as for safety. However, after decades of coastal accretion, in the last years, a strong coastline retreat is observed at the island head in the northwest. In tidal inlets, various forcing conditions of tides, waves, winds and...

Sediment transport during the execution of the pilot nourishment Ameland Inlet: Development of a tool for analysing bathymetric surveys, applied on the pilot nourishment Ameland inlet

Within the KustGenese 2.0 research project a 5Mm3 pilot nourishment is created on the ebb-tidal delta of Ameland. For this thesis I was involved in the parties; Van den Herik, the contractor who executed the work, Deltares and Rijkswaterstaat. A tool is created to quickly analyse new surveys in combination with the ships deposit data. The tool...

The effects of currents on wave nonlinearities

This study investigates nonlinear wave shape and the near-bed velocity influenced in the vicinity of a tidal inlet for the SEdiment supply At the WAdden Sea ebb-tidal Delta project. Wave nonlinearities occur when waves encounter a flow. An opposing flow leads to waves with higher peaks and reduced wave length. During a following flow, the waves...

Hydraulic and morphological impact of a closure dam in the Gulf of Khambhat

Tidal basins are highly dynamic environments with a complex behavior that is often disturbed by human activities. Considering that tidal dynamics have a direct impact on surrounding engineering infrastructures, adjacent coastlines, nature environment and socio-economic human activities, it is crucial to know the impact of human interventions on...

Morphodynamics of the Haringvliet ebb-tidal delta: Unravelling the mechanisms behind its morphological evolution

<b>KEY POINTS:</b><br/>• While the formation of the intertidal shoal Hinderplaat was a direct consequence of a human intervention, its degradation was a natural response of the system to frequent hydrodynamic forcing conditions.<br/><br/>• Tidal currents push the Hinderplaat in offshore direction, but this is counteracted by waves: these...

Investigating spectral wave properties and their effects on bottom evolution induced by waves and current

In many coastal seas, wind-generated waves produce a strong bottom orbital velocity which stirs up sand from the bottom. This process strongly influence sediment transport and bottom evolution. State-of-the-art morphodynamic models traditionally represent the stirring of sand by irregular waves in a highly parametric way. For instance, the...

The influence of dredging activities on the morphological development of the Columbia River mouth

This is a numerical modelling study on the impact of dredging and disposal activities on the long-term morphological development of the Columbia River mouth (MCR). Dredging activities removed 120 Mm3 of sand from the MCR during the studied interval between 1958 and 1999. Only one-third of this volume was disposed in the active littoral zone....

Process-based modelling of tidal inlet dynamics - Evaluation of Frisian Inlet data

The Netherlands Centre for Coastal Research (NCK) is in the process of preparing a comprehensive, coherent research programme focusing on the dynamics of tidal inlet systems with emphasis on the multi-scale dynamic behaviour of the ebb-tidal delta. Ahead of that research programme, this definition study was initiated with the objective to assess...