Initial morphodynamic changes in the Voordelta in response to the Delta21 interventions

In recent years, the awareness of climate change and sea level rise has grown. Especially in low lying countries like the Netherlands, with a large river delta with a high economical and natural value, extreme variations in water levels will have great impact. Former used solutions proofed to be expensive and in some cases disturbed the dynamics...

Salt marsh modelling: implemented on a GPU

In this thesis, a coupled hydrodynamic, morphodynamic and plant growth model is reviewed. The goal of this model is to simulate plant colonization and channel formation on an initially flat or ascending substrate in a tidal landscape. To be able to simulate these biophysical processes on a small enough scale (while still using the same spatial...

Morphodynamic equilibria for a width varying tidal embayment

In this thesis a morphodynamic model of a tidal embayment, first studied in Schuttelaars & de Swart (1996), will be described and investigated. The difference with the rectangular embayment in Schuttelaars & de Swart (1996) is that the width is described with an exponential function. We focus here on the width averaged solutions. This gives us a...

The bedload layer in a 1D sand-gravel morphodynamic model

The effective thickness of the bedload layer over a river bed can be schematised as the total volume of bedload sediment that is in transport, divided by the surface. In practice, this layer is considered to have a constant thickness over time. Main question of this thesis is whether this assumption is valid. By analyzing the mass balance, it is...

Development of a generic automated instrument for the calibration of morphodynamic Delft3D model applications

The numerical flow model Delft3D simulates the flow of water and movement of submerged sediment by means of solving simplified equations that describe these processes. Because of these simplifications, parameterizations are introduced. These parameters represent amongst others the processes that take place on scales smaller than the spacing of...

Simulating and classifying large-scale spatial sand-mud segregation using a process-based model for a tidal inlet system

Tidal inlet systems, as found in the Dutch Wadden Sea, often feature both sand and mud. Due to differences in sediment properties, sand and mud particles respond different to identical forcing conditions, like short waves and tidal currents. Because of this, sand and mud can get transported to different locations. This process is referred to by...