Introduction
Nourishments are an adaptation technology that is primarily used in response to shoreline erosion and flood reduction. It is a soft engineering approach to coastal protection which involves supplementing sediment to an area that has a sediment deficit. Normally the effect of a nourishment needs to be modeled with a numerical model including sediment transport and morphology, however, in Delft Dashboard it is also possible to analyse the effects of a nourishment with the Nourishment toolbox.
Usage of the toolbox
Modeling of a nourishment with Delft Dashboard can be done in 4 steps:
- Create a model domain by clicking on 'Draw Outline' with a certain spacing (i.e. grid size)
- Define a polygon where you would like to model a nourishment
- Define how much sand you would like to deposit (i.e. certain volume, thickness, etc.)
- Click on 'Compute' to calculate the effect.
The effect is strongly related to the currents you apply. It is possible to apply the same current in U and V in the entire domain or to apply a spatially varying current.
Figure: example of a model domain and nourishment polygon
Figure: results for sedimentation and erosion, nourishment, bed level and equilibrium sediment concentration
