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:

  1. Create a model domain by clicking on 'Draw Outline' with a certain spacing (i.e. grid size)
  2. Define a polygon where you would like to model a nourishment
  3. Define how much sand you would like to deposit (i.e. certain volume, thickness, etc.) 
  4. 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



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