Roughness module for sediment dynamic modelling


The bed roughness tool, a mathematical model, can be a useful instrument for hydraulic engineers to quickly set up a bathymetry with a variable roughness of the surface. Sediment dynamics in the intertidal area are the result of the complex interaction between hydrodynamics and biological activity. Bed roughness is one of the most important and difficult parameters to quantify in order to model the hydrodynamics and sediment dynamics. Bed roughness can be generated by physical characteristics (ripples, sediment grain size) and by benthic organisms that modify the surface. The roughness tool can be used to reproduce the hydrodynamics based on both physical and biological processes.

Type: Model
Project Phase: Planning & Design
Type of assessment: Impact Assesment
Purpose: Assessing effects of different biological structures on hydrodynamics and morphology, creating roughness height map for input into hydrodynamic model
Requirements: Knowledge on hydrodynamic modelling
Relevant Software: Matlab, Delft3D

Example of different roughness height within grid