intro story DELWAQ


DELWAQ is the engine of the D-Water Quality and D-Ecology programmes of the Delft3D suite. It is based on a rich library from which relevant substances and processes can be selected to quickly put water and sediment quality models together.

The processes library covers many aspects of water quality and ecology, from basic tracers, dissolved oxygen, nutrients, organic matter, inorganic suspended matter, heavy metals, bacteria and organic micro-pollutants, to complex algae and macrophyte dynamics. High performance solvers enable the simulation of long periods, often required to capture the full cycles of the processes being modelled.

The finite volume approach underlying DELWAQ allows it to be coupled to both the structured grid hydrodynamics of the current Delft3D-FLOW engine and the upcoming D-Flow Flexible Mesh engine (1D-2D-3D) of the Delft3D Flexible Mesh Suite (or even other models such as TELEMAC).

'DELWAQ in open source' is our invitation to all leading experts to collaborate in further development and research in the field of water quality, ecology and morphology using Delft3D. Feel free to post your DELWAQ related questions or comments in this dedicated forum space. If you are new to DELWAQ, the tutorial (in the user manual) is a good place to start. A list of DELWAQ related publications is available here.




Sub groups
D-Flow Flexible Mesh

Cohesive sediments & muddy systems


Message Boards

Different reference levels in Delft3d Flow (for water level simulation)

Esther Espinoza, modified 3 Years ago.

Different reference levels in Delft3d Flow (for water level simulation)

Padawan Posts: 25 Join Date: 4/6/17 Recent Posts
Hi I'm modelling water level for an estuary. The reference level of the bathymetry data I got was with respect to the MLWS (Mean Low Water Spring) because the data is taken for navigation purposes. The reference level of the amplitudes (time series) of tides, was with respect to the MWL (Mean Water Level). I modelled an example to see what happens, I got no error. But I'm still wondering if the error about modelling water level (MWL) with bathymetry respect to the MLWS generates significant changes in the results and how Delft3d works with reference levels. Do you know how this difference will influence the results or how can I correct this before or after the simulation? The area I'm modelling is kind of big.