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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


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Wavecon file for FLOW-WAVE online coupling

Gabriel Lim, modified 8 Days ago.

Wavecon file for FLOW-WAVE online coupling

Padawan Posts: 32 Join Date: 5/5/18 Recent Posts
I want to include representative values for waves and wind for an online coupled FLOW-WAVE simulation. I am using the wavecon file to specify the my representative time series of wave forcing. My question is regarding whether or not I need to include the representative wind values and also the water level in the wavecon file as well as in the FLOW GUI??
I have already input all the wind time series into the "physical parameters" tab of the FLOW GUI, and specified in the Grids->Hydrodynamics tab: "Use and Extend" for the water level and "Use but do not extend" for the wind data. My problem is however in the WAVE user manual, it says in Appendix A.2.8.1:

"To use this Wavecon option, just simply add the <wavecon.rid> file to the working directory and the system will use the file automatically. A WAVE computation is always performed on a certain time point (based on the reference date). If a <wavecon.rid> file exists in the working directory, it will get its wave boundary
conditions (including wind and water level) from that file
. The boundary condition values in the default <rid.mdw> file will not be used then. When the time point of the wave computation lies between two prescribed time points in the <wavecon.rid> file, it will interpolate the wave, wind and water level conditions between these two time points."

So I am unsure if I need to include the water level and wind data in the WAVE GUI wavecon file again, or if it is sufficient to leave it in the FLOW GUI and simply set these parameters as zero in the wavecon file. Any help would be much appreciated! Thank you!

Kind regards,