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

WAQ- Coupling

XING TONG, modified 6 Years ago.

WAQ- Coupling

Youngling Posts: 3 Join Date: 11/7/14 Recent Posts
Dear delft users,

I have come across a problem when coupling the hydrodynamic results, after aggregate the grid per domain.
the screen shot is like this:

No agreement between IAGN and KCS-FLOW

Can anyone help me out of here, thanks.
Arjen Markus, modified 6 Years ago.

RE: WAQ- Coupling

Jedi Knight Posts: 223 Join Date: 1/26/11 Recent Posts
Hi Xing,

the message is a bit cryptic, but the cause is a mismatch between the aggregation file and the hydrodynamic grid. They do not seem to match. Did you change the hydrodynamic model by any chance and didn't update the aggregation information?