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

SWAN Error

Lucas Pion, modified 3 Years ago.

SWAN Error

Youngling Posts: 12 Join Date: 5/7/13 Recent Posts

I am founding an error performing SWAN simulations and I was not able to solve it.
I have already created new versions of input files, changed folders, changed delft version for an older one that I have here and nothing worked.
The image attached shows more details of the error.

Has anyone seen something like that? Or knows what else it could be?

Thank you very much!
Adri Mourits, modified 2 Years ago.

RE: SWAN Error

Yoda Posts: 1212 Join Date: 1/3/11 Recent Posts

Hi Lucas,

Looking in the source code: it goes wrong when trying to create file "<runid>.swn", were <runid> is the base name of your mdw-file (e.g. if your mdw-file is named "test.mdw", then <runid> is "test"). Can you try to remove that swn-file from the working directory manually? Alternatively: what happens when you start with an empty working directory and copy all the input files in there, excluding the swn-file?