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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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Questions about ERROR NEFIS message 8016

ShengZhuo Xu, modified 1 Year ago.

Questions about ERROR NEFIS message 8016

Youngling Posts: 1 Join Date: 6/23/18 Recent Posts

I was running a flow model with two domains. The followings are the error message in the diagnose file:


 Creating new trih-Wad.dat
 Creating new trih-Wad.def
 Creating new trim-Wad.dat
 Creating new trim-Wad.def
*** ERROR 
NEFIS message 8016: File 'trim-Wad.def' is not a NEFIS definition file 
*** ERROR Flow exited abnormally 


The model was carried out on the version 4.03.01. 


Does anyone know the reason for this problem and the corresponding solutions? Thanks a lot!