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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


Message Boards

FLOW-WAVE coupling problem

Hafizur Rahman, modified 2 Years ago.

FLOW-WAVE coupling problem

Youngling Posts: 5 Join Date: 4/4/17 Recent Posts

I am trying to set up a trial model for my project using FLOW-WAVE coupling.i had followed the steps provided in the WAVE manuals.While running the simulation some meassage appeared and the simulation seems to hang at initial state for about 3 hours.. i have attached two pictures of the message and the place where simulation hanged.

here are some lines from flow dianosis file

*** WARNING Latitude of your model is 0 degrees, model located at equator
*** WARNING MAP stop time outside simulation period; will be reset
*** WARNING HIS stop time outside simulation period; will be reset
*** WARNING Comm. stop time outside period for writing file; will be reset
Creating new trih-stMartin-1.dat
Creating new trih-stMartin-1.def
Creating new trim-stMartin-1.dat
Creating new trim-stMartin-1.def
*** MESSAGE Nodal factors updated at 2016-03-02 **:**:**.0000
NEFIS message 6004:
Group 'WAVNT ' does not exist in data file
Adri Mourits, modified 2 Years ago.

RE: FLOW-WAVE coupling problem (Answer)

Yoda Posts: 1224 Join Date: 1/3/11 Recent Posts
Hi Hafizur,

Please have a look at the FAQ.