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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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Compilation problems because libexpat.dll is missing

Alexander Montalvo, modified 1 Year ago.

Compilation problems because libexpat.dll is missing

Youngling Posts: 1 Join Date: 9/5/16 Recent Posts

Hi everyone, 



Recently I tried to compile the source code of the 6906 version in windows 10 with VS 2010 and IF14, however, I get the following error message when I want to run the example file "run_flow2d3d.bat". The message the file "problemdelft3d.png"


I attached  VS output after compiling with Release x64 and the output when I tried with debug x64. 


in both forms it still presents the same problem with the .dll file. 

Other problem appeared during compilation there is also a flex.exe error message

Thank you.