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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

Beginner Error! Problem with the results.... Need help ASAP

Francoise Hanz Detriech Maano Almarza, modified 3 Months ago.

Beginner Error! Problem with the results.... Need help ASAP

Youngling Posts: 6 Join Date: 2/17/19 Recent Posts

Hi all,


I am just new in delft3d and I need your help. I already have a working program however I encounter some warnings. When I use the QUICKPLOT, it seems that the water level starts at a higher level compared to the initial condition that I used. The boundary conditions looked good. Is it a problem in the bathymetry? Or is it a problem in the initial conditions?

Any help is greatly appreciated. Attached are all the files I used for the program.