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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



  • AM
    Arjen Markus replied 5 Years ago.

    coupling delwaq with Telemac 2D

    10 Posts 5186 Views
  • Mary Akurut replied 5 Years ago.

    Example .tim file

    3 Posts 2996 Views 1 Answer
  • AM
    Arjen Markus replied 5 Years ago.

    How does DELWAQ deal with sediment concentrations in cells that wet & dry?

    2 Posts 2254 Views 1 Answer
  • MV
    Martin Verlaan replied 5 Years ago.

    d3d_04_15_wind_calibration error

    5 Posts 2535 Views 1 Answer
  • Mary Akurut replied 5 Years ago.

    Error in Waq (2)

    12 Posts 5203 Views
  • Mary Akurut replied 5 Years ago.

    ERROR ! Time value 90000 not larger than previous time value 9000

    3 Posts 2181 Views 1 Answer
  • Leo Postma replied 5 Years ago.

    transects definition

    2 Posts 2114 Views 1 Answer
  • Jan van Beek replied 5 Years ago.

    CONSBL: grazing fluxes are recorded all NaN

    2 Posts 2121 Views 1 Answer
  • Christophe Thiange replied 5 Years ago.

    Z-layers model, problem with boundary conditions in Delwaq

    2 Posts 2456 Views 1 Answer
  • AK
    Ashok Khadka replied 5 Years ago.

    Delft-WAQ in parallel version

    3 Posts 5295 Views
  • Christophe Thiange replied 5 Years ago.

    Help with CONSBL process

    4 Posts 2874 Views 1 Answer
  • JL
    João Lencart e Silva replied 5 Years ago.

    Running DELWAQ with OpenMP

    3 Posts 3120 Views 1 Answer
  • Christophe Thiange replied 5 Years ago.

    WAQ: Coupling with FLOW in LINUX

    4 Posts 3265 Views 1 Answer
  • JL
    João Lencart e Silva replied 5 Years ago.


    2 Posts 2191 Views
  • SJ
    Song JingWei replied 5 Years ago.

    How to define initial conditions of BLUE GREENS

    5 Posts 2919 Views 1 Answer
  • Michelle Jeuken replied 1 Year ago.

    Flow & Wave run COM file coupling error

    5 Posts 4011 Views 1 Answer
  • AM
    Ana Mend replied 5 Years ago.

    TELEMAC-Delft3D - Coupling

    7 Posts 6555 Views 1 Answer
  • Ben Williams replied 5 Years ago.

    Reading coupling files

    3 Posts 2770 Views
  • Javier F Bárcena replied 5 Years ago.

    Water quality modelling from MPI simulation and multiple COM files

    9 Posts 6909 Views
  • Christophe Thiange, modified 5 Years ago.

    Delwaq publications

    1 Post 1631 Views
Showing 181 to 200 of 201 entries.