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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



  • SZ
    Stephanie Zeunert replied 3 Years ago.

    Rain in DELWAQ

    5 Posts 5093 Views
  • AM
    Arjen Markus replied 4 Years ago.

    Delwaq and FLOW - Constituents not transported through culverts

    3 Posts 2951 Views
  • Rudy Schueder replied 4 Years ago.

    Defining your own processes and parameters

    5 Posts 2930 Views 2 Answers
  • Mathieu Chatelain replied 4 Years ago.

    stopped with error code : 1

    10 Posts 4084 Views
  • FA
    Fernando Aguilar replied 4 Years ago.

    Segment function problem

    5 Posts 2411 Views
  • VY
    veli yumruktepe replied 4 Years ago.

    NEFIS Error Mesage

    5 Posts 4935 Views
  • IH
    Ingrid Holzwarth replied 4 Years ago.

    PPrLim - correction flux algae growth

    3 Posts 1856 Views 1 Answer
  • Rudy Schueder replied 3 Years ago.

    cannot get algal grow at BLOOM

    6 Posts 4302 Views 0 Answers
  • Julio Werner Yoshioka Bernardo replied 5 Years ago.

    How to get temperature from FLOW in WAQ?

    3 Posts 2577 Views 1 Answer
  • AM
    Arjen Markus replied 4 Years ago.

    coupling delwaq with Telemac 2D

    10 Posts 5048 Views
  • Mary Akurut replied 5 Years ago.

    Example .tim file

    3 Posts 2951 Views 1 Answer
  • AM
    Arjen Markus replied 5 Years ago.

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

    2 Posts 2221 Views 1 Answer
  • MV
    Martin Verlaan replied 5 Years ago.

    d3d_04_15_wind_calibration error

    5 Posts 2488 Views 1 Answer
  • Mary Akurut replied 5 Years ago.

    Error in Waq (2)

    12 Posts 5099 Views
  • Mary Akurut replied 5 Years ago.

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

    3 Posts 2151 Views 1 Answer
  • Leo Postma replied 5 Years ago.

    transects definition

    2 Posts 2089 Views 1 Answer
  • Jan van Beek replied 5 Years ago.

    CONSBL: grazing fluxes are recorded all NaN

    2 Posts 2102 Views 1 Answer
  • Christophe Thiange replied 5 Years ago.

    Z-layers model, problem with boundary conditions in Delwaq

    2 Posts 2401 Views 1 Answer
  • AK
    Ashok Khadka replied 5 Years ago.

    Delft-WAQ in parallel version

    3 Posts 5211 Views
  • Christophe Thiange replied 5 Years ago.

    Help with CONSBL process

    4 Posts 2845 Views 1 Answer
Showing 161 to 180 of 190 entries.