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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



  • Maria Gracioto replied 18 Days ago.

    Error not finding delpar.exe - D-PART

    7 Posts 338 Views 0 Answers
  • 22
    21712235 21712235 21712235 replied 2 Months ago.

    Interaction D-Waq and D-Part

    3 Posts 1390 Views 0 Answers
  • ZW
    Zhanxian Wang replied 11 Months ago.

    suspended sediment and salinity from FLOW to WAQ?

    4 Posts 2071 Views 1 Answer
  • ST
    Serene Tay, modified 1 Year ago.

    Spatial wind input in d-particle track

    1 Post 1196 Views 0 Answers
  • xia wei replied 10 Months ago.

    Vegetation Decomposition Parameters

    4 Posts 3516 Views 1 Answer
  • VY
    veli yumruktepe replied 4 Years ago.

    Substance files

    15 Posts 15775 Views
  • AM
    Arjen Markus replied 5 Hours ago.

    Increase WAQ simulation period than Flow?

    2 Posts 11 Views
  • RK
    Ravi Kumar replied 13 Days ago.

    How to incorporate a new processes into the library?

    31 Posts 2630 Views
  • AM
    Arjen Markus replied 17 Days ago.

    Delwaq-Scale factor and units in Delwaq

    2 Posts 110 Views
  • AM
    Arjen Markus replied 19 Days ago.

    Modelling the oxygen production with photosynthesis

    2 Posts 313 Views
Showing 1 to 10 of 201 entries.