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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


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  • VP
    Vinicius Santos Pessanha replied 1 Hour ago.

    Window 10 - forrtl: severe (172): Program Exception - exception code = 0x73

    5 Posts 490 Views
  • GS
    Gholamreza Shiravani replied 4 Hours ago.

    Why does coupling ignore sediment files to couple?

    8 Posts 108 Views
  • GF
    Giles Fearon replied 6 Hours ago.

    Spatial wind input in d-particle track

    2 Posts 1479 Views 0 Answers
  • Amr Salama, modified 8 Hours ago.

    DELWAQ (Sediment Water Interface) Problem

    1 Post 16 Views
  • AR
    Alberto Rodriguez, modified 8 Hours ago.

    Delft3D-WAVE crashing when writing 999 2D Spectra results

    1 Post 15 Views
  • YZ
    Yongbo Zhou replied 9 Hours ago.

    Error in running delwaq2

    11 Posts 597 Views 0 Answers
  • JM
    jaya mouni replied 9 Hours ago.

    What is DevOps? & DevOps Tools

    2 Posts 82 Views
  • KK
    Kumar Gowda Kapoor replied 10 Hours ago.

    Storm Surge Model

    47 Posts 12684 Views 1 Answer
  • CR
    Christo Rautenbach replied 14 Hours ago.

    Initial conditions for WAVE?

    4 Posts 1008 Views 0 Answers
  • AR
    Alberto Rodriguez replied 1 Day ago.

    Is D3D-WAVE time frame limited??

    4 Posts 860 Views 0 Answers
  • JM
    jaya mouni replied 1 Day ago.


    8 Posts 1364 Views
  • Phil Shepperd replied 1 Day ago.

    error in double array allocation of vicuv

    6 Posts 86 Views
  • JM
    jaya mouni replied 2 Days ago.


    5 Posts 530 Views
  • LP
    Lucas Pion, modified 5 Days ago.

    Difficulties with .bcm file

    1 Post 19 Views 0 Answers
  • AM
    Alexander Miller replied 5 Days ago.

    Running flow-3d from GUI -- Linking open source code and GUI

    3 Posts 63 Views
  • SL
    Sung Tae LEE replied 6 Days ago.

    Delwaq + QuickPlot + lga (grid file)

    6 Posts 147 Views
  • SK
    Sven K, modified 6 Days ago.

    Output File Water Level Storm Surge

    1 Post 34 Views
Showing 1 to 17 of 17 entries.