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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



  • Fatemeh GholamiMahyari replied 2 Years ago.

    Error in startup: delwaq1.exe

    7 Posts 5557 Views 1 Answer
  • AM
    Arjen Markus replied 4 Years ago.

    Restart from a map file, howto

    6 Posts 4203 Views
  • SN
    Sathya narayanan replied 4 Years ago.

    Abnormally high values of Oxygen and NO3 in simulation coupled with Telemac

    3 Posts 2259 Views 1 Answer
  • Michelle Jeuken replied 4 Years ago.

    General Coliform Model references

    12 Posts 4753 Views
  • AM
    Arjen Markus replied 1 Year ago.

    GMRES Error

    7 Posts 4492 Views 1 Answer
  • DP
    David Plew replied 4 Years ago.

    OpenPLCT processes - why are my fluxes depth dependent?

    7 Posts 3174 Views 1 Answer
  • AM
    Arjen Markus replied 4 Years ago.

    Couple TELEMAC-DWAQ : How to Implement Weirs

    18 Posts 5515 Views 3 Answers
  • Michelle Jeuken replied 4 Years ago.

    coupling DELWAQ to UnTRIM

    4 Posts 2308 Views 2 Answers
  • Michelle Jeuken replied 4 Years ago.

    Light extinction due to DOC

    3 Posts 2484 Views
  • JL
    Joon Lee replied 4 Years ago.

    Couple DELWAQ and TELEMAC - Problem in TH BCs

    9 Posts 3689 Views 1 Answer
  • JL
    Joon Lee replied 4 Years ago.

    Couple TELEMAC and DELWAQ

    7 Posts 2909 Views 2 Answers
  • Javier F Bárcena replied 4 Years ago.

    Dispersion array files (.dsp)

    3 Posts 2148 Views
  • Christophe Thiange replied 4 Years ago.

    Variable solar radiation in a fecal coliform process

    4 Posts 2052 Views
  • Michelle Jeuken replied 4 Years ago.

    Salinity for temporaries uncovered beds

    6 Posts 2791 Views 2 Answers
  • Michelle Jeuken replied 4 Years ago.

    Processes in Sediment Layer

    2 Posts 1915 Views 1 Answer
  • KT
    Kazuhiro Tsubono replied 4 Years ago.

    PART is missing in menu

    3 Posts 1885 Views 1 Answer
  • HR
    Huub Rijper replied 1 Year ago.

    substance file for sediments

    5 Posts 3172 Views
  • Javier García Alba replied 4 Years ago.

    How to specify a concentration in a cell without complete mixing?

    3 Posts 1940 Views
  • Michelle Jeuken replied 4 Years ago.

    Substances files

    2 Posts 1749 Views
  • Rudy Schueder replied 4 Years ago.

    Outlet water quality boundary conditions

    3 Posts 2704 Views 1 Answer
Showing 141 to 160 of 190 entries.