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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



  • Christophe Thiange replied 3 Years ago.

    inconsistency in DIMENSIONAL ANALYSIS

    2 Posts 2348 Views
  • FK
    Frank Kleissen replied 3 Years ago.

    Disk write frequency in delft-part

    2 Posts 1662 Views 1 Answer
  • Michelle Jeuken replied 3 Years ago.

    Vegetation decomposition

    5 Posts 4425 Views 0 Answers
  • FK
    Frank Kleissen replied 3 Years ago.

    Delft3D PART(oil) issue with sticking (beaching)

    2 Posts 2915 Views 1 Answer
  • GA
    Gabriela Alvarez replied 3 Years ago.

    Algae phenotypes concentration

    8 Posts 4952 Views
  • Christophe Thiange replied 3 Years ago.

    Modeling nutrient processes at sediment-water interface

    2 Posts 3010 Views 1 Answer
  • NN
    Nill Ng replied 3 Years ago.

    Time and Depth Varying Boundary Condition and others...

    25 Posts 14880 Views 7 Answers
  • GG
    gustavo gomes replied 3 Years ago.

    D-WAQ PART - Changing the number of threads

    3 Posts 2396 Views 1 Answer
  • DK
    Danker Kolijn replied 3 Years ago.

    Implementing bottom growth / algae cover

    3 Posts 3615 Views
  • Christophe Thiange replied 3 Years ago.

    Coastal model Dissolved Oxygen (DO) boundary & computational issue

    2 Posts 2521 Views
  • Rudy Schueder replied 3 Years ago.

    NaN in RHS segment after editing pripro.f in waq kernel

    3 Posts 2605 Views 1 Answer
  • FF
    Fabricio Fiengo, modified 3 Years ago.

    S1 and S2 outputs

    1 Post 1523 Views 0 Answers
  • FF
    Fabricio Fiengo replied 3 Years ago.

    Problems with slow adsorption-desorption outputs in S1

    5 Posts 2942 Views 1 Answer
  • AM
    Arjen Markus replied 3 Years ago.

    How to view parameter (*.par) file?

    4 Posts 3970 Views
  • AM
    Arjen Markus replied 3 Years ago.

    plct crashes during edition

    4 Posts 2328 Views 0 Answers
  • AM
    Arjen Markus replied 3 Years ago.

    Coupling problems using Z-Layers

    22 Posts 12944 Views 2 Answers
  • WS
    Willem Stolte, modified 3 Years ago.

    R tools for postprocessing?

    1 Post 1669 Views
  • Christophe Thiange replied 3 Years ago.

    error in output of some substances

    2 Posts 2190 Views
  • LH
    Li Haijun replied 3 Years ago.

    MPI - Running parallel on windows

    5 Posts 3142 Views 1 Answer
  • NJ
    Nick Jewitt replied 3 Years ago.

    WAQ Coupling

    5 Posts 2883 Views 2 Answers
Showing 101 to 120 of 190 entries.