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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



  • NN
    Nill Ng replied 3 Years ago.

    Time and Depth Varying Boundary Condition and others...

    25 Posts 15188 Views 7 Answers
  • GG
    gustavo gomes replied 3 Years ago.

    D-WAQ PART - Changing the number of threads

    3 Posts 2439 Views 1 Answer
  • DK
    Danker Kolijn replied 3 Years ago.

    Implementing bottom growth / algae cover

    3 Posts 3706 Views
  • Christophe Thiange replied 3 Years ago.

    Coastal model Dissolved Oxygen (DO) boundary & computational issue

    2 Posts 2598 Views
  • Rudy Schueder replied 3 Years ago.

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

    3 Posts 2667 Views 1 Answer
  • FF
    Fabricio Fiengo, modified 3 Years ago.

    S1 and S2 outputs

    1 Post 1557 Views 0 Answers
  • FF
    Fabricio Fiengo replied 3 Years ago.

    Problems with slow adsorption-desorption outputs in S1

    5 Posts 3002 Views 1 Answer
  • AM
    Arjen Markus replied 3 Years ago.

    How to view parameter (*.par) file?

    4 Posts 4043 Views
  • AM
    Arjen Markus replied 3 Years ago.

    plct crashes during edition

    4 Posts 2382 Views 0 Answers
  • AM
    Arjen Markus replied 3 Years ago.

    Coupling problems using Z-Layers

    22 Posts 13144 Views 2 Answers
  • WS
    Willem Stolte, modified 3 Years ago.

    R tools for postprocessing?

    1 Post 1709 Views
  • Christophe Thiange replied 3 Years ago.

    error in output of some substances

    2 Posts 2219 Views
  • LH
    Li Haijun replied 3 Years ago.

    MPI - Running parallel on windows

    5 Posts 3227 Views 1 Answer
  • NJ
    Nick Jewitt replied 3 Years ago.

    WAQ Coupling

    5 Posts 2937 Views 2 Answers
  • SZ
    Stephanie Zeunert replied 3 Years ago.

    Settling of algae on the sediment

    5 Posts 2546 Views 1 Answer
  • VY
    veli yumruktepe, modified 3 Years ago.

    Grazing of Phyto

    1 Post 1675 Views
  • Christophe Thiange replied 3 Years ago.

    "Wash-out" of initial conditions for certain constituents

    9 Posts 3948 Views 1 Answer
  • VY
    veli yumruktepe replied 3 Years ago.

    ECO run problem

    5 Posts 2578 Views
  • Javier García Alba replied 3 Years ago.

    How to create the pointer***.asc file

    9 Posts 3982 Views
  • AR
    Alonso Rodríguez Benítez replied 3 Years ago.

    Delft3D-WAQ. Different dispersion for each cell

    8 Posts 4050 Views 1 Answer
Showing 121 to 140 of 202 entries.