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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



  • JL
    Joon Lee replied 4 Years ago.

    Couple DELWAQ and TELEMAC - Problem in TH BCs

    9 Posts 3746 Views 1 Answer
  • JL
    Joon Lee replied 4 Years ago.

    Couple TELEMAC and DELWAQ

    7 Posts 2994 Views 2 Answers
  • Javier F Bárcena replied 4 Years ago.

    Dispersion array files (.dsp)

    3 Posts 2190 Views
  • Christophe Thiange replied 4 Years ago.

    Variable solar radiation in a fecal coliform process

    4 Posts 2094 Views
  • Michelle Jeuken replied 4 Years ago.

    Salinity for temporaries uncovered beds

    6 Posts 2854 Views 2 Answers
  • Michelle Jeuken replied 4 Years ago.

    Processes in Sediment Layer

    2 Posts 1948 Views 1 Answer
  • KT
    Kazuhiro Tsubono replied 4 Years ago.

    PART is missing in menu

    3 Posts 1923 Views 1 Answer
  • HR
    Huub Rijper replied 1 Year ago.

    substance file for sediments

    5 Posts 3277 Views
  • Javier García Alba replied 4 Years ago.

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

    3 Posts 1987 Views
  • Michelle Jeuken replied 4 Years ago.

    Substances files

    2 Posts 1780 Views
  • Rudy Schueder replied 4 Years ago.

    Outlet water quality boundary conditions

    3 Posts 2746 Views 1 Answer
  • SZ
    Stephanie Zeunert replied 3 Years ago.

    Rain in DELWAQ

    5 Posts 5243 Views
  • AM
    Arjen Markus replied 4 Years ago.

    Delwaq and FLOW - Constituents not transported through culverts

    3 Posts 3002 Views
  • Rudy Schueder replied 5 Years ago.

    Defining your own processes and parameters

    5 Posts 2968 Views 2 Answers
  • Mathieu Chatelain replied 5 Years ago.

    stopped with error code : 1

    10 Posts 4185 Views
  • FA
    Fernando Aguilar replied 5 Years ago.

    Segment function problem

    5 Posts 2483 Views
  • VY
    veli yumruktepe replied 5 Years ago.

    NEFIS Error Mesage

    5 Posts 5040 Views
  • IH
    Ingrid Holzwarth replied 5 Years ago.

    PPrLim - correction flux algae growth

    3 Posts 1901 Views 1 Answer
  • Rudy Schueder replied 4 Years ago.

    cannot get algal grow at BLOOM

    6 Posts 4395 Views 0 Answers
  • Julio Werner Yoshioka Bernardo replied 5 Years ago.

    How to get temperature from FLOW in WAQ?

    3 Posts 2641 Views 1 Answer
Showing 161 to 180 of 201 entries.