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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



  • Michelle Jeuken replied 2 Months ago.

    Interaction D-Waq and D-Part

    2 Posts 396 Views 0 Answers
  • ZW
    Zhanxian Wang replied 6 Months ago.

    suspended sediment and salinity from FLOW to WAQ?

    4 Posts 970 Views 1 Answer
  • ST
    Serene Tay, modified 8 Months ago.

    Spatial wind input in d-particle track

    1 Post 695 Views 0 Answers
  • xia wei replied 5 Months ago.

    Vegetation Decomposition Parameters

    4 Posts 2640 Views 1 Answer
  • VY
    veli yumruktepe replied 4 Years ago.

    Substance files

    15 Posts 14070 Views
  • AM
    Arjen Markus replied 7 Days ago.

    child killed: unknown signal

    2 Posts 35 Views
  • SX
    ShengZhuo Xu, modified 1 Month ago.

    Questions about ERROR NEFIS message 8016

    1 Post 91 Views 0 Answers
  • MD
    meddy danial replied 1 Month ago.

    Boundary conditions

    5 Posts 3238 Views
  • AM
    Arjen Markus replied 2 Months ago.

    Is still Delwaq for one node or already developed for cluster using MPI?

    2 Posts 149 Views
  • Michelle Jeuken replied 2 Months ago.

    Delft Flow-WAQ coupling error

    4 Posts 1404 Views 0 Answers
  • AA
    Amelia Araujo, modified 3 Months ago.

    RadSurf file in BLOOM

    1 Post 483 Views
  • AA
    Amelia Araujo replied 3 Months ago.

    DELWAQ Conversion NEFIS to NetCDF

    15 Posts 6375 Views 1 Answer
  • AA
    Amelia Araujo replied 3 Months ago.

    delwaq1 error reading block 5

    41 Posts 4040 Views 1 Answer Locked
  • AM
    Arjen Markus replied 6 Months ago.

    Spatially Varying Reactions

    2 Posts 615 Views 1 Answer
  • AM
    Arjen Markus replied 6 Months ago.

    DELWAQ coupled with z-layer Delft3D FLOW model?

    8 Posts 1322 Views 1 Answer
  • AM
    Arjen Markus replied 6 Months ago.

    confusing paragraph on Page 59 of the D-Water Quality User Manual

    3 Posts 635 Views
  • Michelle Jeuken replied 6 Months ago.

    How to do water balance check and how to calculate thermal water fraction

    10 Posts 1548 Views 2 Answers
  • Michelle Jeuken replied 6 Months ago.

    run DELWAQ on a cluster?

    7 Posts 1267 Views 1 Answer
  • Fatemeh GholamiMahyari replied 7 Months ago.

    Need help for applying D-Water Quality on 0D

    3 Posts 1047 Views 0 Answers
  • Santiago Montes replied 7 Months ago.

    Error with statistical output function STAPRC

    3 Posts 937 Views
Showing 1 to 20 of 181 entries.