Migration status

Although the new site is live, work is still in progress to improve it.

Known issues:

  1. Home Page: Events cannot be expanded.


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 19 Days ago.

    Interaction D-Waq and D-Part

    2 Posts 191 Views 0 Answers
  • ZW
    Zhanxian Wang replied 4 Months ago.

    suspended sediment and salinity from FLOW to WAQ?

    4 Posts 652 Views 1 Answer
  • ST
    Serene Tay, modified 6 Months ago.

    Spatial wind input in d-particle track

    1 Post 550 Views 0 Answers
  • xia wei replied 3 Months ago.

    Vegetation Decomposition Parameters

    4 Posts 2341 Views 1 Answer
  • VY
    veli yumruktepe replied 3 Years ago.

    Substance files

    15 Posts 13284 Views
  • Michelle Jeuken replied 19 Days ago.

    Delft Flow-WAQ coupling error

    4 Posts 1070 Views 0 Answers
  • AA
    Amelia Araujo, modified 1 Month ago.

    RadSurf file in BLOOM

    1 Post 271 Views
  • AA
    Amelia Araujo replied 1 Month ago.

    DELWAQ Conversion NEFIS to NetCDF

    15 Posts 5743 Views 1 Answer
  • AA
    Amelia Araujo replied 1 Month ago.

    delwaq1 error reading block 5

    41 Posts 2574 Views 1 Answer Locked
  • AM
    Arjen Markus replied 4 Months ago.

    Spatially Varying Reactions

    2 Posts 409 Views 1 Answer
  • AM
    Arjen Markus replied 3 Months ago.

    DELWAQ coupled with z-layer Delft3D FLOW model?

    8 Posts 746 Views 1 Answer
  • AM
    Arjen Markus replied 4 Months ago.

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

    3 Posts 366 Views
  • Michelle Jeuken replied 3 Months ago.

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

    10 Posts 869 Views 2 Answers
  • Michelle Jeuken replied 4 Months ago.

    run DELWAQ on a cluster?

    7 Posts 759 Views 1 Answer
  • Fatemeh GholamiMahyari replied 5 Months ago.

    Need help for applying D-Water Quality on 0D

    3 Posts 803 Views 0 Answers
  • Santiago Montes replied 5 Months ago.

    Error with statistical output function STAPRC

    3 Posts 730 Views
  • Michelle Jeuken replied 5 Months ago.

    Error message: Improper version of watqual.d3d and proctabl.d3d

    5 Posts 944 Views 1 Answer
  • AM
    Arjen Markus replied 7 Months ago.

    Illegal option for reaeration formula

    5 Posts 926 Views
  • Michelle Jeuken replied 8 Months ago.

    Trouble in modeling NO3 in a wastewater pond

    7 Posts 1120 Views
  • Amr Salama replied 8 Months ago.

    Sediment Water Interaction

    5 Posts 1345 Views 1 Answer
Showing 1 to 20 of 178 entries.