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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 4 Months ago.

    Interaction D-Waq and D-Part

    2 Posts 777 Views 0 Answers
  • ZW
    Zhanxian Wang replied 8 Months ago.

    suspended sediment and salinity from FLOW to WAQ?

    4 Posts 1345 Views 1 Answer
  • ST
    Serene Tay, modified 10 Months ago.

    Spatial wind input in d-particle track

    1 Post 882 Views 0 Answers
  • xia wei replied 7 Months ago.

    Vegetation Decomposition Parameters

    4 Posts 2996 Views 1 Answer
  • VY
    veli yumruktepe replied 4 Years ago.

    Substance files

    15 Posts 14794 Views
  • shanas pr, modified 1 Day ago.

    "merging com files ..restarted hydrdynamic files...particle tracking"

    1 Post 18 Views 0 Answers
  • GS
    Gholamreza Shiravani, modified 3 Days ago.

    Delwaq2 NaN value for continuity-check

    1 Post 25 Views
  • Michelle Jeuken replied 6 Days ago.

    Temperature in HD and WQ

    6 Posts 170 Views
  • Rudy Schueder replied 3 Years ago.

    Erroneous spikes in BLOOM-related parameters in morning and evening

    5 Posts 3407 Views 1 Answer
  • AM
    Arjen Markus replied 1 Month ago.

    Particle Tracking

    4 Posts 194 Views 0 Answers
  • GS
    Gholamreza Shiravani replied 1 Month ago.

    Error Delwaq2 by increasing the number of Processors

    3 Posts 95 Views
  • GS
    Gholamreza Shiravani replied 1 Month ago.

    Error delwaq1 in BLOCK-7

    8 Posts 326 Views
  • Michelle Jeuken replied 1 Month ago.

    Source code for ddcouple

    4 Posts 270 Views
  • GS
    Gholamreza Shiravani replied 1 Month ago.

    Using ddcouple

    3 Posts 2975 Views 0 Answers
  • AM
    Arjen Markus replied 2 Months ago.

    child killed: unknown signal

    2 Posts 136 Views
  • SX
    ShengZhuo Xu, modified 3 Months ago.

    Questions about ERROR NEFIS message 8016

    1 Post 180 Views 0 Answers
  • MD
    meddy danial replied 3 Months ago.

    Boundary conditions

    5 Posts 3500 Views
  • AM
    Arjen Markus replied 3 Months ago.

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

    2 Posts 243 Views
  • Michelle Jeuken replied 4 Months ago.

    Delft Flow-WAQ coupling error

    4 Posts 2064 Views 0 Answers
  • AA
    Amelia Araujo, modified 5 Months ago.

    RadSurf file in BLOOM

    1 Post 773 Views
Showing 1 to 20 of 185 entries.