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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



  • Maria Gracioto, modified 4 Hours ago.

    Error not finding delpar.exe - D-PART

    1 Post 2 Views 0 Answers
  • 22
    21712235 21712235 21712235 replied 1 Month ago.

    Interaction D-Waq and D-Part

    3 Posts 1197 Views 0 Answers
  • ZW
    Zhanxian Wang replied 10 Months ago.

    suspended sediment and salinity from FLOW to WAQ?

    4 Posts 1843 Views 1 Answer
  • ST
    Serene Tay, modified 1 Year ago.

    Spatial wind input in d-particle track

    1 Post 1101 Views 0 Answers
  • xia wei replied 9 Months ago.

    Vegetation Decomposition Parameters

    4 Posts 3374 Views 1 Answer
  • VY
    veli yumruktepe replied 4 Years ago.

    Substance files

    15 Posts 15535 Views
  • AM
    Arjen Markus replied 3 Days ago.

    Delwaq-Define input-Discharges

    4 Posts 72 Views
  • AM
    Arjen Markus replied 5 Days ago.

    incoming flow : zero concentration gradient of incoming flow.

    2 Posts 71 Views
  • SB
    suresh babu replied 11 Days ago.

    How to incorporate a new processes into the library?

    30 Posts 1812 Views
  • AM
    Arjen Markus replied 11 Days ago.

    Cannot add or delete a new open boundary

    3 Posts 180 Views
  • AM
    Arjen Markus replied 14 Days ago.

    GMRES Error

    9 Posts 4778 Views 1 Answer
  • AM
    Arjen Markus replied 18 Days ago.

    Delwaq2: Scientific reference about numerical methods in Delwaq

    4 Posts 442 Views
  • GS
    Gholamreza Shiravani replied 19 Days ago.

    Delwaq2 NaN value for continuity-check

    3 Posts 364 Views
  • AM
    Arjen Markus replied 25 Days ago.

    Dwaq error

    2 Posts 207 Views
  • SR
    Shivanesh Rao replied 1 Month ago.

    delwaq time-step relative to telemac timestep

    5 Posts 358 Views
  • YX
    yu jia xin, modified 1 Month ago.


    1 Post 247 Views
  • YX
    yu jia xin replied 1 Month ago.

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

    3 Posts 409 Views 0 Answers
  • 22
    21712235 21712235 21712235, modified 1 Month ago.

    Hello, everyone, after using parallel computing flow module, I chose to cal

    1 Post 240 Views 0 Answers
  • 22
    21712235 21712235 21712235, modified 1 Month ago.


    1 Post 237 Views
  • Michelle Jeuken replied 2 Months ago.

    Temperature in HD and WQ

    6 Posts 631 Views
Showing 1 to 20 of 196 entries.