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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



  • Coastal/Estuary

    2 Subcategories 752 Threads

    0 Subcategories 178 Threads
  • General

    7 Subcategories 1069 Threads
  • Lake

    0 Subcategories 40 Threads
  • River

    0 Subcategories 165 Threads
  • GL
    Gabriel Lim replied 2 Days ago.

    Running examples after compilation - VS15 + IFort18 + Trunk Revision 8969

    11 Posts 638 Views 0 Answers
  • JO
    Jennifer Ogrodnick replied 1 Month ago.

    Quickplot output argument error

    2 Posts 1391 Views 0 Answers
  • JM
    Julio Mesa, modified 3 Months ago.

    Quickplot in newer version of Matlab

    1 Post 649 Views 0 Answers
  • MV
    Miguel Vigo, modified 5 Months ago.

    New Keyword DuneAvalan

    1 Post 716 Views 0 Answers
  • HM
    Hanieh Mohamadi Moghadam, modified 5 Months ago.

    Steep slope from deep water to coastline

    1 Post 763 Views 0 Answers
  • AG
    alessandro gerevini, modified 7 Months ago.

    Problem with layers in delft3D

    1 Post 1048 Views 0 Answers
  • DC
    dong cheng replied 6 Months ago.

    Clean up of model failed

    2 Posts 1373 Views 0 Answers
  • NV
    Nate VanArendonk, modified 7 Months ago.

    Delft3D-SWAN error - Segementation Fault (core dumped)

    1 Post 1107 Views 0 Answers
  • AD
    A D, modified 7 Months ago.

    Depth averaged velocities off by a factor of 10.

    1 Post 1016 Views 0 Answers
  • YK
    Yitping Kok, modified 8 Months ago.

    Compiling Delft3d on OS X Yosemite successful but...

    1 Post 1113 Views 0 Answers
  • EE
    Esther Espinoza, modified 8 Months ago.

    Different reference levels in Delft3d Flow (for water level simulation)

    1 Post 1242 Views
  • JK
    JIN-YOUNG KIM, modified 8 Months ago.

    ERROR: While copying swan.inp to waves.swn, errorcode: 5

    1 Post 1182 Views 0 Answers
  • Liu Karl, modified 8 Months ago.

    The question about nested

    1 Post 1187 Views 0 Answers
  • JA
    Juanma Abad, modified 8 Months ago.


    1 Post 1264 Views 0 Answers
  • HS
    Hannah Snow, modified 9 Months ago.

    Delft3d WAVE grid cell centers vs corners

    1 Post 1199 Views 0 Answers
Showing 1 to 20 of 121 entries.