intro story DELWAQ


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


Message Boards


  • Cohesive sediments & Muddy systems

    1 Subcategory 44 Threads
  • dispersion of radionuclides

    Dear all, I'm beginner in DELFT 3D and I'm working on the dispersion of radionuclides. Please help me with the following issues. 1- Regarding the “DELWAQ” module, is it reasonable to study the dispersion of conservative radionuclide (which their transport equation is mainly the advection-diffusion Eq.) via coupling a transport code to DELFT 3D? or does DELFT have the ability to do such a simulation by itself? 2- If the coupling is reasonable, is it possible to define the advection-diffusion Eq. by means of a UDF and using its variables or is it doable trough the source code of DELFT? Is there a complete access to the source of the code? 3- By using UDF for this purpose, is it necessary to define certain kind of input data for UDF? or do we only use the computed current data from DELFT as input data for transport calculations in the UDF? Your assistance in this matter is greatly appreciated.
    0 Subcategories 3 Threads
  • Far-Field Tsunami

    Trans-Oceanic modeling and observations using DDB
    0 Subcategories 2 Threads
  • WAVE stops suddenly

    WAVE simulation stops suddenly in wave computation and wave+flow without any apparent error
    0 Subcategories 1 Thread