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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 replied 18 Days ago.

    Error not finding delpar.exe - D-PART

    7 Posts 336 Views 0 Answers
  • 22
    21712235 21712235 21712235 replied 2 Months ago.

    Interaction D-Waq and D-Part

    3 Posts 1387 Views 0 Answers
  • ZW
    Zhanxian Wang replied 11 Months ago.

    suspended sediment and salinity from FLOW to WAQ?

    4 Posts 2069 Views 1 Answer
  • ST
    Serene Tay, modified 1 Year ago.

    Spatial wind input in d-particle track

    1 Post 1195 Views 0 Answers
  • xia wei replied 10 Months ago.

    Vegetation Decomposition Parameters

    4 Posts 3513 Views 1 Answer
  • VY
    veli yumruktepe replied 4 Years ago.

    Substance files

    15 Posts 15773 Views
  • Amaal Osama Fathy, modified 11 Hours ago.

    Increase WAQ simulation period than Flow?

    1 Post 7 Views
  • RK
    Ravi Kumar replied 12 Days ago.

    How to incorporate a new processes into the library?

    31 Posts 2616 Views
  • AM
    Arjen Markus replied 16 Days ago.

    Delwaq-Scale factor and units in Delwaq

    2 Posts 109 Views
  • AM
    Arjen Markus replied 18 Days ago.

    Modelling the oxygen production with photosynthesis

    2 Posts 313 Views
  • AM
    Arjen Markus replied 25 Days ago.

    Delwaq: ambient shear stress?

    4 Posts 237 Views
  • FP
    Francesco P, modified 25 Days ago.

    BLOOM: conversion fractions in mineralization process

    1 Post 135 Views 0 Answers
  • AM
    Arjen Markus replied 1 Month ago.

    Delwaq-Define input-Discharges

    4 Posts 198 Views
  • AM
    Arjen Markus replied 1 Month ago.

    incoming flow : zero concentration gradient of incoming flow.

    2 Posts 173 Views
  • AM
    Arjen Markus replied 1 Month ago.

    Cannot add or delete a new open boundary

    3 Posts 361 Views
  • AM
    Arjen Markus replied 1 Month ago.

    GMRES Error

    9 Posts 4981 Views 1 Answer
  • AM
    Arjen Markus replied 1 Month ago.

    Delwaq2: Scientific reference about numerical methods in Delwaq

    4 Posts 643 Views
  • GS
    Gholamreza Shiravani replied 1 Month ago.

    Delwaq2 NaN value for continuity-check

    3 Posts 559 Views
  • AM
    Arjen Markus replied 1 Month ago.

    Dwaq error

    2 Posts 342 Views
  • SR
    Shivanesh Rao replied 2 Months ago.

    delwaq time-step relative to telemac timestep

    5 Posts 502 Views
Showing 1 to 20 of 201 entries.