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


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Compilation Error of Delft3D in Centos 7 with Intel 19 Sathish D 0 287
Error in Delft3d Compilation - v67888 in macOS Catalina 10.15.7 (19H2) Luiz Ferreira 2 536
Error running make on ubuntu 16.04 uuid_generate Jean-Luc Shaw 3 5666
Compile Error on SLES 11 with 6075 Dirk Smit 1 4152
Compilation Error for the WAQ Module Dirk Smit 0 1411
Compiling Delft3d in OpenSuse 13.1 Giovanni Besio 10 9525
Problem in make when build.sh runs, ubuntu 14.04 Alejandro Paladio 2 3658
Compiling Delft3D on Mac OSX Dave Ortiz-Suslow 2 4787
compiling delft3d error, /usr/bin/ld: cannot find -lnetcdff Dave Ortiz-Suslow 6 7621
make breaks using gcc ... emark stanton 4 3276