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


Nill Ng, modified 4 Years ago.


Youngling Posts: 23 Join Date: 4/16/15 Recent Posts
Hi Everyone,

When using the "STAGEO" function of the .stt (say for E.coli), several different results were generated with different prefixes including "Geo_EColi", "T_Geo_EColi" and "ALL_Geo_EColi".
These results are numerically different most of the time.
The explanation of the "STAGEO" function is quite brief in the manual and does not even mention there will be 3 results.
Does anyone know the differences between the calculation these geometric mean results?

While it is ok to output the timeseries to calculate the geometric mean I wanted manually at selected location, this cannot be done with contour plots.