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

Diatoms and Non-Diatoms

Humberto Pereira, modified 3 Months ago.

Diatoms and Non-Diatoms

Youngling Posts: 2 Join Date: 2/14/19 Recent Posts
Hello everyone,
I am using the Delft3D Water Quality model. In the Processes section, I defined the WAQ module and, in this module, I selected the Algae group for study (where I included the substances Diatoms and Non-Diatoms).
Here we have inputs and outputs of Diatoms and Non-Diatoms in gC/m3. These units refer to the biomass of phytoplankton, right? But the amount of carbon is related to the percentage of carbon in the molecules or the amount of total carbon?
Also, if I want to use only chlorophyll inputs can I do it too?
Thanks in advance.