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

Modelling the oxygen production with photosynthesis

Yuanyi Li, modified 2 Years ago.

Modelling the oxygen production with photosynthesis

I am modelling the algae bloom and dissolved oxygen in a lake. I searched though the PLCT but failed to find the way to link the algae growth and the oxygen production.  Could any one told me how to achieve this and point the substance and related processes should be ticked on?

Arjen Markus, modified 2 Years ago.

RE: Modelling the oxygen production with photosynthesis

Jedi Knight Posts: 223 Join Date: 1/26/11 Recent Posts

If you use the BLOOM approach, then selecting dissolved oxygen as a model substance and selecting the process "BLOOM II alglae module" is essentially enough to turn on primary production by algae and the production of dissolved oxygen as a result. Several other processes are required to really turn it on, but if you inspect the list of fluxes (the way a process influences a substance), you should see "uptake of carbon by algae growth (dPrProdOxy)". This flux is used to calculate how much organic carbon is formed but also how much dissolved oxygen is produced, as these two go hand in hand.