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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

Which option to compue cell centre values should I use? (Flow module)

Esther Espinoza, modified 2 Years ago.

Which option to compue cell centre values should I use? (Flow module)

Padawan Posts: 25 Join Date: 4/6/17 Recent Posts
Hi, I hope you can help me with this. I'm new with delft3d but I'm using the flow module to model water level, my study area is an estuary. I made the grid and save the dep file but I didn't do it at the cell centers. I mean, when I made the interpolation I never choose grid cell centers, I just finished the whole interpolation and save the dep.

So now on the flow module (Domain-Bathymetry) I should choose the option "Values specified at Grid cell corners" right? Then, I'm not sure which of the three options :Max, Mean or Min to choose for "Cell centres values computed using" should I use. Which of these options would be the best for my type of study area?

Or maybe I can change the dep saving it at the grid cell centres without doing the whole interpolation again on Quickin?

Sorry if this is too obvious to ask. Thanks!

amr salama, modified 2 Years ago.

RE: Which option to compue cell centre values should I use? (Flow module)

Youngling Posts: 12 Join Date: 9/16/15 Recent Posts
Hi Esther Espinoza

I am interested in modeling hydrodynamics in an estuary which could resemble your case. for " Values Specified at " I have selected " Grid Cell Corners " and for " Cell Center Values Computed Using " i have selected " Max " . it works fine with me.