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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

Tidal forces implementaions

Diego Uribe Suárez, modified 6 Years ago.

Tidal forces implementaions

Youngling Posts: 2 Join Date: 12/12/13 Recent Posts
I am working on Caribbean Sea model, and I am trying to implement the tidal forces option, but when I compare the results with tide measurements in the area, the spring and neap periods do not match with the results of the model. Any idea how can I fix it??
Anas Rahman, modified 6 Years ago.

RE: Tidal forces implementaions

Youngling Posts: 21 Join Date: 10/4/13 Recent Posts
Hi Suarez,

Have you checked the open boundaries for your model?

It is recommended NOT to use the same type of boundary conditions for all open boundaries.

As for me, it works using a combination of Water Level and Current.

Hope this helps

Giordano Lipari, modified 5 Years ago.

RE: Tidal forces implementaions

Youngling Posts: 12 Join Date: 3/23/11 Recent Posts
Hi Diego

I realise you may have fixed your issue for a long time. I bumped into your request for help right now.

If not yet, my question is whether the problem only regards the time shift or the amplitudes as well. Could you attach a plot comparing the computed and reference water elevation? Ideally they could be two: one for one spring-neap cycle and one for a narrower window of 2-3 days where you see the largest differences.

Based on this evidence we can speculate something on whether this comes from parameter/files settings or from some other more fundamental choices.

Hope this helps