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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

Fixed Weir Issue

Emma Nuss, modified 2 Years ago.

Fixed Weir Issue

Youngling Posts: 1 Join Date: 3/14/17 Recent Posts
Hi all,

I am having an issue with the addition of fixed weirs in a model configuration for a coastal estuary region with many small ponds with levees. It appears from my tests and what I've read in the technical manual, that the model will not run if the fixed weir points bisect a grid cell. When I remove the points that bisect any grid cells, the model runs fine, but I need to add in the levee features to represent the area correctly. Is there a way to edit the fixed weir points and snap them to the grid, so that they are aligned with the boundaries of the cell? Or any other potential solutions to this problem?

Your help is much appreciated, thanks!