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

problem with river sediment simulation

Mathilde Henri, modified 5 Years ago.

problem with river sediment simulation

Youngling Posts: 1 Join Date: 5/17/15 Recent Posts
Hello everyone,

I'm using Delft3d for my dissertation. I'm trying to model the hydrodynamics and morphological changes due to a turbine in a river near a meander.
It works for the hydrodynamic part but I have troubles with the sediment simulations. It looks like the sediments increase up to 10^38 after a few time steps and then completely disappear after another few time steps.
Also, the simulation crashes if I put the 'spin-up interval before morphological changes' before the sediments disappear because of a water level error but it runs to 100% otherwise.

I've been struggling with this problem for a few weeks now and have tried a lot of things but never managed to get the sediments to appear til the end of the simulation time.

Has anyone had a similar problem or would anyone have an idea about what creates that problem?

Thank you very much.