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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


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time-varying wave boundary conditions with bcw file for coupled flow+wave

Kevin Hanegan, modified 7 Months ago.

time-varying wave boundary conditions with bcw file for coupled flow+wave

Youngling Posts: 6 Join Date: 7/2/11 Recent Posts


In a coupled flow+wave simulations, I'm trying to apply spatially-constant but time-varying wave BC's with the .bcw file method. My production runs will have too many timepoints to use the wavecon approach. The simulation runs fine when constant wave boundaries are specified. When defining a TseriesFiles and Timepoints in the .mdw file, the wave boundary conditions from the .bcw file are not being passed correctly to SWAN. Instead, NaN values (-999.00) are given fro all parameters in the swan.inp file (see attached). Note that the fine flow and wave grid is nested into a larger, coarse grid for the wave calcs. Are there any limitations to this method that I'm potentially violating? Does anyone see any issues with my setup? I've attached my .mdw and .bcw files. 

Thank you,