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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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Error reading .wnd file for computational grid

Chris Flanary, modified 7 Months ago.

Error reading .wnd file for computational grid

Youngling Posts: 4 Join Date: 10/10/14 Recent Posts

I'm getting an error in my tri-diag file at the initialization of my structure hydro model run that pertains to my *.wnd file and have some confusion about the proper size for the *.wnd file.

I built the *.wnd file according to the manual section A.2.8.1.  The manual states that the wind components are specified at the cell centres (water level points).  My grid has 173x301 grid points (from my .mdf file: MNKmax = 174 302 1), so my file has 301 rows of 173 values for each x_wind, y_wind, and air_pressure.

However, the example test case given by Adri in the following link has the .wnd file quantities specified at the size of M and N max, 1 over the number of grid points.



Which are the correct dimensions to supply the wind and air pressure quantities when using meteo_on_conputational_grid?

Thank you