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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

Grid exactly 1. following the coastline and 2. cutting of where sample ends

Robert de Boer, modified 6 Years ago.

Grid exactly 1. following the coastline and 2. cutting of where sample ends

Youngling Posts: 10 Join Date: 10/18/13 Recent Posts

I am working on a model for a study project. I am fairly new to Delft3D and I have this general question. I use Delft3D and sometimes DelftDashboard for the set-up of a flow calculation. Since I have my own bathymetry I don't use DelftDashboard for that, but I still would like to incorporate some convenient features of it.

1. Is it possible, i.e. in QUICKIN or RGFGRID to formulate a rectangular grid that follows the coastline (or a maximum z-value near the coastline) in a similar easy way, like you can do in DelftDashboard?
I mean that you create a grid that stops where the bathymetry is 0m?
Is that possible, and if so, how is that possible?

2. Follow up question. Is it possible to cut the grid off where the sample (my own bathymetry, xyz file) ends on the open boundary (sea) side of the sample?
For example in QUICKIN or RGFGRID?
How I know is the best way to define a polygon that 'tries' to follow the sample best, but this is not exact.
I want that the grid has exactly the same edge, boundary as the sample. Is that possible?