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

Huge influence of wind on waves in shallower areas of my domain

Davi Carneiro, modified 4 Years ago.

Huge influence of wind on waves in shallower areas of my domain

Youngling Posts: 8 Join Date: 9/25/14 Recent Posts
[code][/code]Hello Delft3D users, I am running the standalone DELFT3D-WAVE with a nested configuration. Both of the grids use GFS winds with 1 hour of temporal resolution. If you look at the figure attached (run using GFS winds minus run without winds) for the inner grid, you see that in deeper regions (from the entrance of the bay to offshore regions) there is no big differences between runs, but then this difference is highly amplified in the shallow areas with the effect of the winds. The activation of the wind parameter (with input of wind data) is the only difference between the runs. All the other parameters follow the default configurations and values of DELFT-3D Wave module. I have two buoys to compare my model results. One is located in the deeper regions (where the differences are OK) and the model is simulating there very well. However, for the buoy located inside of the bay, my simulation is overestimating the wave height values due to this wind effect. Has anyone had similar experience with the sensitivity of the wave model to the winds in shallower areas? If so, how have you done to tune this effect? Just to reinforce that for my buoy located at deeper region the results are really good. The problem is with the shallower areas inside of the bay. Thank you very much! [img][url=https://postimg.org/image/d1bca9a7d/][img]https://s12.postimg.org/d1bca9a7d/IMG_7858.jpg[/img][/url][/img]