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

child killed: unknown signal

Khiet Le Thanh Bui, modified 2 Years ago.

child killed: unknown signal

Youngling Posts: 1 Join Date: 8/28/18 Recent Posts

Hi guys,


I'm a new user of Delft3d. When I tried to run the Waq (1), the program showed me this messenge. Could anyone help me solve this problem? Thank you.

Arjen Markus, modified 2 Years ago.

RE: child killed: unknown signal

Jedi Knight Posts: 223 Join Date: 1/26/11 Recent Posts

There is no indication that the program actually started. That usually means there is something wrong with your installation. Did you build Delft3D yourself or are you using a prebuilt version?

Mario Ruedas Racines, modified 1 Year ago.

RE: child killed: unknown signal

Youngling Posts: 5 Join Date: 2/1/17 Recent Posts

Hi everyone. I have the same problem. i'm using a prebuilt version. what i did wrong? how can i solve this? Please Help ME