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intro story DELWAQ

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.

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Sub groups
D-Flow Flexible Mesh
DELWAQ
Cohesive sediments & muddy systems

 

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Model dimensions too large for DELWAQ

SM
Stefan Mirbach, modified 1 Month ago.

Model dimensions too large for DELWAQ

Youngling Posts: 15 Join Date: 1/3/12 Recent Posts
Hello everyone,
I'm trying to set up a water quality simulation coupled to the results of a Delft3D-Flow simulation. When I run the preprocessor delwaq1 I get the following error message:
ERROR  : real array is too big. Unable to create pointer
I found the related passage in the source code in file dhmmra.f, it's due to an integer overflow of the variable counting the size of an array. If I change the variable to an 8 byte integer, delwaq1 runs without an error. But of course, delwaq2 crashes because the array is used in many other parts of the program.
Is there any way to avoid this error and get DELWAQ to run with large models?
Best regards
Stefan
delwaq
SM
Stefan Mirbach, modified 1 Month ago.

RE: Model dimensions too large for DELWAQ (Answer)

Youngling Posts: 15 Join Date: 1/3/12 Recent Posts
I already found a solution. There is a branch in the repository for big DELWAQ models.