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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

Parrallel running with bedload boundary conditions

Richard Measures, modified 11 Months ago.

Parrallel running with bedload boundary conditions

Jedi Knight Posts: 178 Join Date: 3/23/11 Recent Posts

We have successfully used a *.bcm file to specify upstream bedload transport into a river model. However, the model now no-longer runs in parallel (it does without the bcm file). There is no error message in the tri-diag file for the first core, but for all the other cores the tri-diag includes:

Sediment fraction 1: Sediment Sand

*** ERROR Unknown boundary "Upstream" in sediment\morphology.mor

*** ERROR Flow exited abnormally

This seems like a bug? Are there any work arounds? Is this an easy fix in the source code? It is not listed as a limitation in https://svn.oss.deltares.nl/repos/delft3d/trunk/src/engines_gpl/flow2d3d/doc/parallel_status.txt

Also, in the latest version of the manual online, section B.9.7 Sediment transport and morphology boundary conditions no longer exists (this is the section which describes the format of the *.bcm file) - we are using an older version of the manual which still has this section. Is it's omission from the latest version an error or has it been removed for a reason?