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


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how to use delwaq ViewerSelector?

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how to use delwaq ViewerSelector?
viewwer selector water quality
Answer (Unmark)
7/21/16 7:39 AM
Hi i`m herajet john, from in koea

in delft3d-flow,
if user use ViewerSelector, result data(velocity, ssc, etc..) analysis by example keyword.
ex) vs.exe
use trim-*.dat def trim-*.def

trim-*.dat : data
trim-*.def : data unit, information

So then in water quality, how to use ViewerSelector?

water quality output data (NO4, etc) in *.ada

Please answer if good example keyword..
RE: how to use delwaq ViewerSelector?
Answer (Unmark)
7/25/16 2:29 PMas a reply to Hirejet John.
HI herajet john,

Have you tried QuickPlot yet? It is much easier to read water quality output with that tool.

i know use quickplot post-processing but, i will make it easy systems
Answer (Unmark)
8/1/16 7:57 AMas a reply to Michelle Jeuken.
i know use quickplot post-processing but, i will make it easy systems

in linux system, user make shell script and one click system is so easy.

so, i should use vs program to setup one click system.

I'd like to know what you make of it.
RE: i know use quickplot post-processing but, i will make it easy systems
Answer (Unmark)
8/15/16 9:59 AMas a reply to Hirejet John.
Have you tried vsi.exe? This starts an interactive version of vs. Delwaq uses the same type of files (dat+def). When you made the selection you can 'save a batch' that uses vs to extract the data multiple times in the same way.

You can finde de delwaq substance names in the table SUBST_NAMES in the DELPAR_PARAMS section
RE: i know use quickplot post-processing but, i will make it easy systems
Answer (Unmark)
9/2/16 11:27 AMas a reply to Michelle Jeuken.
Thanks for you great answer.

In my model,
Timeseries from hda file setting and automation one click system is complete. !!

But i can`t solved Another problem,

In my model, Flow sediment and water quality coupling equal time.
Grid is not execute aggregation and flow grid use water quality system.
coupling is *.hyd file.

Flow model output are added trim-file.
User connect trim-file from VSI.EXE, file structre m, n ,k.
So, user can seperate each time data or m,n data

waterquality all data file is added *.ada file.
user execute vsi.exe, can see array&data file name& each layer data.
But, flow model array is not equal water quality model.
How to solve this problem?

Can i know water quality file(*.ada) structure????

please good answer .
Always thanks..
From Hirajet John.
RE: i know use quickplot post-processing but, i will make it easy systems
Answer (Unmark)
9/26/16 11:06 AMas a reply to Hirejet John.
Hi Hirajet John,

Results in de delwaq map file have no m,n,k structure, alle segments are in a single vector per time step. The numbereing is defined in the binary lga-file for the first layer. The numbering for the second and futher layer is equal to the first layer + (layernumber - 1) * number of segments per layer.