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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D-Flow Flexible Mesh

Cohesive sediments & muddy systems


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Edit algae parameterization in BLOOM

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Edit algae parameterization in BLOOM
delwaq - water quality bloom algae
Answer (Unmark)
3/14/17 2:07 PM
Hello everyone,

I have a question regarding the algae light efficiency parameterization in the bloom.spe file. I have some data from a publication of a P/I curve of Planktothrix and want to compare these values with the values used in BLOOM, but I don't know how. If I get it right, in the bloom.spe file are the irradiation values (negative log) and the corresponding function value and its derivative for every algae group. So my question is, how is this function value calculated? How can I obtain values from my P/I curve that are comparable with the values in bloom.spe?

Thanks a lot!

Best regards
RE: Edit algae parameterization in BLOOM
Answer (Unmark)
3/16/17 9:36 AMas a reply to Stefan Mirbach.
Ok I figured it out. The subroutine in bleffpro.f does exactly what I want.
RE: Edit algae parameterization in BLOOM
Answer (Unmark)
3/31/17 11:35 AMas a reply to Stefan Mirbach.
Sorry I didn't help you out earlier, but great that you have found it. Attached is an example of the new style 2.0 spe-file.
Attachments: bloom_new.spe (31.2k)