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


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ERROR: Binary/unformatted file does not have the correct size

Ernesto Molinas, modified 1 Year ago.

ERROR: Binary/unformatted file does not have the correct size

Youngling Posts: 8 Join Date: 1/27/12 Recent Posts


I finding the following error while runing the preprocessor for delwaq:


Input comes from binary file: Q1.par                                                                                                                                                                                                                                                          
 ERROR: Binary/unformatted file does not have the correct size: Q1.par                                                                                                                                                                                                                                                          
        The size should not be zero and it should be a whole multiple of 982764 (= 4*(1+2*122845))
 ERROR reading the data block !
 ERROR encountered in processing this input item !

 ERROR. Reading block   7 !! Check input file !!

 ERROR. Too many and/or invalid data in block   7 !! Check input file !!



The only strange issues i found in block 7 are this mesages:

; 'ACTIVE_EMERSION' - has missing value or model not suited
; 'Zthreshold' - has missing value or model not suited
; 'MaxIterations' - has missing value or model not suited


In the manual it says these commands are related do z-model conversion, but i'm usig regular sigma layers. I'm not sure how to fix it.


if anyone has a clue I would be grateful.