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

problem coupling waves and flow

Mallory Barkdull, modified 4 Years ago.

problem coupling waves and flow

Youngling Posts: 3 Join Date: 2/12/13 Recent Posts

I have a 2D (x-y) model that works great when I just have FLOW running, but when I add waves it runs for about 5% of the time and then gives me the following error:

C:\Users\mbarkdu\Dropbox\model runs\A_waves_tides_wind_2d>rem exit
>>...End of SWAN run
Allocate output fields
Read SWAN output
WARNING: Found negative value(s) for dissip(2) in swanout file;
value(s) set to zero
Map WAVE parameters to FLOW grid 1

forrtl: The process cannot access the file because it is being used by another process.

forrtl: severe (28): CLOSE error, unit 32, file "Unknown"

Image PC Routine Line Source
libifcoremd.dll 100AAD2A Unknown Unknown Unknown
libifcoremd.dll 1001D15B Unknown Unknown Unknown
libifcoremd.dll 1001C31B Unknown Unknown Unknown
libifcoremd.dll 10011418 Unknown Unknown Unknown
wave.exe 00474194 Unknown Unknown Unknown
wave.exe 00401EAE Unknown Unknown Unknown
wave.exe 004E63F3 Unknown Unknown Unknown
wave.exe 004E44AA Unknown Unknown Unknown
KERNEL32.DLL 74E97C04 Unknown Unknown Unknown
ntdll.dll 7755AB8F Unknown Unknown Unknown
ntdll.dll 7755AB5A Unknown Unknown Unknown

Does anyone know how to fix this problem?

River Dang, modified 5 Months ago.

RE: problem coupling waves and flow

Youngling Posts: 3 Join Date: 5/29/15 Recent Posts
Hi M.B, i have the same problem. Did you know how to fix this yet?