intro story Coast / Estuary

Coast / Estuary

Coastal systems are among the most dynamic physical systems on earth and are subject to a large variety of forces. The morphodynamic changes occurring to coastlines worldwide are of great interest and importance. These changes occur as a result of the erosion of sediments, its subsequent transport as bed load or suspended load, and eventual deposition. 
 
Estuaries are partly enclosed water bodies that have an open connection to the coast. Estuaries generally have one or more branching channels, intertidal mudflats and/or salt marshes. Intertidal areas are of high ecological importance and trap sediments (sands, silts, clays and organic matter).
Within the Delft3D modelling package a large variation of coastal and estuarine physical and chemical processes can be simulated. These include waves, tidal propagation, wind- or wave-induced water level setup, flow induced by salinity or temperature gradients, sand and mud transport, water quality and changing bathymetry (morphology). Delft3D can also be used operationally e.g. storm, surge and algal bloom forecasting. 
 
On this discussion page you can post questions, research discussions or just share your experience about modelling coastal and/or estuarine systems with Delft3D FM. 
 

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Sub groups
D-Flow Flexible Mesh
DELWAQ
Cohesive sediments & muddy systems

 

 

Message Boards

Reading coupling files

Ben Williams, modified 7 Years ago.

Reading coupling files

Jedi Knight Posts: 114 Join Date: 3/23/11 Recent Posts
Hi,

Is there a limit for the size of coupling files that can be read by Delwaq?

I have a water quality simulation of 1 month, with FLOW velocities etc taken from a 3D FLOW model of roughly 200*300 and 5 sigma layers. COM output is every 20 minutes.

I don't have an issue with reading in the COM file using .hyd, but when I try and read in the bed shear stresses output from the flow model, I get a 'grids do not fit' error message.

If I produce coupling files for just two weeks from the same FLOW model and COM file, I don't have an issue.

Are there any work around for this?

Thanks,

Ben
U
Jan van Beek, modified 7 Years ago.

RE: Reading coupling files

Hi Ben,

This looks like an old problem with WAQ-GUI thath cannot handle binary files bigger then 2 Gb. This is solved in recent version but I do not know which one you use. A work around is to import the smaller file in the GUI and after saving change in the <runid>.inp file the filename for the *.tau file to the big file.

The computational core of delwaq can handle files of any size.

Jan
Ben Williams, modified 7 Years ago.

RE: Reading coupling files

Jedi Knight Posts: 114 Join Date: 3/23/11 Recent Posts
Hi Jan,

That was very useful advice. Yes, I am using an older version of the Delwaq GUI.

I shall try to modify in the .inp file directly, as suggested.

Thanks,

Ben