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

Wave Input from a model other than SWAN

MS
Michael Salisbury, modified 6 Years ago.

Wave Input from a model other than SWAN

Youngling Posts: 4 Join Date: 8/27/13 Recent Posts
Dear Delft3D Users:

Is there a way to input wave data (e.g. radiation stresses) that have already been calculated by a wave model other than SWAN into the Delft3D hydrodynamic model? We have an existing wave model for an area and we want to couple it to a hydrodynamic/sediment transport model. Please let me know. Thanks!

Cheers,
Mike
Arjen Luijendijk, modified 6 Years ago.

RE: Wave Input from a model other than SWAN

Padawan Posts: 38 Join Date: 2/22/11 Recent Posts
Hi Mike,
Yes, this is possible, but requires some programming. You will have to create or modify the com-file (communication file between FLOW and WAVE (=SWAN)) yourself. There are matlab routines freely available (within Delft3D and openearthtools) that can help you to generate a communication file with wave data from your own wave model. You will have to interpolate your wave data to the grid on the com-file, which is your hydrodynamic grid. If you want to add temporal wave information, you will have to prescribe different time points in your com-file with the corresponding wave data per time point.

When running FLOW, activate Wave under processes but deactivate Online Delft3D-WAVE. FLOW will apply the wave data on a time step level and i believe will interpolate between the time points available on the com-file.

Good luck, Arjen
MS
Michael Salisbury, modified 6 Years ago.

RE: Wave Input from a model other than SWAN

Youngling Posts: 4 Join Date: 8/27/13 Recent Posts
Thanks, Arjen. Do you by chance know which Matlab file (or files) within the openearthtools is the appropriate one? We downloaded the openearthtools, but it's gigabytes of various Matlab files, Python scripts, etc. without a lot of documentation. Or, maybe someone has posted the code on another website? Please let me know your thoughts.

Thanks again for your help,
Mike
Arjen Luijendijk, modified 6 Years ago.

RE: Wave Input from a model other than SWAN

Padawan Posts: 38 Join Date: 2/22/11 Recent Posts
Hi Mike,

You can be inspired by the script: delft3d_createTrim.m, which you can find at \openearthtools\trunk\matlab\applications\delft3d\.

With vs_get.m you can open a com-file and retrieve all fields, while with vs_put.m you can overwrite fields of the com-file.
You can find vs_put.m within your delf3d checkout (or installation) under delf3d_matlab.

Hope this helps you, Arjen
HJ
Hirejet John, modified 6 Years ago.

RE: Wave Input from a model other than SWAN

Youngling Posts: 11 Join Date: 4/3/13 Recent Posts
Dear Arjen.

Hi, Arjen
Thanks for your nice answer.
Also i have problem for this question, too.
So, i try to download for this adress.
: \openearthtools\trunk\matlab\applications\delft3d\.

and, findout delft3d_createTrim.m. emoticon
But, not have user manual or example file.
Question..
you success this structure try to this program ??
So then, you have process for user??

Please quick answer for me. i`m interested in delft3d process.

in addition.

you answered this comment.!!
With vs_get.m you can open a com-file and retrieve all fields, while with vs_put.m you can overwrite fields of the com-file.
You can find vs_put.m within your delf3d checkout (or installation) under delf3d_matlab.

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where is the
vs_get.m
vs_put.m
file.?
ccccccccccccccccccccccccc


from Hirajet