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

Initial Condition

WK
WEN ZEE KWONG, modified 6 Years ago.

Initial Condition

Youngling Posts: 3 Join Date: 8/23/13 Recent Posts
Hi all,

I having hard time in generating initial condition for M =189 x N =13 grid with 20 layers.
actually I wanted to input the initial condition of the salinity, and I am following the guide from the manual.

{13 records with 189 values each} {Water elevation}
{13 records with 189 values each} {U-velocity component in layer 1 - 20}
{13 records with 189 values each} {V-velocity component in layer 1 - 20}
{13 records with 189 values each} {Salinity in layer 1 - 20}

However, it always giving me "Premature EOF in file: <filename.ini>".
is it anything to do with the restriction of the maximum record length in the free formatted file is 132?
Please advice.

Thanks in advance

Kwong
WK
WEN ZEE KWONG, modified 6 Years ago.

RE: Initial Condition

Youngling Posts: 3 Join Date: 8/23/13 Recent Posts
hi all,

I had try some troubleshooting, I found out that when I put the process for pollutant and tracers, the model will not run.
How is it possible?
please advice.

thanks in advance

Kwong
Qinghua Ye, modified 6 Years ago.

RE: Initial Condition

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Hi Kwong,

For your first question, you can choose map file as the initial condition. Refer to the manual Section 4.5.5, you have several options for initial conditions, INI file in ASCII format is one of them.

For your 2nd question, it is not possible that with pollutant and tracer, the binaries cannot work. There must be related to the mdf file itself. Pls open the mdf using GUI and then try to save the mdf again. Then try again.

Regards,

Qinghua
MR
mohammad rahmanian, modified 6 Years ago.

RE: Initial Condition

Youngling Posts: 6 Join Date: 5/27/12 Recent Posts
Hi Qinghua Ye

Your description was excellent. But if the Salinity is different from on grid , How can it be defined in an initial condition file <ini>.
For Example, For grid Mmax=100 , Nmax=20 , deltaX=1 km , deltaY=1 km ,Salinity for one half =31 and the other half is 25 [ppm].

Best regards.

m.rahmanian
Qinghua Ye, modified 6 Years ago.

RE: Initial Condition

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Hi mohammad,

In that case, you can only use the option of INI file. Then you have to do it very carefully... I would suggest to make a simple model to try first.

Enjoy the modeling!

Qinghua
MR
mohammad rahmanian, modified 6 Years ago.

RE: Initial Condition

Youngling Posts: 6 Join Date: 5/27/12 Recent Posts
Hi Dear.Qinghua Ye

Special thanks for your suggestion and your concern but I need to influence of confluence of fresh water and salt water..
According to this page "http://oss.deltares.nl/web/delft3d/coast-/-estuary/-/message_boards/view_message/266881/maximized" I understand how can define initial condition file <ini>.
it runs for 2D simulation But it has an error to run 3D simulation and it can not work.
Before starting simulation "ERROR Premature EOF in file initial-condition.ini" appears.
Qinghua Ye, modified 6 Years ago.

RE: Initial Condition

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Hi mohammad,

The error indicates that the ini file is not correct. The data in the ini file is less than the model wants. Refer to Delft3D-FLOW manual A.2.9.

"
In total there will be (Cmax+2)*Kmax + 1 matrices of Mmax Nmax where:
Mmax number of grid points in M direction.
Nmax number of grid points in N direction.
Kmax number of layers.
Cmax number of constituents (including temperature, salinity, secondary flow)."

So you have to double check your ini file.

Regards,

Qinghua
WK
WEN ZEE KWONG, modified 6 Years ago.

RE: Initial Condition

Youngling Posts: 3 Join Date: 8/23/13 Recent Posts
Hi Qinghua,

Thank you for your advice.

Regards,
Kwong
SK
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