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. 
 

** PLEASE TAG YOUR POST! **

 

 

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

 

 

Message Boards

Initial conditions to nested grids

Fernando Barreto, modified 5 Years ago.

Initial conditions to nested grids

Padawan Posts: 74 Join Date: 6/21/12 Recent Posts
Hi all,
I'm running a nested grid system, and I have a question regarding the creating of initial conditions file for the nested grids. So my question is: is there any program that creates a initial conditions file from the parent grid? as the nesthd2.m program makes to the boundary conditions file.

Best regards,
Fernando Barreto
Renan Ribeiro, modified 5 Years ago.

RE: Initial conditions to nested grids

Padawan Posts: 54 Join Date: 3/23/11 Recent Posts
Hi Fernando,

How did you create the .ini file for the parent grid? You can use the same approach to create for the nested grid.

I don't know a program/tool that you could read the .ini file from a grid and create another one for a finer grid.

My suggestion is, if there aren't a lot of vertical layers, create the file manually, exporting the condition for a xyz file and interpolate it at the finer grid using QUICKIN.

Another solution is use a matlab tool available at OpenEarth. Look for the makeBctBccIni.m file, but you will need to convert your inicial condition to a specific .mat file with a constant grid spacing.

Regards,

Renan B. Ribeiro
Fernando Barreto, modified 5 Years ago.

RE: Initial conditions to nested grids

Padawan Posts: 74 Join Date: 6/21/12 Recent Posts
Hi Renan,
I created the parent grid from a hycom grid, with the same grid space and vertical layers number. To the refined grids I wanna reduce the number of vertical layers, what would oblige me to interpolate vertically. I'll try the routine makeBctBccIni.m.

Thanks.
Fernando Barreto, modified 5 Years ago.

RE: Initial conditions to nested grids

Padawan Posts: 74 Join Date: 6/21/12 Recent Posts
Renan,
With the routine makeBctBccIni.m can I to create a .ini file from the parent .ini file ? How do I convert .ini parent file to .mat ?
thanks
Renan Ribeiro, modified 5 Years ago.

RE: Initial conditions to nested grids (Answer)

Padawan Posts: 54 Join Date: 3/23/11 Recent Posts
Hi Fernando,

Answering your questions:
1. No.
2. There are a script that can read the ini file and convert to a .mat file (delft3d_io_ini.m), but not with the format you will need to use at the makeBctBccIni.m.


To use the HyCOM results the easiest way is:

Download the HyCOM results and convert it to the specific .mat format using this script getHYCOM3.m.

You will need to configure your inputs at .mdf normally, and also configure a .xml to call it using this command:
makeBctBccIni('ini','nestxml','nestastrofile.xml')

Take a look at the nestastrofile.xml at OpenEarth for an example.

Regards,
Renan