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. 




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



Message Boards

space-varying non-stationary spectral files

Joao Morim do Nascimento, modified 7 Years ago.

space-varying non-stationary spectral files

Hello community,

I have seen in SWAN and DELFT3D manual how to define spectral files in order to force our boundary conditions. However, it not mentioned anywhere how to define a 2D space varying non stationary spectral file. There is an example of a 1D nonstationary spherical coordinates file (but it appears that gives the same values for both locations) and there is an example of a 2D stationary Cartesian coordinates file (which obviously do not consider time).

I am trying to build a file that considers several locations and each location varies in time. Does anyone known what is the file structure?

Arnold van Rooijen, modified 7 Years ago.

RE: space-varying non-stationary spectral files

Hi Joao,

If I understand correctly you want to use bcw-files for your wave boundary conditions. In the Delft3D-Wave manual, appendix A.2.8.2 you can find a few example file layouts.

Hope this helps.

Renan Ribeiro, modified 7 Years ago.

RE: space-varying non-stationary spectral files

Padawan Posts: 55 Join Date: 3/23/11 Recent Posts

You can also use a .bnd, take a look at this post

Joao Morim do Nascimento, modified 7 Years ago.

RE: space-varying non-stationary spectral files

Hello Renan,

Thank you for your help. I still do not know how to do it. What I did was to produce a file for each location and upload it in the GUI. It is a lot of work and each boundary supports only 10 segments. I would like to just feed one file like you did...

If I do feel that one file with all the locations and use boundary orientation?

Please could you clarify me...I can send you my files..

My email is: