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

non-hydrostatic z-level and parallel

Markus Gross, modified 3 Years ago.

non-hydrostatic z-level and parallel

Youngling Posts: 7 Join Date: 12/10/11 Recent Posts

I am setting up a non-hydrostatic z-level model. It is running fine in serial, but needs 180days to run for three days emoticon

Therefore I would obviously like to run in parallel, but whilst it runs there is a clear sign of CPU boundaries imprinting and, depending on the revision number setting Nharea may or may not work. In the latest revisions I found it does not, because it compares the limits to the local grid numbering, not the global one. For rev. 6680 it "works" but I have not looked at the result yet, I guess it is not right (hence the change in the later revisions).

Therefore my question: It seems that it is ongoing work to get the z-level (non-hydro) to work in parallel, correct? If yes, is there any estimate when that should be working? I.e. is it a priority for deltares or not? If yes I would obviously not "waste" my time tying to get it to work, just to find that a month later you have done it properly. If not then I may be tempted to see what I can do.

Many thanks!
Best wishes,
Adri Mourits, modified 3 Years ago.

RE: non-hydrostatic z-level and parallel (Answer)

Yoda Posts: 1224 Join Date: 1/3/11 Recent Posts
Hi Markus,

Parallellization of the non-hydrostatic z-level model is currently not having a high priority. You are free to have a go at it. Please let me know if you want a branch in subversion or if you have questions.