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

BUG: Cohesive sediments won't work running parallel

João Lencart e Silva, modified 8 Years ago.

BUG: Cohesive sediments won't work running parallel

Padawan Posts: 71 Join Date: 3/30/11 Recent Posts
Hi All,

I'm running a configuration with a single fraction of cohesive sediments.
I realised that when using the parallel version of the code there is a HUGE jump in sediment concentration at the second time step I record (I'm running dt = 30s and dt_hist = 10 min).
When I run with just a single core everything looks fine.

I've tried this in a gnu compiled 64bit binary of and of

Is this a documented bug or something new?
Let me know if you need more details/testing.


Qinghua Ye, modified 8 Years ago.

RE: BUG: Cohesive sediments won't work running parallel

Jedi Council Member Posts: 610 Join Date: 3/2/11 Recent Posts
Hi João,

I have tested my case with one mud fraction. And the results didn't look very strange.

Can you share your case with me for better understanding of your question? My contact is