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

Simulation crashed. How to continue from where it stops?

Anas Rahman, modified 6 Years ago.

Simulation crashed. How to continue from where it stops?

Youngling Posts: 21 Join Date: 10/4/13 Recent Posts
Hello everyone,

I was running a long flow simulation in Linux (approximately 30 days to finish the computation). Then the simulation crashed at about 60%. I am not yet sure whether it was caused by the system or the software

Does anyone know how I can continue from where it stopped? I really hope I am able to resume the simulation, and not to start all over again if possible.

Thank you !

Mihael Souza, modified 6 Years ago.

RE: Simulation crashed. How to continue from where it stops? (Answer)

Padawan Posts: 65 Join Date: 10/11/12 Recent Posts
Hi Anas,

Did you define the creation of restart files during your simulation? If so, in the Delft3D directory there should be a bunch of tri-rst files. These files have the time stamp on them, so you know in which part of the simulation they were created. If you want, you can update the start time in the MDF to match one from a tri-rst file, and in initial conditions choose to use a Restart file. This will resume your simulation from that point on.

If you want to know if the simulation crashing was due to a system or model error, take a look at the tri-diag files. If any instabilities provoked the crash, it will be written in there. This could at least give you an indication with the problem was on your simulation.

Kind regards,

Adri Mourits, modified 6 Years ago.

RE: Simulation crashed. How to continue from where it stops?

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

One addition to Mihael's answer: you can also restart using a map-file. See the manual, section "4.5.5 Initial conditions".