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. 
 

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

 

 

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Morphology Issues with DD

CD
Clint Doak, modified 4 Years ago.

Morphology Issues with DD

Youngling Posts: 1 Join Date: 12/14/15 Recent Posts
Hello All

I am having an issue running a morphology simulation using Domain Decomposition. The simulation will run within the Flow module (with no wave coupling) with no issues. The simulation will also run with a coupled Flow-Wave simulation on a single domain. However, when I try to run domain decomposition coupled with the Wave simulation the sediment seems to disappear as soon as the "spin-up interval before morphological changes" is reached. I say disappear as it does seem to be completely removed from the simulation - the sediment thickness doesn't reduce to zero, it simply gives a null value. Furthermore, the bed depth doesn't change when the sediment disappears.

Is anyone able to advise what could be happening here?

Any help would be appreciated.

Thanks
Clint