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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Morphodynamics with specified input sediment concentration in parallel

BY
Bing Yuan, modified 12 Days ago.

Morphodynamics with specified input sediment concentration in parallel

Youngling Posts: 2 Join Date: 9/22/17 Recent Posts
Question: can the model be applied to morphodynamics with specified input sediment concentration in parallel?
I am working on long-term morphodynamis of estuaries. A simple model with a funnel shape that represents an estuary was built. A river boundary with a specified sediment concentration was present at the upsteam. The strange thing is that different results were obtained between the cases with and without parallel setting (model versions 7545 & 65957 have been tested). No parameters were changed except the batch file for the parallel run. 
In the parallel run, it seems that equilbrium boundary condition was applied even though in the '.mor' file the key for equilibrium sand concentration was off. 
Any one had the same problem? Can the model be applied to morphodynamics in parallel with specified input sediment concentration? Thanks! 
Regards,
Bing