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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Wave interference with no flow boundaries

IL
Ivar Lokhorst, modified 2 Years ago.

Wave interference with no flow boundaries

Youngling Posts: 3 Join Date: 3/29/17 Recent Posts
Dear all,

I am building a 2D depth averaged FLOW-WAVE model, but there seems to be a problem with my no flow boundaries. I have a rectangular linear sloping grid with a tidal boundary on its west end and 3 no flow (free-slip) boundaries on the other edges. I believe my waves are interfering with the no-flow boundary as the HRMS wave-height decreases closer to the boundary (see attached file). I have tried to run both on the same computational grid and with a nested grid but both with the same result. I attached the MDW file, the flow grid (matlabgrid) and the wave grid (sometimes used, sometimes not).

I really hope someone can help me out.

Best regards,
Ivar