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



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Online flow-wave model with wave conditions specified in bcw file

Ismael Xique, modified 4 Years ago.

Online flow-wave model with wave conditions specified in bcw file

Youngling Posts: 7 Join Date: 7/6/15 Recent Posts
I am working on modeling a bay with one open boundary on the northern part of the model. I am using a wave-flow coupled model and want my wave and flow boundary conditions to vary timewise and spatially. To do this I defined multiple boundaries instead of one boundary on the northern portion of my bathymetry and joined the boundaries together. I then defined defined different conditions for each of them. Note that this was done for both wave and flow and that the wave direction was the same across all boundaries by varied with time. I have been able to get a reasonable wave direction with nominal wind - flow going southeast. When I add my wind data to the flow model, I get mean wave directions along the boundary that are in the opposite direction of those specified in the the bcw file. Any suggestions on how to make the wave directions along the boundary match the conditions specified by the bcw file? I have included a picture of the wind field for reference.