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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time-varying wave boundary conditions with bcw file for coupled flow+wave

Kevin Hanegan, modified 1 Year ago.

time-varying wave boundary conditions with bcw file for coupled flow+wave

Youngling Posts: 6 Join Date: 7/2/11 Recent Posts


In a coupled flow+wave simulations, I'm trying to apply spatially-constant but time-varying wave BC's with the .bcw file method. My production runs will have too many timepoints to use the wavecon approach. The simulation runs fine when constant wave boundaries are specified. When defining a TseriesFiles and Timepoints in the .mdw file, the wave boundary conditions from the .bcw file are not being passed correctly to SWAN. Instead, NaN values (-999.00) are given fro all parameters in the swan.inp file (see attached). Note that the fine flow and wave grid is nested into a larger, coarse grid for the wave calcs. Are there any limitations to this method that I'm potentially violating? Does anyone see any issues with my setup? I've attached my .mdw and .bcw files. 

Thank you,