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



Message Boards

Thatcher-Harleman time lag in WAQ

Amelia Araujo, modified 5 Years ago.

Thatcher-Harleman time lag in WAQ

Youngling Posts: 13 Join Date: 7/7/15 Recent Posts

I have used the value of -1 min for the Thatcher-Harleman time lag boundary condition in FLOW because I want a zero gradient at the boundaries. Now I would like to set up the same boundary condition in WAQ. How can I do that (here the format for time lag has to be hh mm ss)?

Anonymous Anonymous, modified 5 Years ago.

RE: Thatcher-Harleman time lag in WAQ

Jedi Master Posts: 333 Join Date: 7/30/20 Recent Posts
Hi Amelia,

Not sure I understood your question correctly, but if you want no time lag at all just use "00 00 0000 00 00 00" in the GUI (or 000000000000000 in the *.inp).

tyron woodley, modified 11 Months ago.

RE: Thatcher-Harleman time lag in WAQ

Youngling Posts: 15 Join Date: 3/14/20 Recent Posts
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