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

 

 

Message Boards

How to switch off the advection terms in the Delft3D momentum equation?

GW
Guoxiang Wu, modified 6 Years ago.

How to switch off the advection terms in the Delft3D momentum equation?

Youngling Posts: 16 Join Date: 8/20/11 Recent Posts
Hi all,

I want to turn off the horizontal advection terms, to see the effects of nonlinear advection in the generation of tide asymmetry. I checked the code, and target the subroutines 'mom_cyclic' and 'mom_cw', which are called by subroutine 'uzd' and 'sud' in serial, respectively, in each half-timestep of the ADI scheme. Advection terms is calculated there and can be output. But when solving the momentum equations, the code for advection terms are not so clear and straightfoward. Does anybody know to switch off this term? Any suggestions are welcome!

Guoxiang
GW
Guoxiang Wu, modified 6 Years ago.

RE: How to switch off the advection terms in the Delft3D momentum equation?

Youngling Posts: 16 Join Date: 8/20/11 Recent Posts
the code is so sophisticated. Does anybody know where can I get the descriptions of variables?

Any response?