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

Offline WAV-FLOW-sediment transport coupling

Ben Williams, modified 8 Years ago.

Offline WAV-FLOW-sediment transport coupling

Jedi Knight Posts: 114 Join Date: 3/23/11 Recent Posts

I would like to be able to make an offline coupling of WAV and FLOW to calculate wave-induced current and subsequently sediment transport. Tidal level will be uniform and there will be no tidal currents at the site - only wave-induced current.

Is there a way to do this? Or would one be required to use the more time demanding online coupling?

Best regards,

Andrew Stevens, modified 8 Years ago.

RE: Offline WAV-FLOW-sediment transport coupling (Answer)

Youngling Posts: 11 Join Date: 4/25/11 Recent Posts

I think you can do this with the water quality module (WAQ). I don't have personal experience setting up offline sediment transport, so I can't advise on the particulars. From what I understand, WAQ takes output from FLOW (via the COM file) and computes advection and diffusion of a variety of substances (including sediment). Not sure how sediment transport and exchange with the bed is dealt with. Obviously, there will be no feedback between the morphological change and hydrodynamics...probably OK if change is small.

Ben Williams, modified 8 Years ago.

RE: Offline WAV-FLOW-sediment transport coupling

Jedi Knight Posts: 114 Join Date: 3/23/11 Recent Posts
Hi Andrew, thanks for the tip. It is not entirely clear if one can do this with WAQ. The manual hints that one could, but this is a moot point if one is using the open-source version of Delft3D, as it does not include the WAQ module.

All the best,