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

Morphology model

CV
cristina viola, modified 2 Years ago.

Morphology model

Youngling Posts: 3 Join Date: 3/10/16 Recent Posts
Dear all,

I am a curious Mozambican engineer, trying to learn and progress in coastal modelling. I am a bit familiar with Delft3D (not yet with flexible mesh), but I am struggling now trying to calibrate or improve a model I have been working on.

I am using Delft 3D to model a tidal inlet with a small town in which we are trying to see how the coast changes with time due to waves and tides. For that matter I have set a coupled model (flow and wave) which I send attached both mdf and mdw files. Also attached I send a result of my model which is my main concern as there is a problem along my Neumann Boundary, a stain with high water levels while the Sea Boundary has no water at all. It seems like the communication between the two grids is not OK and somehow only the Neumann boundary receives some water. I have tried to set the model again and use a different bathymetry but so far the stain is still there. Is there anything I am missing or I should do to make it work properly? I hope you can help me

Looking forward to hear from you

Kindly

Cristina Viola
Qinghua Ye, modified 2 Years ago.

RE: Morphology model

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Hi Cristina,

It is difficult for us to target the problem. You mentioned it is a coupled flow-wave simulation. There are problems with dry boundaries. But you showed the wave result from wave model. Are the flow results good? Or I misunderstood your question.

Greetings,

Qinghua
CV
cristina viola, modified 2 Years ago.

RE: Morphology model

Youngling Posts: 3 Join Date: 3/10/16 Recent Posts
Thank you Qinghua,

It seems that the flow results are ok. I have attached it below.
Please give some comments regarding it.
I have tried to modify the boundaries and the the bathymetry but still did not work. Can it be a problem with my Neumann boundary?

I am accepting suggestions.

Thank you for your attention.

Cristina Viola
CV
cristina viola, modified 2 Years ago.

RE: Morphology model

Youngling Posts: 3 Join Date: 3/10/16 Recent Posts
Dear Qinghua,

I have sent you the results of the flow model which I think are fine. Is there any comment you would like to make about it? Is there any procedure that I am missing?


Regards