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

which grid is suitable for this area

LZ
Lei Zhu, modified 5 Years ago.

which grid is suitable for this area

Youngling Posts: 10 Join Date: 3/19/14 Recent Posts
hi , i want to creat a grid in the following area, but i have no idea how to get a appropriate one.

In the first case (1# grid), i drew the splines along the coastal. The orthogonality of the grid is not good.

in the second one (2# grid), to improve the orthogonality i kept the intersectant splines perpendicular. then delete the spare grid.

i am not sure which one is better.

i will appreciate it if you guide me to generate a suitable grid,emoticon
Qinghua Ye, modified 5 Years ago.

RE: which grid is suitable for this area

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
dear Lei Zhu,

It depends on which area you are interested in. If you have more concerns on the left bank side, I would definitely vote for the first one. You can always adjust the orthogonality manually.

Enjoy,

Qinghua
LZ
Lei Zhu, modified 5 Years ago.

RE: which grid is suitable for this area

Youngling Posts: 10 Join Date: 3/19/14 Recent Posts
Thank you very much for your advice. I have another question.

Would the unsmooth grids on the left side result in difficulty in convergent computation or something else ?
Qinghua Ye, modified 5 Years ago.

RE: which grid is suitable for this area

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Dear Lei Zhu,

You might see some unrealistic flow pattern in the staggered grid area,even though you can remove it by cutting-cell technology but more effort is needed. It is not harmful for converging.

Regards,

Qinghua
LZ
Lei Zhu, modified 5 Years ago.

RE: which grid is suitable for this area

Youngling Posts: 10 Join Date: 3/19/14 Recent Posts
oh, I see.

How kind of you !