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

 

 

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Grid create Delft3D-Flow

LB
Le Vu Bao, modified 2 Years ago.

Grid create Delft3D-Flow

Youngling Posts: 12 Join Date: 1/15/18 Recent Posts

I have a question about the grid creation for Delft3D- FLOW.

Will the computational result be different if I create an exactly square grids?. By choosing the option: Create rectangular grid (RGFGRID) and then trim the grid by deleting spare grid cells. (See attachments please). By doing this, my grid cannot fit exactly to river boundary like one created with Spline. But my area have flooding area so i think that my grid must be bigger than the river it selft to simulate the flooding. Aslo, by create exactly rectangular i can control the Orthogonality, resolution, smoothness and aspect ratio very well. So i dont know will this way be stable when running? or what is it disadvantages?

Thank you.