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

Dpart - (particle tracking) using telemac data?

U
John Floyd, modified 4 Years ago.

Dpart - (particle tracking) using telemac data?

Hello,

I have tried to read in the hyd file and associated files created from telemac. This works with dwater quality as expected.

It does not work with dpart - I get a read error on opening the hyd file.

Is l dpart supposed to work with this input?

regards
MJ
Michel Jeuken, modified 4 Years ago.

RE: Dpart - (particle tracking) using telemac data?

Jedi Knight Posts: 154 Join Date: 1/21/13 Recent Posts
Hi,

D Particle Tracking only works on sigma layered curvilinear grids as provided by Delft3D FLOW or SIMONA. TELEMAC grids do not comply to this. We are investigating how to get PART running on our Delft3D Flexible Mesh output, but there is no planned release for that at the moment.

regards,
Michel
U
John Floyd, modified 4 Years ago.

RE: Dpart - (particle tracking) using telemac data?

Ah disappointing, so really it is a separate component not really part of dwater system.

I had assumed that it used the same generic gridding system - which is what makes delwaq a very interesting system and multi use system. But thinking about it - delwaq really does not know how things relate in an xy fashion, just what goes in and out and where it goes to (in terms of cell ids). Xyz vectors dont enter into it - that is taken care of by reducing it to fluxes between cells.

Thanks for the quick response.
MJ
Michel Jeuken, modified 4 Years ago.

RE: Dpart - (particle tracking) using telemac data?

Jedi Knight Posts: 154 Join Date: 1/21/13 Recent Posts
Yes, Delwaq does not need to know any coordinates, which makes it less depended on the way hydrodynamic grids are defined.

As for PART, well it was (and still is) connected to the old structured Delft3D FLOW since the 1990s, and as such labelled as part of the Delft3D suite. However, it did not keep up with the newer Flexible Mesh approach and grid definitions.

The methodology is described in this article (http://onlinelibrary.wiley.com/doi/10.1002/fld.3705/abstract sorry, no open access), which is in short based in relative x and y coordinates (scaled 0.0-1.0), which is only valid in curved rectangular grid cells. Even when PART would be able to read the new grid definition from FM, then still we have to develop a new solver method to deal with triangular grids.