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

RE: Obtaining data to compute the Briers Skill Score (BSS)

GL
Gabriel Lim, modified 13 Days ago.

Obtaining data to compute the Briers Skill Score (BSS)

Padawan Posts: 37 Join Date: 5/5/18 Recent Posts
Hello,

I am relatively new to morphodynamic modelling, and I would like to compute the Briers Skill Score (BSS) as a measure of the performance of my model (measured vs computed). Can anyone give me some guidance as to how I can do this? I understand the concept of the BSS, and the formula for finding it. The part I am struggling with is getting the bed changes values that I need to compute the BSS.
i.e. do I need to set up monitoring points throughout the grid in order to do this? Or is there a method of extracting the bed level values for the whole grid and comparing them against the measured bed levels, e.g. in an excel spreadsheet?

If anyone has any experience calculating the BSS (or RMS error) or something similar, I would greatly appreciate it if you could share your experiences!

Many thanks,

Gabriel
GR
Gabriel Ruiz, modified 12 Days ago.

RE: Obtaining data to compute the Briers Skill Score (BSS)

Youngling Posts: 3 Join Date: 4/28/11 Recent Posts
Hi Gabriel,
Prof. Van Rijn has a paper about cross-shore evolution; on this paper, you can find how he used the BSS.
https://www.leovanrijn-sediment.com/papers/P6-2003.pdf
Regards.
Gar.
GL
Gabriel Lim, modified 12 Days ago.

RE: Obtaining data to compute the Briers Skill Score (BSS)

Padawan Posts: 37 Join Date: 5/5/18 Recent Posts
Hello Gabriel,

Thank you for your reply and for sharing the paper! I will be sure to give it a read! Your help is much appreciated.

Kind regards,

Gabriel