open TELEMAC-MASCARET The mathematically superior suite of solvers

Dear Christophe, dear devs,

I plan to create dikes using WEIRS=2 in a model and I will have to breach these dikes.
Is it possible to describe all params in WEIR DATA FILE in human words ?

I notice the comment
Is it possible to breach them ?
WEIR_BREACH_START and WEIR_BREACH_END are allocated but never used.

Kind regards,

Hi Nicolas
Not so simple to describe the parameters in simple human words...
Consider a weir as a list of N segment, each segment represent the line between 2 points A and B.
The points are described by their 3D coordinates (Xa, Ya, Za) and (Xb, Yb, Zb)
On the other side, you have your mesh which is separate by the weir. So there us 2 sides (1 and 2) for each side of the weir.
Then for each node, we define the 2 nearest nodes on each side.
For point A on side 1 you will have N1a and N1'a
For point A on side 2 you will have N2a and N2'a
For point B on side 1 you will have N1b and N1'b
For point B on side 2 you will have N2b and N2'b
Note that nodes on each sides could be the same, the algorithm will work.
2 integers and 2 reals have been added to allow the users to manually adapt the computation with local indicator quite easily as the parallelism required some specific management of the description and then it's quite impossible for user to change the description of the weirs description
The following parameter listed in the description (atyp, axoriginalpoint, ayoriginalpoint, btyp, bxoriginalpoint, byoriginalpoint) are useless.
I advise you to have a look at the weirs example (and the weirs2.txt file).
As the example is quite limited in term of nodes, the description of the file is quite easy to understand

About the capability to breach the weirs, this is possible but should be manually coded. Artelia make some test on this but the breaching conditions are complex to generalize. The weir_breach_start and weir_breach_end allocated are a residual of these tests...

Hope this helps