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The open boundary is described with a liquid boundary file but I get always unreal velocities. If someone could indicate the key-words I have to change in order to achieve more realistic velocities would be great!

Also, is there a way to impose U and V velocities variable in time to the open boundary, except from manipulating the bord.f?
If not, could someone help with the manipulation of this subroutine in order to read these velocities. Or is there any example, I could see?

Thanks

You open boundaries are too complicated to define with just a txt liquid boundaries file. Telemac3D can accept a binary liquid boundaries file that can vary in time and space, but normally you would extract that from an encompassing selafin file (using existing python scipts).
The simplest solution I can think of for your case is setting water elevations using tidal conditions (e.g. TPXO) and leave velocities free.
Costas

I followed your suggestions and I tried to set the water elevations using tidal conditions. But the simulation is stopped and I have no clue why. I attach the updated files of the simulation. I would be grateful for another hint about what is wrong.

Can post the error message?

Yes, this is it

Can you change the open boundary conditions from 466 (prescribed velocities) to 544 (prescribed level) and try again?

I tried it but I had the same error message..

I suspect an issue with the Coordinate system. In what projection/Coordinate system is your geometry file?

UTM WGS84 zone 35

A quick check, indicates that your coordinate system does not match UTM WGS84 zone 35, nor UTM WGS84 zone 34, which seems the most appropriate. However I doubt this is causing the trouble. Furthermore, Telemac2D (trunk version) does not accept UTM zones other than 30:Maybe a tide expert can provide some more insight.