Hello,
Sorry for the late reply.
Of course we can. Since you have the whole of the source code you can do whatever you like actually. Also, because TELEMAC runs quicker than real time, you can a short term or long term forecast every hour if you wish, while updating your inputs
However, if you mean to include data assimilation, then we are (I would say) only 1 or 2 years away from producing a released version.
Hope this helps.
Sébastien.