open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello,

During the past couple of months i've been testing how Telemac2d performs over some steady/unsteady cases with acceptable results (some mesh refinement and several tweaks still needed), but my interest lies in the sediment transport phenomena, more specifically in meander evolution.

Our (final) model should be able to represent how the landscape changes over specific areas along a 180 km river due to a continuous operation of an hydroelectric plant during 5,10..25 years.

I tried to run the examples in the Sisyphe folder,but i wasn't able to find any test case that guided me in some way, and found nothing else on the site related to sisyphe (¿is there no public validation document like telemac?).

After a very first approach to the Sisyphe manual, the keyword "MORPHOLOGICAL FACTOR" caught my attention, but i really don't know how to use it and if its effects on the model are what i need.

My initial doubts are:

1)¿Is there any tutorial/example case that relates to meander evolution over a long-time period using a T2d-Sisyphe coupled model?

2) What are the recommended configs. (solver, variable or fixed time step, specific keywords...) that i should consider to include in the telemac2d and Sisyphe CAS files?

Thank you for your time and your hard work,

José C. Díaz.

Dear José,
Thanks for you post.
Your problem looks very interesting providing the time and spatial scales involved.
The cases that you can found in the "examples" directory of Sisyphe are in general simple applications of the model that can help you and guide with the choice of keywords, etc. As starting point, you can take a look to epi-en-riviere, River-arc or Yen.

Regarding the effect of morphological factor, some articles have been written on the topic over the time. Lesser et al. (2004) and Roelvink (2006) have introduced this powerful concept to coastal morphodynamic modeling. This technique is also applied to fluvial applications.

Please take a look to :
eprints.hrwallingford.co.uk/590/1/HRPP54...eleration_factor.pdf

and references therein.

As meandering modelling is an active topic in our group, I'd like to discuss a bit more in detail with you about your application. Please send me your email to This email address is being protected from spambots. You need JavaScript enabled to view it. I'll contact you soon.

Best wishes,

Pablo

Dear Pablo,

I'm glad this is an interesting topic for the development team! I'll send you my contact info.

Regards,

José.