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Hello,
When I am caculating the open channel sedimention(coupling telemac 3d with sisyphe), the phenomenon of excesive erosion and deposition in tidal flats always happens. More than 20 meters. Without coupling with sisyphe, it goes well. I have modified the parameters of tidal flats following the tutorial but it does not help.

Has anyone ever had a similar problem? How did you solve it? I have seen similar problems in the forums, but everyone seems to have no good solution. Thanks!

Kind Regards
Wang Shan