Mathieu Hellegouarch

Hi,

I looked at your model, and I could see that you actually do have some issues with your structures' geometry: at least for one of them, the bottom level is lower than the thalweg of the upstream cross-section. So you should edit these structures in order to improve your model.

I've also seen that you have cross-sections really close to each others (grid step of approx. 1m): in such cases, you should consider reducing the time step. In some cases, a time step smaller than 1s may be required.

Please also remember that the Delta parameter (HD11 file \ Default values tab) can be slightly increased : it often significantly improves stability on structures.

Regards,
Mathieu