large-scale calibration of the CWatM model

[hydrolo]

Dear CWatM team,

I hope this message finds you well. I have been exploring the use of CWatM for large-scale hydrological applications, and I have two questions that I would greatly appreciate your guidance on:

When simulating runoff at the global scale, how should the calibration of the CWatM model be carried out in practice?

Is it possible to calibrate the model across multiple basins simultaneously, or even perform a kind of multi-site joint calibration within the current framework?

Thank you very much for your time and for making this model available to the community. Any advice or suggestions from your side would be extremely helpful.

Best regards,