[GRASS-user] Animated water flow simulation

[Emma]

Dear all,

Given a DEM, I would like to simulate the flow of raining water (and  
possibly the resulting erosion) over time, and for this it would be  
great to create an animation showing this evolution. I found a few  
examples of such movies using GRASS data online, but no explanation or  
tutorial on the best way to actually do it. Could you please just  
kindly tell me how I should proceed to achieve this?

Thank you very much for your help!

Sincerely yours,
Emma