Hi everybody, :)
I have some questions about wells. I have a hypothetical unconfined aquifer and I’m trying to determine its response in several pumping scenarios. I have placed a well at the 2nd layer and I noticed that when the pumping rate increased enough (e.g. 500m3/d) some oscillations in hydraulic and some convergence problems occurred. So, my questions are these:
1. Are there any rules to choose the “best” from a numerical point of view layer for pumping? Should I use certain parameter values at the well location to avoid numerical problems?
2. Is it right to place the well at the top slice and use a free and movable surface? If I understood that correctly the BC in this case would follow the free surface up and down movement and the top layer would not fall dry.
Thank you very much for your help,
George