One explanation that I found was rainfall but it is not apparent that rainfall could contribute to such volume of water.
In: Geology
Has to be rainfall.
It’s all about gravity and the path of least resistance. The rainfall dribbles down through porous layers until it gets to a less porous layer. It then pools up on the less porous layers and follows the path of least resistance to where the layer emerges from underground and… voila! A spring.
If it truly is at the top of a hill then there HAS to be a higher hill that is feeding it, cuz…. gravity.
This information on artesian aquifers shows the concept nicely.
https://en.m.wikipedia.org/wiki/Artesian_aquifer
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