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if groundwater lowering categorically caused a lower capacity for water that was impossible to reverse in every case, the earth would not have any aquifers at a
by krageon 3y ago
if groundwater lowering categorically caused a lower capacity for water that was impossible to reverse in every case, the earth would not have any aquifers at all. We can see this is untrue. It's therefore not likely there's no nuance.
- tw04 3y agoHistorically, who was draining those aquifers? It seems that pumping large amounts of water out of the earth is a relatively new thing. On planet timescales anyway.
- sidewndr46 3y agoHistorically artesian wells, possibly during earthquakes as well you'd see water leaving an aquifer. The volume on the other hand seems totally inconsistent with what we pump on a daily basis from something like the Ogallala
- b112 3y agoI absolutely do not know the process for aquifer formation, however: * the ice age left immense amounts of water behind, including hidden under ground ice bergs that took thousands of years to thaw * if you had a lake in a place, that sort of saturation would lead to an aquifer I think. Then the lake disappears, but the saturated ground remains, hidden from the air and sun, until drained
- heavenlyblue 3y ago> including hidden under ground ice bergs that took thousands of years to thaw Citation needed?
- dgfitz 3y ago[dead]
- spywaregorilla 3y agoI think they just mean glaciers
- sidewndr46 3y agoYeah I have no idea what they are referencing either. Ice sheets are called as such because they sit on top of the continents. Apparently North America was actually compressed downwards by the last sheet and is still basically rising back up. Maybe they are thinking of permafrost or something? I'm not sure how deep that gets at the Northern reaches like Svalbard. But most of the land on earth is not permafrost for a long time now.