due to extraction, ground water has cause extreme sinking of land. Does raining ever raise it? Even if we stop extracting?
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Not really. Most of the aquifers being pumped are hundreds of feet below the surface, so a raindrop is going to take a very long time to get there. Some aquifers are even protected by a layer of shale or clay that stops surface water.
One of the biggest problems though with the extreme over pumping in some places is that the pores in the aquifer that were full of water have collapsed, and there’s no space left for new water. That collapsing is responsible for the ground failures, and there’s no going back. Of course the areas that are over pumping this much don’t have much surface water anyway, and wouldn’t have enough to recharge the aquifer in any case.
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