Underground storage might make sense in places where the aquifers are empty, but what about wetter areas like Northern California?
Underground storage is just one solution among many. We should use it where it makes most sense. In areas like the Sacramento Valley, where the water table already is high, it honestly doesn’t make sense. Indeed, water agencies sometimes practice “conjunctive” water management. They would in essence turn the aquifer into a wildly fluctuating underground reservoir. That would create an entire set of obvious environmental problems.
