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petronius

(26,700 posts)
3. And as the saturated clay layers subside, that's aquifer capacity that
Wed Jul 1, 2015, 04:23 PM
Jul 2015

is permanently lost (although I don't know how much groundwater storage clay contributes relative to sand and gravel; I think of clay as more of an aquitard than an aquifer ).

This older article from the Mercury News has a nice graphic and explanation...

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