Calif. Central Valley Sank 3 Feet During Historic Drought

By Matthew Renda : courthousenews – excerpt

PALO ALTO, Calif. (CN) – While this past winter busted California’s five-year drought, a new Stanford University study shows how the dry years did permanent damage to Central Valley aquifers.

A satellite remote-sensing study performed by Stanford researchers shows a portion of the Central Valley sank by as much as three feet due to overpumping of groundwater during the drought, permanently reducing the region’s capacity for water storage.

“California is getting all of this rain, but in the Central Valley, there has been a loss of space to store it,” said study co-author Rosemary Knight, a professor at Stanford’s School of Earth, Energy and Environmental Sciences.

The alteration of the clay layers that comprise the San Joaquin Valley translates into a permanent loss of natural storage capacity of anywhere between 360,000 to 600,000 acre-feet of water, the study says.

As a point of comparison, the Hetch Hetchy Reservoir – which provides water to San Francisco and is roughly the size of the Yosemite Valley – holds about 360,000 acre-feet of water… (more)

Next time you hear about rising sea levels remember that land can also sink. the effect is the same. San Francisco is embarking on a plan to blend groundwater with Heth Hetchy water for half the city’s water customers. EIRs do not seem to study the effects of removing ground water or much else that effects the environment and as we know there is no real mitigation done to protect one from any of the negative results anyway.

 

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