Wednesday, August 27, 2014

Ongoing drought-induced uplift in the western United States, Water loss of 63 trillion gallons causing western U.S. ground to rise



(Photo : Shawn Lawrence, UNAVCO)

Our aquifers will be our water of last resort after the reservoirs go dry…..of course there is always treated excrement.
Water loss of 63 trillion gallons causing western U.S. ground to rise:
Scripps study, Ongoing drought-induced uplift in the western United States, was supported by the U.S. Geological Survey.  Authors: Adrian Antal Borsa, Duncan Carr Agnew, Daniel R. Cayan.
The western United States has been experiencing severe drought since 2013. The solid earth response to the accompanying loss of surface and near-surface water mass should be a broad region of uplift. We use seasonally-adjusted time series from continuously operating GPS stations to measure this uplift, which we invert to estimate mass loss. The median uplift is 4 mm, with values up to 15 mm in California’s mountains. The associated pattern of mass loss, which ranges up to 50 cm of water equivalent, is consistent with observed decreases in precipitation and streamflow. We estimate the total deficit to be about 240 Gt, equivalent to a 10 cm layer of water over the entire region, or the annual mass loss from the Greenland Ice Sheet.
Satellite study reveals parched U.S. West using up underground water
24 July 2014, American Geophysical Union
WASHINGTON, D.C. — A new study finds more than 75 percent of the water loss in the drought-stricken Colorado River Basin since late 2004 came from underground resources. The extent of groundwater loss may pose a greater threat to the water supply of the western United States than previously thought.
If You Think the Water Crisis Can't Get Worse, Wait Until the Aquifers Are Drained
We're pumping irreplaceable groundwater to counter the drought. When it's gone, the real crisis begins.

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