"Watershed News" will have the dual mission of reporting the work of our volunteers and keeping you informed of the issues concerning land and water in the Wimberley Valley. Together, we are all working to protect Jacob's Well and the waters that make this place so beautiful.
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:
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.
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
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