Drought

Figure 1: Trends in TWS (in centimetres per year) obtained on the basis of GRACE observations from April 2002 to March 2016. The cause of the trend in each outlined study region is briefly explained and colour-coded by category. The trend map was smoothed with a 150-km-radius Gaussian filter for the purpose of visualization; however, all calculations were performed at the native 3° resolution of the data product.

CLICK HERE - STUDY - Emerging trends in global freshwater availability

trend.pewtrusts.org - by Jay Famiglietti - March 13, 2019

Global changes are altering where and how we get fresh water, sparking the need for worldwide cooperation.

The availability of fresh water is rapidly changing all over the world, creating a tenuous future that requires attention from policymakers and the public . . .

Note: Maps depict drought conditions during the final week of every month. January's map is current as of Jan. 16. - Source: United States Drought Monitor - Credit: Annie Daniel

Just five months after the monster storm gave Texas its wettest month in history, much of the state is now in a drought — including areas that saw historic flooding.

texastribune.org - by Paul Cobler - January 24, 2018

 . . . More than 40 percent of Texas is now in a moderate to severe drought, according to the latest data from the U.S. Drought Monitor. That's compared to 4 percent on Aug. 29, a few days after Harvey slammed into the South Texas coast.

And dry conditions are expected to worsen over the coming months.

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CLICK HERE - United States Drought Monitor

Vegetation grows between boat docks at the now defunct Echo Bay Marina in the Lake Mead National Recreation Area, Thursday, May 19, 2016, near Las Vegas. Lake Mead's surface was at its lowest level Wednesday since the reservoir was created.
(AP Photo/John Locher)

Lake Mead's drop to an all-time low is another sign that solutions to the West's prolonged drought may involve creative approaches to water allocation and conservation.

csmonitor.com - by Lucy Schouten - May 21, 2016

Extended droughts has shrunk the country's largest reservoir to an all-time low, and leaders in the West's water planning say the area's water users must shift how they view their most valuable resource.

“California and the rest of the West are now at a point where they really can’t dismiss ideas that once would have been considered downright silly,” Rich Golb, former president of the Northern California Water Association, and now a Vancouver-based water consultant for PacificComm, LLC, told The Christian Science Monitor. 

Lake Mead, hemmed in by the Hoover Dam, is the largest manmade reservoir in the United States and supplies water to California, Nevada, and Arizona, according to the Bureau of Reclamation.

sciencedaily.com - March 5, 2015

Source:  Texas A&M University

CLICK HERE - STUDY - Changing global patterns of urban exposure to flood and drought hazards

Summary:  A heads-up to New York, Baltimore, Houston and Miami: a new study suggests that these metropolitan areas and others will increase their exposure to floods even in the absence of climate change.  Their work is published in Global Environmental Change. . . .

. . . "Through land change, bank protection, channelization, and other means, urbanization can also alter the geomorphology of river channels and floodplains, which in turn may contribute to increased risk of flooding."

"Our findings suggest that future urban expansion in flood and drought prone zones will at least be as important as population growth and economic development in increasing their exposure," the researchers add.

"With climatic changes, this exposure is only expected to increase in the future. Thus, proper planning and financing in fast growing cities today will be critical in mitigating future losses due to floods and droughts."

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