UN scientists warn of increased groundwater demands due to climate change

Climate change has been studied extensively, but a new body of research guided by a San Francisco State University hydrologist looks beneath the surface of the phenomenon and finds that climate change will put particular strain on one of our most important natural resources: groundwater.

SF State Assistant Professor of Geosciences Jason Gurdak says that as precipitation becomes less frequent due to , lake and reservoir levels will drop and people will increasingly turn to for agricultural, industrial, and drinking water needs. The resource accounts for nearly half of all drinking water worldwide, but recharges at a much slower rate than aboveground and in many cases is nonrenewable.

"It is clear that groundwater will play a critical role in society's adaption to climate change," said Gurdak, who co-led a United Nations-sponsored group of scientists who are now urging policymakers to increase regulations and on nonrenewable groundwater.

The scientists recently released a book of their research, titled "Climate Change Effects on Groundwater Resources," that is the result of a global groundwater initiative by the United Nations Educational, Scientific, and Cultural Organization (UNESCO). They will soon make their case to international policymakers at the March 12-17 World Water Forum in Marseille, France.

The high-profile forum will allow the scientists for the first time to put the comprehensive groundwater findings before decision makers who have the power to enact regulatory changes. Gurdak will recommend closely monitoring or limiting groundwater pumping as well as renewing cooperation from communities to consume less water.

"In many ways, California is leading the way in developing solutions," he said. "Artificial recharge, managed storage and recovery projects and low impact development around the state will become more important for many local water systems to bank excess water in aquifers."

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Much irrigation water comes from non-sustainable sources

More information: "Climate Change Effects on Groundwater Resources: A Global Synthesis of Findings and Recommendations," was published in December 2011 by CRC Press. Selections from the book can be read here: userwww.sfsu.edu/~jgurdak/Publ … _tableofcontents.pdf
Citation: UN scientists warn of increased groundwater demands due to climate change (2012, March 5) retrieved 18 September 2019 from https://phys.org/news/2012-03-scientists-groundwater-demands-due-climate.html
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Mar 05, 2012
Is it a good time to start rethinking our technology on atmospheric re-condensation of water?

The demand for water, by us creatures who are "...mostly bags of water.." our recycle tech, will not be up to the task as we now have it!


Mar 05, 2012
I'm lost. Does climate change predict water levels will rise or that they will fall? Probably both, just like global warming is responsible for the unusual cold spells.

My logic teach taught me that if I can get a single statement proving something True is equal to something False, I could prove anything... well, that's how they prove that Climate change is responsible for everything.

Now its time to create a different science, actually once understood, where all the premises are based on true facts.

Mar 05, 2012
Less rain with global warming? Really? Then how does the positive feedback from increased water in the atmosphere happen? Global alarmists really ought to get their story straight. More water in the atmosphere but less rain. Want to buy some nice residential lots in the Everglades?

Mar 06, 2012
Anyone interested in this debate should check this out http://www.green-agenda.com/

Mar 06, 2012
Why should we trust UN scientists?

"We need to get some broad based support,
to capture the public's imagination...
So we have to offer up scary scenarios,
make simplified, dramatic statements
and make little mention of any doubts...
Each of us has to decide what the right balance
is between being effective and being honest."
- Prof. Stephen Schneider,
Stanford Professor of Climatology,
lead author of many IPCC reports

Mar 06, 2012
@ rubberman Whoever wrote this thinks an association with the UN somehow gives this report more credibility. I'm suggesting it gives it less, Much less. Through the corruption of the IPCC process climate science has become an oxymoron from which it will take years to recover. Is this report just more nonsense?

Mar 10, 2012
Many fail to recognize that any chemicals deposited in the atmosphere by chemtrails will eventually fall to the earth in rain. And there are many effects already being seen.
Recently, the phenomenon of spot die offs, one branch of a tree dying or one spot on a hedge or one in a row of trees or bushes dying, while the rest lives. The chemicals apparently need to be in concentration to kill, so only one in a group being affected seems reasonable, the rest apparently are only partly exposed.
Because the mechanical properties of the substance coming out of taps is different from water, "scientists" have to say it's an "old wives' tale" that water flowing down a drain in the Northern Hemisphere rotates counterclockwise.
And the phenomenon of unnaturally large gaps and holes in bread may be a combination of both effects of contaminated water and depraved air.

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