Featured Research

from universities, journals, and other organizations

Virtual water cannot remedy freshwater shortage

Date:
June 7, 2011
Source:
Institute of Physics
Summary:
The implementation of virtual water into trading deals has been suggested as a realistic solution to solving the global inequality of renewable freshwater, but new research suggests that it may not be as revolutionary as first thought.

The implementation of virtual water into trading deals has been suggested as a realistic solution to solving the global inequality of renewable freshwater, but new research suggests that it may not be as revolutionary as first thought.

In a study published June 7, in IOP Publishing's journal Environmental Research Letters, researchers have claimed that virtual water is unlikely to increase water use equality, primarily because the existing amount of virtual water is not large enough to overcome the inequalities that exist.

Lead author David Seekell, of the University of Virginia, said, "Virtual water is unlikely to overcome these constraints because there just isn't enough to go around."

80 per cent of humanity currently lives in regions where water security is threatened, meaning that as the global population grows against a finite volume of freshwater, a more equal distribution of water use between countries will be needed.

Virtual water -- the amount of water it takes to produce goods or a service -- has been suggested as a possible solution to this growing problem by using virtual water values to inform international trade deals.

Most goods carry a virtual water value -- for example, producing one kilogram of beef requires 15 thousand litres of water -- which can act as a significant tool for addressing a country's input and output of water.

For example, a trade deal could be struck where products with a high virtual water value, such as oranges, could be exported from countries where there is an efficient and abundant water supply, into a country where the requirement of water to grow that particular product is more of a burden.

This would allow the receiving country to save on water, relieving the pressure on their limited water resources, and allowing the water to be used elsewhere in its infrastructure.

This study, performed by researchers at the University of Virginia, assessed the inequality in water use between countries and examined how different uses, such as industrial, household, and for agricultural products consumed domestically, contributed to the overall inequality.

To do this, the authors compared United Nations statistics on both social and human development statuses with water usage statistics for a range of countries.

Their study concludes that virtual water transfers are not sufficient to equalise water use among nations because water used for agriculture consumed domestically dominates a nation's water needs and cannot be completely compensated by current volumes of virtual water transfers.

Seekell continued, "Even if it cannot completely equalise water use between countries, virtual water may stand to contribute to this effort if there is increased transfer from high water use to low water use countries, but the danger here is that these transfers effectively prop up populations above the carrying capacity of their natural resources and this could actually erode a population's long-term resilience to drought or other disasters.

"There are a myriad of political and economic barriers to trade, and because water is not usually a deciding factor in trade decisions, it is unlikely that global trade will ever be viewed as efficient from a water use point of view."


Story Source:

The above story is based on materials provided by Institute of Physics. Note: Materials may be edited for content and length.


Journal Reference:

  1. Seekell et al. Virtual water transfers unlikely to redress inequality in global water use. Environmental Research Letters, 2011; 6: 024017 [link]

Cite This Page:

Institute of Physics. "Virtual water cannot remedy freshwater shortage." ScienceDaily. ScienceDaily, 7 June 2011. <www.sciencedaily.com/releases/2011/06/110606203950.htm>.
Institute of Physics. (2011, June 7). Virtual water cannot remedy freshwater shortage. ScienceDaily. Retrieved August 30, 2014 from www.sciencedaily.com/releases/2011/06/110606203950.htm
Institute of Physics. "Virtual water cannot remedy freshwater shortage." ScienceDaily. www.sciencedaily.com/releases/2011/06/110606203950.htm (accessed August 30, 2014).

Share This




More Matter & Energy News

Saturday, August 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Australian Airlines Relax Phone Ban Too

Australian Airlines Relax Phone Ban Too

Reuters - Business Video Online (Aug. 26, 2014) Qantas and Virgin say passengers can use their smartphones and tablets throughout flights after a regulator relaxed a ban on electronic devices during take-off and landing. As Hayley Platt reports the move comes as the two domestic rivals are expected to post annual net losses later this week. Video provided by Reuters
Powered by NewsLook.com
Hurricane Marie Brings Big Waves to California Coast

Hurricane Marie Brings Big Waves to California Coast

Reuters - US Online Video (Aug. 26, 2014) Huge waves generated by Hurricane Marie hit the Southern California coast. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Chinese Researchers Might Be Creating Supersonic Submarine

Chinese Researchers Might Be Creating Supersonic Submarine

Newsy (Aug. 26, 2014) Chinese researchers have expanded on Cold War-era tech and are closer to building a submarine that could reach the speed of sound. Video provided by Newsy
Powered by NewsLook.com
Breakingviews: India Coal Strained by Supreme Court Ruling

Breakingviews: India Coal Strained by Supreme Court Ruling

Reuters - Business Video Online (Aug. 26, 2014) An acute coal shortage is likely to be aggravated as India's supreme court declared government coal allocations illegal, says Breakingviews' Peter Thal Larsen. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins