Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
. Earth Science News .




WATER WORLD
Improving water security with blue, green, and gray water
by Staff Writers
Washington DC (SPX) Oct 09, 2013


File image.

Agriculture is one of the most insatiable consumers of dwindling water resources around the world. And food production will need to increase by about 70% over the next 35 years to meet the needs of a growing population. Crops aren't creating the only demands; agriculture will face competition for water from cities, industries, and recreation.

With limited water and the increasing number of people depending on it, water security is tenuous. But integrated water management plans using "blue," "green," and "gray" water can increase water security. What do these colors mean and why are these waters vital?

Blue water is found in lakes, rivers, reservoirs, or aquifers. It is used for many purposes such as drinking water, water for homes and businesses, and irrigation water for agriculture. Freshwater stores are limited, and what's left of blue water must be protected and used sparingly.

Green water is the water available in the soil for plants and soil microorganisms. It can be absorbed by roots, used by the plants to grow, and released back to the atmosphere. The use of green water by crops must be optimized to better utilize this often overlooked resource.

Gray water is water that has been previously used and may contain some impurities. It can come from cities, households, or industries, and it is waste water that is usually treated and discharged. The reuse of gray water for agriculture can decrease the amount of blue water withdrawn from stores and increase the green water available for plants to use.

These three water sources -- blue, gray, and green -- have to be protected and optimized if agriculture is to rise to the challenge of feeding over 9 billion people by 2050 while leaving enough water for other uses. After all, says Rattan Lal, presider of the symposium, "There is no substitute for water."

.


Related Links
American Society of Agronomy
Water News - Science, Technology and Politics






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





WATER WORLD
UN chief Ban says world must tackle water waste
Budapest (AFP) Oct 08, 2013
The world needs to combat water waste, United Nations chief Ban Ki-Moon said Tuesday as he warned of growing water scarcity in years to come. Speaking at the opening of a four-day Budapest Water Summit, Ban said nearly half the global population could be facing water scarcity by 2030, while demand could outstrip supply by 40 percent. "We must address unsustainable use... Water is wasted ... read more


WATER WORLD
Smart smoke alarm can speak, warn of smoke, carbon monoxide

European satellites included in test of search-and-rescue system

Indonesia to boost patrols against people smugglers

'Ship in a bottle' detects dangerous vapors

WATER WORLD
Ultrasound system gives virtual feeling of objects in mid-air

Himawari and Mitsubishi Electric Complete Facilities For Weather Satellite Ops

Disney Research develops algorithm for rendering 3-D tactile features on touch surfaces

World's Largest Solar Sail, Sunjammer, Completes Test

WATER WORLD
Improving water security with blue, green, and gray water

Plastic waste is a hazard for subalpine lakes too

Japan asks WTO to intervene on S.Korean atomic fish ban

UN chief Ban says world must tackle water waste

WATER WORLD
Giant channels discovered beneath Antarctic ice shelf

Government shutdown threatens U.S. antarctic research

Arctic shipping route may take 20 years, Maersk CEO: FT

Russia to charge Greenpeace activists with piracy: report

WATER WORLD
Bt sweet corn can reduce insecticide use

Early spring warming has greatest effect on breaking bud

NMSU and NMDA work together to boost organic farming

Scientists unlock secret of cattle ticks' resistance to pesticide

WATER WORLD
How one Transportation Business Survived Hurricane Sandy

Typhoon Fitow kills 10 in east China province

11 dead as rains lash central, southern Philippines

U.S. seismologist calls for national warning system for earthquakes

WATER WORLD
Islamists step up attacks in north Mali

Ethiopia says no plans to withdraw troops from Somalia

'Armed bandits' kill Niger soldier, wound three others in Nigeria: official

Nigeria bombs Boko Haram 'camp' near site of massacre

WATER WORLD
Council of Europe attacks genetic procedure

Ancient sagas show Vikings more social, less warlike

Einstein's genius put down to 'well-connected' brain halves

Roma families face wholesale expulsion from France




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement