Featured Research

from universities, journals, and other organizations

Improving water security with blue, green, and gray water

Date:
October 3, 2013
Source:
American Society of Agronomy
Summary:
With limited water and an 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.

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.

Related Articles


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?

Those are the central questions behind the symposium "Blue Waves, Green Dreams, and Shades of Gray: Perspectives On Water" being held Nov. 5. The symposium is part of the American Society of Agronomy, Crop Science Society of America, and the Soil Science Society of America Annual Meetings, Nov. 3-6 in Tampa, Florida.

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 The reuse of gray water for agriculture can decrease the amount of blue water withdrawn from stores and increase the green water available for plants to use.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."


Story Source:

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


Cite This Page:

American Society of Agronomy. "Improving water security with blue, green, and gray water." ScienceDaily. ScienceDaily, 3 October 2013. <www.sciencedaily.com/releases/2013/10/131003111119.htm>.
American Society of Agronomy. (2013, October 3). Improving water security with blue, green, and gray water. ScienceDaily. Retrieved April 2, 2015 from www.sciencedaily.com/releases/2013/10/131003111119.htm
American Society of Agronomy. "Improving water security with blue, green, and gray water." ScienceDaily. www.sciencedaily.com/releases/2013/10/131003111119.htm (accessed April 2, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Thursday, April 2, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Voice-Controlled GPS Helmet to Help Bikers

Voice-Controlled GPS Helmet to Help Bikers

Reuters - Innovations Video Online (Apr. 1, 2015) — Motorcyclists will no longer have to rely on maps or GPS systems, both of which require riders to take their eyes off the road, once a new Russian smart helmet goes on sale this summer. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
Kashmir Mops Up After Heavy Flooding

Kashmir Mops Up After Heavy Flooding

AFP (Apr. 1, 2015) — The clean-up operation is in full swing in Indian Kashmir after heavy rain triggered flooding around the mountainous region. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
California Unveils Historic Water Restrictions Over Drought

California Unveils Historic Water Restrictions Over Drought

AFP (Apr. 1, 2015) — California announced sweeping state-wide water restrictions for the first time in history Wednesday in order to combat the region&apos;s devastating drought, the worst since records began. Duration: 00:36 Video provided by AFP
Powered by NewsLook.com
Space Station Captures Images of Massive Typhoon

Space Station Captures Images of Massive Typhoon

Reuters - News Video Online (Apr. 1, 2015) — Images from the International Space Station show a massive typhoon forming as the Philippines warns residents to be ready for super typhoon "Maysak." Display (no reporter narration). 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:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

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