HOME >> BIOLOGY >> NEWS
Sahara's edge studied from ground, air and space to improve water management

An international team worked on the verge of the Sahara to gather data on the ground and in the air, to be compared with imagery of the same region acquired by ESA satellites. The results will be used in support of an ambitious project to apply satellite remote sensing to improve monitoring and management of vast water aquifers concealed beneath the desert.

High-resolution radar as well as hyperspectral optical imagery was acquired during flights across two test areas in southern Tunisia. Meanwhile ground teams precisely documented ground vegetation and terrain at sampling sites within these test areas, with samples taken to local laboratories for detailed analysis. And ESA's Envisat, ERS-2 and Proba satellites acquired images of these sites around the same time. The aim was to scale up the findings from the ground, and at the same time to use this 'ground truth' to calibrate satellite imagery with reality on the sandy arid ground as well as seeing what can be learnt about the water beneath it.

The Sahara has altered through the ages: during the last Ice Age, 10 000 years ago, there was savannah here with rivers, lakes and plentiful rains. That landscape has vanished now, but the rains from that period progressively percolated beneath the ground to be collected in layers of water-bearing rock known as aquifers.

This 'fossil water' is today used in North African nations for irrigating agriculture and to support population growth. It is a valuable resource but also a non-renewable one - distributed across national boundaries - which requires careful management to be employed in a sustainable way. Over-exploitation risks exhaustion of groundwater, plus loss of artesian pressure to put remaining supplies out of reach or induce contamination from nearby saline water deposits.

Working with partners including African water agencies, ESA has commenced a project called Aquifer to develop satellite-derived products and services to suppo
'"/>

Contact: Mariangela D'Acunto
mariangela.dacunto@esa.int
39-069-418-0856
European Space Agency
19-Dec-2005


Page: 1 2 3 4 5

Related biology news :

1. Bacterial response to oxidation studied as toxin barometer
2. Ground spider diversity studied in research project
3. Fat stem cells being studied as option for breast reconstruction
4. Area creek studied for rangeland effects on water quality
5. Links between DNA damage and breast cancer studied
6. Inflammation and drugs to control this activity studied in a variety of tumors sites
7. Atherosclerosis studied at the cellular level
8. OT, VP studied as novel psychiatric drug sources; consider gender-specific drug models
9. Novel biotoxin being studied for use in opioid withdrawal
10. Insecticide resistance in mosquitoes being studied
11. MIT: Recycling of scrapped electronics studied

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/2/2016)... --Technology Enhancements Accelerate Growth of X-ray Imaging This ... computed radiography markets in Thailand , ... (TIM). It provides an in-depth analysis of ... regional market drivers and restraints. The study offers revenue ... attractiveness, both for digital and computed radiography. Market participants ...
(Date:2/1/2016)... 1, 2016  Wocket® smart wallet ( www.wocketwallet.com ) announces the launch ... Joey Fatone . Las Vegas , where Joey ... --> Las Vegas , where Joey appeared at the ... new video ad was filmed at the Consumer Electronics Show (CES2016) in ... booth to meet and greet fans. --> ...
(Date:1/22/2016)... , January 22, 2016 ... the addition of the  "Global Behavioral ... offering. --> http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) ... "Global Behavioral Biometric Market 2016-2020"  report ... Research and Markets ( http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has ...
Breaking Biology News(10 mins):
(Date:2/8/2016)... 8, 2016  BioElectronics Corporation (OTC Pink: BIEL), ... today that it is responding to a notice ... Securities and Exchange Commission posted on the agency ... of the Board of BioElectronics Corporation and the ... at The Fuqua School of Business, Duke University.   ...
(Date:2/8/2016)... ... February 08, 2016 , ... ... of loose, bulk foods at various stages of the production process. Despite frequently ... inspect large bulk products post packaging such as sacks of dry powders. , ...
(Date:2/8/2016)... 8, 2016  NanoViricides, Inc. (NYSE MKT: NNVC) (the "Company"), a ... Seymour , MD, MPH, will present information about the company,s programs ... in New York City . ... Windsor Room at 5:30PM EST. Registered attendees can request a one ... City . --> New York City ...
(Date:2/8/2016)... (NYSE: DPLO) announced today that its new website has gone live. On Thursday, Feb. 4, the ... Visit the new site: www.diplomat.is ... ... ... "The goal was to reimagine the website and create a smarter, more ...
Breaking Biology Technology:
Cached News: