Featured Research

from universities, journals, and other organizations

Envisat Tracking Africa's Rivers And Lakes To Help Manage Water Resources

Date:
October 16, 2005
Source:
European Space Agency
Summary:
From this week, researchers worldwide can follow the flow of rivers and height of lakes across the African continent from the comfort of their desks. A new web-based demonstration launched to coincide with this week's TIGER Workshop makes Envisat-derived altimetry data for African inland water freely available in near-real time.

MERIS mosaic of Africa - May 2004.
Credit: Image courtesy of European Space Agency

The effort to develop the River andLake product was led by Professor Philippa Berry of DMU's Earth andPlanetary Remote Sensing Laboratory: "Monitoring of water resources isvital over Africa, to enable best use of this precious commodity. Untilnow reliable information has been difficult to access because of thehigh cost in equipment, manpower and communications, and because it isdifficult to obtain these precious hydrological data from manycountries.
"However heights of inland water can now be measureddirectly from space using radar altimeters, currently carried onseveral satellites and originally designed to measure ocean height.This is a very exciting development which has the potential totransform the management of drought crises and water-related conflictaround the world.

"Whilst data from a few selected large lakeshas been available previously, the combination of DMU's sophisticatedprocessing scheme and the unique design of the Envisat altimeter havefor the first time allowed near-real time measurements to be made overlakes and major rivers across Africa.
"The new system identifiedthat part of each surface echo originating from inland water, enablingmeasurement of much smaller targets than has previously been possible.This, combined with the altimeter's capability to return good data evenin rough terrain, means that we can provide much more accurate andup-to-date water level information than has ever been possible before."

Thedemonstration website is being launched at this week's ESA TIGERWorkshop at ESRIN, the European Centre for Earth Observation inFrascati in Rome. Starting 3 October, this four-day event involves morethan 200 African organisations from 31 countries, and aims to applyEarth Observation technologies in support of integrated water resourcemanagement.

"The information will be released using a web-baseddelivery service hosted at ESRIN," Berry added. "It will be availablewithin three days of being measured by Envisat. The system may even bepushed further to deliver water levels in less than six hours, usingnear-real time data from the precise orbit determination system aboardthe satellite known as DORIS (Doppler Orbitography and RadiopositioningIntegrated by Satellite), in order to better satisfy the actual needsof users."

Following the TIGER Workshop the River and Lakedemonstration system – which will start off by featuring products forCanada as well as Africa – will switch to other regions of the Earth ona periodic basis, beginning with Latin America.


Supportedas part of the Agency's Earth Observation Data User Element (DUE), theRiver and Lake project is aimed at developing, demonstrating andassessing an information service based on inland water altimetry.


Story Source:

The above story is based on materials provided by European Space Agency. Note: Materials may be edited for content and length.


Cite This Page:

European Space Agency. "Envisat Tracking Africa's Rivers And Lakes To Help Manage Water Resources." ScienceDaily. ScienceDaily, 16 October 2005. <www.sciencedaily.com/releases/2005/10/051006084258.htm>.
European Space Agency. (2005, October 16). Envisat Tracking Africa's Rivers And Lakes To Help Manage Water Resources. ScienceDaily. Retrieved October 1, 2014 from www.sciencedaily.com/releases/2005/10/051006084258.htm
European Space Agency. "Envisat Tracking Africa's Rivers And Lakes To Help Manage Water Resources." ScienceDaily. www.sciencedaily.com/releases/2005/10/051006084258.htm (accessed October 1, 2014).

Share This



More Earth & Climate News

Wednesday, October 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: 12 More Bodies Found on Japan Volcano

Raw: 12 More Bodies Found on Japan Volcano

AP (Oct. 1, 2014) — A dozen more bodies were found Wednesday as Japanese rescuers resumed efforts to find survivors and retrieve bodies of those trapped by Mount Ontake's eruption. (Oct. 1) Video provided by AP
Powered by NewsLook.com
Cultural Learning In Wild Chimps Observed For The First Time

Cultural Learning In Wild Chimps Observed For The First Time

Newsy (Oct. 1, 2014) — Cultural transmission — the passing of knowledge from one animal to another — has been caught on camera with chimps teaching other chimps. Video provided by Newsy
Powered by NewsLook.com
Raw: Trapped Scientist Rescued from Cave in Peru

Raw: Trapped Scientist Rescued from Cave in Peru

AP (Oct. 1, 2014) — A Spanish scientist, who spent 12 days trapped about 1300 feet underground in a cave in Peru's remote Amazon region, was rescued on Tuesday. (Oct. 1) Video provided by AP
Powered by NewsLook.com
Earth Has Lost Half Its Vertebrate Wildlife Since 1970: WWF

Earth Has Lost Half Its Vertebrate Wildlife Since 1970: WWF

Newsy (Sep. 30, 2014) — A new study published by the World Wide Fund for Nature found that more than half of the world's wildlife population has declined since 1970. Video provided by Newsy
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