Featured Research

from universities, journals, and other organizations

Satellites Help Locate Water In Niger

Date:
January 21, 2009
Source:
European Space Agency
Summary:
Like most sub-Saharan African countries, Niger faces problems meeting its water needs. As part of ESA’s TIGER initiative, satellite data are being used to identify underground water resources in the drought-prone country.

Map of underground water infiltration probability around the Niamey area in 2007.
Credit: Advanced Computer Systems S.p.A.

Like most sub-Saharan African countries, Niger faces problems meeting its water needs. As part of ESA’s TIGER initiative, satellite data are being used to identify underground water resources in the drought-prone country.

Due to the rainfall variability in time and in space, during recent years the rain-fed agriculture struggles to meet the requirements of food security in the Sahel area.

ESA’s WADE (Water resources Assessment using SAR in Desert and arid lands in West African Ecosystems) project, funded by the Data User Element (DUE), uses ERS and Envisat Synthetic Aperture Radar (SAR) imagery to map and monitor the location and extent of surface water bodies and to identify potential areas for water infiltration.

Having access to these maps will help local water authorities to better manage their water resources, lead livestock to water and improve their water storage capacity.

The Advanced Computer Systems (ACS spa) in Rome, Italy, developed the WADE processing system in conjunction with local users, represented by AGRHYMET (the Regional Centre of the Permanent Interstate Committee for Drought Control in the Sahel).

To demonstrate the technology, ERS and Envisat SAR data from 1993 to 2007 were integrated with in-situ data over an area of about 100 000 km² in the west part of Niger. Based on these data, a water body classification map was generated for each year. Results have been validated against 90 sampling points collected in the field by AGRHYMET during summer 2007 and showed an overall accuracy of 100% for permanent water bodies and above 75% for semi-permanent water bodies.

"Permanent and semi-permanent water body monitoring is an essential resource for rangeland activities and irrigated agriculture areas in the semi-arid zone," said Issifou Alfari, AGRHYMET’s Head of Water Resources Management and Desertification Division. "We are very happy with the project’s scope and outcome, as we believe this source of information will be fundamental for water management activities."

In November 2008, WADE software and data were installed in AGRHYMET’s facilities in Niamey, Niger’s capital city. Following extensive training sessions, AGRHYMET employees are now using the system to carry out their monitoring.

"The WADE system fits well into AGRHYMET general activities, particularly providing accurate water resource management information at regional and national levels," Alfari said.

ESA launched the TIGER initiative in 2002 to exploit Earth Observation (EO) technologies in order to respond to the urgent need for reliable water information in Africa.

WADE is one of five TIGER Innovator projects, which use the latest EO technology to develop innovative, low-cost solutions to support African water authorities in the conservation and monitoring of scarce water resources.


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. "Satellites Help Locate Water In Niger." ScienceDaily. ScienceDaily, 21 January 2009. <www.sciencedaily.com/releases/2009/01/090119094856.htm>.
European Space Agency. (2009, January 21). Satellites Help Locate Water In Niger. ScienceDaily. Retrieved September 3, 2014 from www.sciencedaily.com/releases/2009/01/090119094856.htm
European Space Agency. "Satellites Help Locate Water In Niger." ScienceDaily. www.sciencedaily.com/releases/2009/01/090119094856.htm (accessed September 3, 2014).

Share This



More Earth & Climate News

Wednesday, September 3, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Thousands of Fish Dead in Mexico Lake

Raw: Thousands of Fish Dead in Mexico Lake

AP (Sep. 2, 2014) — Over 53 tons of rotting fish have been removed from Lake Cajititlan in western Jalisco state. Authorities say that the thousands of fish did not die of natural causes. (Sep. 2) Video provided by AP
Powered by NewsLook.com
Raw: Iceland Volcano Spewing Smoke

Raw: Iceland Volcano Spewing Smoke

AP (Sep. 2, 2014) — The alert warning for the area surrounding Iceland's Bardarbunga volcano was kept at orange on Tuesday, indicating increased unrest with greater potential for an eruption. Smoke is spewing from the volcano, and lava is spouting nearby. (Sept. 2) Video provided by AP
Powered by NewsLook.com
U.N. Says Ebola Travel Restrictions Will Cause Food Shortage

U.N. Says Ebola Travel Restrictions Will Cause Food Shortage

Newsy (Sep. 2, 2014) — The U.N. says the problem is two-fold — quarantine zones and travel restrictions are limiting the movement of both people and food. Video provided by Newsy
Powered by NewsLook.com
Halliburton Reaches $1B Gulf Spill Settlement

Halliburton Reaches $1B Gulf Spill Settlement

AP (Sep. 2, 2014) — Halliburton's agreement to pay more than $1 billion to settle numerous claims involving the 2010 BP oil spill could be a way to diminish years of costly litigation. A federal judge still has to approve the settlement. (Sept. 2) Video provided by AP
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