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Auteur J. Achache |
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Looking after water in Africa / J. Achache in ESA bulletin, n° 117 (February 2004)
[article]
Titre : Looking after water in Africa Type de document : Article/Communication Auteurs : J. Achache, Auteur ; J. Aschbacher, Auteur ; S. Briggs, Auteur Année de publication : 2004 Article en page(s) : pp 29 - 35 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] Afrique (géographie politique)
[Termes IGN] développement durable
[Termes IGN] eau souterraine
[Termes IGN] hydrogéologie
[Termes IGN] image satellite
[Termes IGN] précipitation
[Termes IGN] ressources en eauRésumé : (Auteur) Water resources, the “blue gold” of the 21st century, can be successfuly minitored from space using Earth-observation technology. Satellite can measure precipitation, atmospheric water content, soil moisture, surface run-off, lake and river levels, groundwater reservoirs, as well as ice and snow cover. Improved sensors, better modelling and a deeper understanding of the underlying science have substantially advanced our knowledge of the global water cycle in recent years. However, there are still major shortcomings in both the understanding and the observation of key parameters. The estimation of groundwater resources, for example, poses a major challenge, as they are not directly visible from space. Indirect methods based on gravity-field measurements, interferometery and altimetric monitoring of rivers need to be applied to gain knowledge of reservoir volumes and flows. In order to improve our capabilities and to offert this technology to people in developing countries, ESA has launched a new programme focusing on the use of space technology for water-resource management in Africa. The initiative, called 'TIGER' is a direct followup engagement of ESA's strong engagement in the 2002 Johannesburg World Summit off Sustainable Development, and implements its recommendations through concrete actions. Numéro de notice : A2004-156 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26683
in ESA bulletin > n° 117 (February 2004) . - pp 29 - 35[article]