Monitoring land at regional and national scales and the role of remote sensing

Dymond John R., Bégué Agnès, Lo Seen Danny. 2001. Monitoring land at regional and national scales and the role of remote sensing. International Journal of Applied Earth Observation and Geoinformation, 3 (2) : 162-175.

https://doi.org/10.1016/S0303-2434(01)85008-X

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Autre titre : Le suivi des terres aux échelles régionale et nationale et le rôle de la télédétection

Résumé : There is a need world wide for monitoring land and its ecosystems to ensure their sustainable use. Despite the laudable intentions of Agenda 21 at the Rio Earth Summit, 1992, in which many countries agreed to monitor and report on the status of their land, systematic monitoring of land has yet to begin. The problem is truly difficult, as the earth's surface is vast and the funds available for monitoring are relatively small. This paper describes several methods for cost-effective monitoring of large land, areas, including: strategic monitoring; statistical sampling; risk-based approaches; integration of land and water monitoring; and remote sensing. The role of remote sensing is given special attention, as it is the only method that can monitor land exhaustively and directly, at regional and national scales. It is concluded that strategic monitoring, whereby progress towards environmental goals is assessed, is a vital element in land monitoring as it provides a means for evaluating the utility of monitoring designs.

Mots-clés Agrovoc : télédétection, politique de l'environnement, dégradation de l'environnement, mesure (activité), échantillonnage, érosion, désertification, changement climatique, biodiversité

Classification Agris : U30 - Méthodes de recherche
P01 - Conservation de la nature et ressources foncières
F08 - Systèmes et modes de culture

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