Science et changements planétaires / Sécheresse


Remote sensing images and the normalized difference vegetation index (NDVI) as a means of observing the vegetation of West Africa Volume 13, issue 3, Septembre 2002


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Université du Havre, UMR « IDEES » 6063 du CNRS, Centre interdisciplinaire de recherches en transports et affaires internationales, 25, rue Philippe-Lebon 76086 Le Havre Cedex.
  • Page(s) : 187-94
  • Published in: 2002

West Africa is often affected by dramatic droughts that have very important consequences on the fragile vegetation of this region. This delicate situation requires a short-, medium-, and long-term observation in order to offer a better forecast and a better understanding of such events and to provide sensible solutions. This study shows how the treatment of a time series using NOAA remote sensing images, transformed into Normalized Difference Vegetation Index (NDVI), has allowed a regular and fine observation of the vegetation dynamics in this fragile area.