@incollection{fdi:010008953,
  title = {{D}esertification watch in {T}unisia : land surface changes during the last 20 years and onwards},
  author = {{E}scadafal, {R}ichard and {B}acha, {S}. and {D}ela{\^i}tre, {E}ric},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study of desertification is based on ground measurement of reflectance properties of the different land degradation levels recognised by field ecologists in {S}outhern {T}unisia. {L}andsat {MSS} images from 1972 onwards recorded have been superimposed after geometrical correction. {U}sing the field reflectance data ground features of low temporal variability were taken as radiometric references. {T}his allowed to adjust for the differences in radiometry of the images and to detect temporal variations of image-derived indices. {T}hese indices, i.e. brightness, vegetation and colour were found to be correlated with land surface parameters such as roughness, green vegetation density and soil surface composition. {A}s a result fluctuations of areas with degraded soil and mobilised sand could be monitored as well as areas treated by wind barriers or exclosure which appear darker. {T}he overall trend is currently a significant recovery of the ecosystems after the severe drought and eolisation of the 80's. {T}his experiment demonstrates the feasibility of long term monitoring of arid ecosystem changes, and its potential for the implementation of desertification control programmes. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{TELEDETECTION} {SPATIALE} ; {DESERTIFICATION} ; {IMAGE} {SATELLITE} ; {SATELLITE} {LANDSAT} ; {PRETRAITEMENT} {D}'{IMAGE} ; {CORRECTION} {RADIOMETRIQUE} ; {DEGRADATION} {DU} {SOL} ; {VARIATION} {TEMPORELLE} ; {TUNISIE} ; {MENZEL} {HABIB} {REGION}},
  booktitle = {{R}emote sensing' 96 : integrated applications for risk assessment and disaster prevention for the {M}editerranean},
  numero = {},
  pages = {35--40},
  address = {{R}otterdam},
  publisher = {{A}.{A}. {B}alkema},
  series = {},
  year = {1997},
  ISBN = {90-5410-855-{X}},
  URL = {https://www.documentation.ird.fr/hor/fdi:010008953},
}