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Proceedings Paper

Theoretical assessment of short-wavelength infrared for monitoring natural vegetation in Burkina Faso
Author(s): Agnes Begue; Fabrice Mauries; Gerard Laine
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Paper Abstract

Western Burkina-Faso is a pole of intense population migration that conducts to problems of space saturation and land degradation. The present study deals with the natural vegetation characterization of this region using the high resolution visible and infrared (HRVIR) sensor that will be launched on SPOT 4. We adopted a theoretical approach which consists in evaluating the capacity of the future short wavelength infrared (SWIR) band to discriminate natural vegetation types using a 3D radiative transfer model (Myneni's model). Simulations were conducted with realistic input parameters (different vegetation structure, soil, satellite, atmospheric conditions . . .) during dry and rainy seasons. The outputs of the simulations (bi-directional reflectances, vegetation indices) were used to study the sensitivity of the SWIR to vegetation type and to external conditions. The results show that the SWIR band is well correlated with the red channel during the wet season, and with the near infrared (NIR) and red channels during the dry season. Its sensitivity to the atmosphere is low, and the sensitivity to the soil type is medium. The sensitivity to the woody cover is high during the dry season (about 1.6 points of reflectance per 10% of woody cover) but is still equivalent to the NIR sensitivity. Spectral vegetation indices including SWIR do not provide additional information on the structure of the vegetation canopy.

Paper Details

Date Published: 30 December 1997
PDF: 11 pages
Proc. SPIE 3222, Earth Surface Remote Sensing, (30 December 1997); doi: 10.1117/12.298169
Show Author Affiliations
Agnes Begue, CIRAD-CA (France)
Fabrice Mauries, CIRAD-CA (France)
Gerard Laine, CIRAD-CA (France)

Published in SPIE Proceedings Vol. 3222:
Earth Surface Remote Sensing
Giovanna Cecchi; Edwin T. Engman; Eugenio Zilioli, Editor(s)

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