Development and Validation of Algorithm for Vegetation Biomass Monitoring based on Satellite Data

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A vegetation index was calculated from the measured spectral reflectance of grass and Landsat TM data. The correlation coefficients among the radiance ratios and vegetation coverage, biomass, LAI (Leaf Area Index) and chlorophyll concentration were then calculated in arid and semi arid areas. The vegetation index and LAI were obtained from the reflectance in the red and the NIR spectral bands. The following results were obtained : the various vegetation variables and reflectances show a high accuracy in ratio of radiance in red and NIR spectral bands. However the correlations between the vegetation index and vegetation coverage is low. The results show that the vegetation index is gradually saturated as LAI and biomass increases.