INTERACTIONS AGRICULTURE - FORET TROPICALE - APPREHENSION D'UN PHENOMENE GLOBAL, DISPERSE ET DYNAMIQUE
The disappearance of the tropical forest is one of the major ecological events of our time. Transformations taking place in the biome have, in the last few years, taken very large proportions and the possible impacts of such drastic changes in the vegetation canopy of extended regions are only beginning to be assessed. An approach is presented whereby large scale assessments of deforestation rates can be made. The approach relies upon the analysis of the vegetation index and thermal data derived from the NOAA-AVHRR 1 km resolution instrument. It is shown that the opening of the forest canopy creates heat islands which are easily detected using the thermal channel of the instrument. The case of the Amazon basin is described and series of examples show that forest clearing rates have increased exponentially in some parts of the basin. The role of fire as indicator and agent of forest disturbances is also examined.
Bibliographic Reference: JOURNEE D'ETUDE EN TELEDETECTION, LOUVAIN-LA NEUVE (BELGIUM), MARCH 27, 1987 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER F 33328 ORA
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Record Number: 1989126034401 / Last updated on: 1989-01-01
Available languages: fr