GEO Brasil - UNEP

annex 1 - statistics - metadata
annex 1
7 Agricultural Surface
Unit:
1000 ha
Concept
The sum of the areas of land used for temporary and permanent cultivation,
planted and natural pastures, unused productive lands and planted forests.
Comments
Unused productive land and land that has not been used for over four years were
included.
Source IBGE - Agricultural and Cattle Ranching Census, 1970, 1975, 1980, 1985 and 1996.
Observations
8 Irrigated Lands
Unit:
1000ha
Concept
Total irrigated area at cattle ranching facilities, except for manual irrigation.
Comments
The following irrigation methods were considered: flooding, infiltration, aspersion
and others.
Source IBGE - Agricultural and Cattle Ranching Census 1970, 1975, 1980, 1985 and 1996.
Observations
A.2 - FORESTS
A.2.1 – State and Use of Forests
9 Variation in Forest Area – Native Forests -Legal Amazon
Unit:
1000ha/year
Concept
Annual deforestation rate (area annually deforested) for the States of the Legal
Amazon (9 states: PA, AM, RR, RO, AC, AP, TO, MT and MA).
Comments
1) The deforestation rate in the Amazon was calculated based on the comparative
analysis of satellite images (LandSat TM) obtained during consecutive years.
Satellite images are obtained, processed and interpreted by the National Institute
for Space Research (PRODES- Amazon Deforestation Monitoring Program),
which makes deforestation rates available on the Internet.
2) Primary and secondary forest clear cutting is counted as deforestation. Primary
forest areas are predominant in the Amazon.
3) The states where deforestation was calculated are: PA, AM, RR, RO, AC, AP,
TO, MT and MA.
Source
National Institute for Space Research - PRODES (Ministry of Science and
Technology)
Observations
10 Percentage Variation in Forest Area – Native Forests / Legal Amazon
Unit:
% per year
Concept
Annual deforestation percentage rate ([area deforested each year / remaining
forest area] x 100) for the Legal Amazon (9 states: AM, PA, RO, AP, MT, RR, AC, TO
and MA).
Comments
1) The deforestation rate in the Amazon was calculated based on the comparative
analysis of satellite images (LandSat TM) obtained during consecutive years.
Satellite images are obtained, processed and interpreted by the National Institute
for Space Research (PRODES- Amazon Deforestation Monitoring Program),
which makes deforestation rates available on the Internet.
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