monitoring deforestation in amazonia using remote sensing luís fernandes executive secretary mct...
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Monitoring Deforestation in Amazonia using Remote Sensing
Luís FernandesExecutive Secretary MCT
Ministério da Ciência e Tecnologia
Monitoring Amazon Deforestation
Near real-time detection of newly deforested areas (DETER) Uses MODIS data (250 m resolution, 2 days revisit) Maps produced weekly Supports law-enforcement
Detailed assessment of deforestation (PRODES) Uses LANDSAT (30 m resolution, 18 days revisit)
and CBERS (20 m resolution, 25 days revisit) Other satellite data is used when needed Detailed maps produced yearly Supports policy-making
CBERS: China-Brazil Earth Resources Satellite
Brief History Initial agreement signed in July 6th, 1988, covering
CBERS-1 and 2. In 2002, both governments decided to expand the
initial agreement by including CBERS-3 and 4.
Program objectives Build a family of remote sensing satellites to
support the needs of users in earth resources applications
Improve the industrial capabilities of space technology in Brazil and China
CBERS-2 Launch(21 October 2003)
CBERS-2
CBERS Program Timeline
Launch Date
Operation
2004 2005 2006 2007 2008 2009 2010 2011
CBERS-1 1999 4 years
CBERS-2 2003 4 years
CBERS-2B 2006 4 years
CBERS-3 2008 5 years
CBERS-4 2011 5 years
Near real-time detection of newly deforested areas
Supports law-enforcement
Information available as soon as possible Location and period of newly deforested area Accurate only for areas greater than 100 ha
Fast result dissemination via Web
DETER – Sensors
TERRA e AQUA
MODIS - Moderate-resolution
Imaging Spectroradiometer
Temporal resolution: DailySpatial resolution: 250 m
CBERS - China-Brazil Earth Resources Satellite
WFI sensorTemporal resolution: 5 days
Spatial resolution: 250 m
Large deforestation detected by Deter in 22/jun/2004, in Altamira/PA
Landsat 5 image of 22 Aug 2003 without deforestation evidences
Grande desmatamento detectado pelo Deter em 22/jun/2004, município de Altamira/PA (s 05 08 11.89 o 53 55 15.73) Large deforestation detected by Deter in 22/jun/2004, in Altamira/PA
MODIS image of 07 May 2004 without deforestation evidences
MODIS image of 08 June 2004 showing first evidences of deforestation
Large deforestation detected by Deter in 22/jun/2004, in Altamira/PA
Large deforestation detected by Deter in 22/jun/2004, in Altamira/PA
MODIS image of 22 June 2004 showing full extent of deforestation (6000 ha)
Large deforestation detected by Deter in 22/jun/2004, in Altamira/PA
Government actions in area:
(a)Offender fined and jailed
(b)Environmental protection area created
Detailed assessment of deforestation (PRODES)
Estimates yearly rates of gross deforestation
Estimates the extension of gross deforestation
Produces a digital data base
Maps available on the Internet www.obt.inpe.br/prodes
Detailed assessment of deforestation (PRODES)
Computer aided image interpretation
Improvements in 2005 Use of multisatellite data Results available in the same calendar year
Technology developed by INPE Open source software
Deforestation
Forest
Non-forest
Clouds/no data
INPE/PRODES 2003/2004:
Deforestation Map
Deforestation Map: Key Areas
New frontiers
Consolidated areas still under high deforestation pressure.
Deforestation
Forest
Non-forest
Clouds/no data
INPE/PRODES 2003/2004:
General Concepts: Increment and Rate
Deforestation Increment Calculated for each image scene Sensitive to date of image acquisition
Deforestation Rate Estimated on a image basis Areas under cloud cover have deforested area
estimated from regional trends Rates are normalized to a reference date: 1
August
Impact of cloud cover
To reduce the impact of cloud cover, INPE combines images from different dates
166-112
116-113
116-112
Combination CBERS-LANDSAT
Combination CBERS-LANDSAT (zoom)
Reducing cloud effect (date 1)
Reducing cloud effect (date 2)
Deforestation estimates for 2005
Year Num images
Measured deforest
area
Estimated deforesta
tarea
Final measured
area
2003-2004
76 22.870 26.150 27.200
2004-2005
77 16.600 18.900 -
Difference in rates 2005-2004 (%)
MT/PA: areas more than 1000 ha (2004)
MT/PA: areas more than de 1000 ha (2005)
BR-163: areas greater than 100 ha (2004)
BR-163: areas greater than 100 ha (2005)
Cumaru (PA): areas greater than 100 ha (2004)
Cumaru (PA): areas greater than 100 ha (2005)