ALOS/PALSAR in the Amazônia INPE experience and challenges ... · in mapping and monitoring...
Transcript of ALOS/PALSAR in the Amazônia INPE experience and challenges ... · in mapping and monitoring...
INPE experience and challenges INPE experience and challenges in mapping and monitoring in mapping and monitoring
deforestation in the Braziliandeforestation in the BrazilianAmazôniaAmazônia
Contribution of ALOS/PALSARContribution of ALOS/PALSAR
ALOS/PALSAR in theALOS/PALSAR in the AmazôniaAmazônia
Raimundo AlmeidaRaimundo Almeida--FilhoFilho
1000 km
AP
AM PA
ACRO
MT
TO
MA
RR
ALOS/PALSAR in theALOS/PALSAR in the AmazôniaAmazônia
BrazilianAmazônia
Western Europe
Orbital remote sensing is the only effective mean to map Orbital remote sensing is the only effective mean to map and monitor deforestation: and monitor deforestation: PRODESPRODES and and DETERDETER ProjectsProjects
Brazilian Amazônia covers approximately 5 mi of sq km(~ 80% domain tropical rain forests)
PRODESPRODES ProjectProject(www.obt.inpe.br/prodes)
Conducted by INPE since 1988, produces the annual gross deforestation map of the Brazilian
Amazônia, based on Landsat-TM images
ALOS/PALSAR in the AmazôniaALOS/PALSAR in the Amazônia
ForestDeforestationCerrado
1000 km
Itaituba
Santarém
TucuruíAltamira
Arch
Alenquer
Land cover Map(PRODES, 2003)
ALOS/PALSAR in the AmazôniaALOS/PALSAR in the Amazônia
Defore
statio
n
ALOS/PALSAR in the AmazôniaALOS/PALSAR in the Amazônia
Forest Pasture Soybean
Cycle of the Deforestation
Source: VEJA
91 92 93 94 95 96 97 98 99 00 01 02 03 2004
100
160
200
Area with soybean(Brazil)
Source: IPEA
3.6 % / year 13.8 % / year
1991=100
55
60
65
70
75
80
85
90
95
100
105
1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
- mill
ions
of
head
s --
Amazonian cattle stock
Source: IPEA
Beef & soybean: commodities for the international market
DETERDETER ProjectProject((www.obt.inpe.br/deter))
Conducted by INPE since last year. It works like an alert system to detect incipient
deforestation in a quasi-real time
•• MODIS images (Terra & MODIS images (Terra & AcquaAcqua), at 250m spatial ), at 250m spatial resolution and ~ 3resolution and ~ 3--day coverage cycle;day coverage cycle;
•• WFI images (CBERS), at 260m spatial resolution and WFI images (CBERS), at 260m spatial resolution and 33--day coverage cycle. day coverage cycle.
ALOS/PALSAR in theALOS/PALSAR in the AmazôniaAmazônia
Previous Deforestation
April 22 – May 07Deforestation 2004
May 21May 24 – June 08
Forest
20 km
ALOS/PALSAR in the AmazôniaALOS/PALSAR in the Amazônia
DETER map showing deforestation in different dates during 2004
Cloud cover highly challenges requirements for an operational deforestation surveillance program at an
Amazonian scale based only on optical data
Landsat-TM Cloud Cover Frequency
100%
<10%
Along the Arch of Deforestation, at least one free-cloud scene has been
obtained each year
ALOS/PALSAR in theALOS/PALSAR in the AmazôniaAmazônia
Radar data are strongly necessary to complement optical data and ALOS/PALSAR may contribute to improve contents of PRODES and DETER Projects.
Landsat-TM Cloud Cover Frequency
100%
<10%
ALOS/PALSAR in theALOS/PALSAR in the AmazôniaAmazônia
ALOS/PALSAR Prototype Area
ALOS/PALSAR in the AmazôniaALOS/PALSAR in the Amazônia
Prototype area covers the entire Brazilian Amazônia, including
some particular case-study sites
• To evaluate ALOS/PALSAR mosaics to map gross deforestation and estimate deforestation rates to support PRODES and DETER Projects;
• To use ALOS/PALSAR mosaics to map deforestation in areas of frequent cloud cover;
• To investigate ALOS/PALSAR data to map areas of selective logging and areas of bamboo forest;
• To use ALOS/PALSAR polarimetric data to estimate forest vertical biomass distribution;
• To use ALOS/PALSAR mosaics to monitor forest clearing and vegetation regrowth along the Urucu-Coari-Manaus Pipeline.
Objectives in the Prototype Area
ALOS/PALSAR in theALOS/PALSAR in the AmazôniaAmazônia
MainMain output products• Maps of gross deforestation over the entire Brazilian
Amazônia and estimation of deforestation rates, during the years of ALOS/PALSAR activity;
• Maps in areas of selective logging over the entire Brazilian Amazônia, during the years of ALOS/PALSAR activity;
• Maps of forest clearing and regeneration along the Urucu-Coari-Manaus Pipeline;
(All these products will be included in INPE´s web site)
ALOS/PALSAR in the AmazôniaALOS/PALSAR in the Amazônia