@MastersThesis{Rivera-Lombardi:2003:EsReQu,
author = "Rivera-Lombardi, Roberto Javier",
title = "Estudo de recorr{\^e}ncia de queimadas e perman{\^e}ncia de
cicatrizes de fogo em {\'a}reas selecionadas do Cerrado
brasileiro, utilizando imagens TM/Landsat",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2003",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2003-05-23",
keywords = "sensoriamento remoto, queimadas, cerrado, sistemas de
informa{\c{c}}{\~a}o geogr{\'a}fica, remote sensing, forest
fires, grasslands, remote sensing, geographic information
systems.",
abstract = "O presente trabalho tem como objetivo estudar o processo de
recorr{\^e}ncia interanual de queimadas em {\'a}reas
selecionadas do Cerrado brasileiro, atrav{\'e}s de an{\'a}lise
multitemporal de imagens TM-Landsat 5. Considerou-se um
per{\'{\i}}odo de cinco anos (1996 a 2000) concentrando a
an{\'a}lise no per{\'{\i}}odo seco (maio a outubro).
Verificou-se ainda o comportamento das recorr{\^e}ncias
interanuais nos diferentes tipos de fisionomias vegetais do
Cerrado. O trabalho abordou tamb{\'e}m o estudo sobre a
perman{\^e}ncia das cicatrizes do fogo nas imagens do
sat{\'e}lite Landsat 5, derivadas do processo de queima de
biomassa vegetal, com vistas a identificar o intervalo m{\'a}ximo
de tempo entre imagens TM-Landsat para assegurar a presen{\c{c}}a
de ind{\'{\i}}cios de ocorr{\^e}ncia de queimadas nas
diferentes fisionomias vegetais do Cerrado. A {\'a}rea de estudo
compreendeu duas cenas de sat{\'e}lite (185 km x 185 km, cada),
correspondentes {\`a}s {\'o}rbitas ponto 221/69 (setor Chapada
dos Veadeiros) e 223/67 (setor Araguaia), localizadas na
regi{\~a}o centro-oeste do pa{\'{\i}}s ({\'a}rea core do
Cerrado brasileiro). Ao todo, foram utilizadas 63 cenas
TM-Landsat, em composi{\c{c}}{\~a}o colorida das bandas 3
(azul), 4 (vermelho) e 5 (verde). Quantificou-se, tamb{\'e}m, a
extens{\~a}o da {\'a}rea queimada em cada ano do
per{\'{\i}}odo de estudo, diferenciando-a por tipo de fisionomia
vegetal afetada pelo processo de queima. Verificou-se que existe
um decr{\'e}scimo significativo na {\'a}rea queimada anualmente,
entre os anos 1996 e 2000, de aproximadamente 60%; entretanto, as
fisionomias mais afetadas se mantiveram inalteradas no
per{\'{\i}}odo considerado (campo cerrado e parque de cerrado).
Observou-se, tamb{\'e}m, durante o per{\'{\i}}odo investigado,
a influ{\^e}ncia de um ano extremamente seco (1998) no
n{\'u}mero de queimadas e na {\'a}rea afetada por queimadas na
{\'a}rea de estudo. Esta {\'u}ltima apresentou um incremento, em
rela{\c{c}}{\~a}o ao ano anterior (1997), de aproximadamente
5.500 km2. Com rela{\c{c}}{\~a}o {\`a} recorr{\^e}ncia
interanual de queimadas, observou-se que o tipo de
recorr{\^e}ncia mais comum foi o caracterizado pela
ocorr{\^e}ncia de apenas duas queimadas (independente do ano de
ocorr{\^e}ncia das mesmas) no per{\'{\i}}odo de 1996-2000 (77%
no setor Chapada dos Veadeiros e 62% no setor Araguaia). Da
{\'a}rea total afetada por recorr{\^e}ncias, aquelas
caracterizadas por apenas duas queimadas, espa{\c{c}}adas por
dois anos, predominaram nos dois setores da {\'a}rea de estudo
(52% no setor Chapada dos Veadeiros e 37% no setor Araguaia). A
an{\'a}lise das cicatrizes do fogo nas imagens TM-Landsat indicou
uma varia{\c{c}}{\~a}o anual significativa na perman{\^e}ncia
das mesmas, em cada ano e por tipo de fisionomia. Entretanto,
observou-se consist{\^e}ncia em ambas {\'a}reas de estudo,
relativo {\`a}s perman{\^e}ncias mais curtas e mais longas, as
quais foram respectivamente associadas {\`a}s fisionomias de
campo (campo limpo ou sujo) e campo cerrado. ABSTRACT: The present
study aims at studying the interannual recurrence of biomass
burning in selected areas of the Brazilian Cerrado, through a
multitemporal analysis of TMLandsat images. A period of five years
(from 1996 to 2000) was considered, focusing in the dry period
(from May to October). The behaviour of the interannual recurrence
in the different types of physiognomies was also assessed. The
study also addressed the issue related to the permanence of the
burning scars in the TM-Landsat imagery, resulting from biomass
burning. The aim was to identify the maximum period of time
between TM-Landsat images to ensure that the burning scars are
still identifiable, in the different types of physiognomies of the
Cerrado. The study area comprised two TMLandsat scenes (185 km by
185 km each), corresponding to path/row 221/69 (Chapada dos
Veadeiros site) and 223/67 (Araguaia site), both located in the
core area of the Brazilian Cerrado. A total of 63 TM-Landsat
images colour composite of bands 3 (blue), 4 (red) e 5 (green)
were analyzed. The extent of the area burned in the study area was
also computed by physiognomy type. A decrease of approximately 60%
in the annual area burnt, from 1996 to 2000, was noted in both
sites; however, wooded savannah (campo cerrado) and savannah park
(parque de cerrado) remained consistently as the most affected
physiognomies. The choice of the period of study allowed to
identify the influence of an extremely dry year (1998) in the
number of burns and the area affected by biomass burning in the
study area. An increment of the burnt area of approximately 5,500
km2 was observed in 1998, with respect to 1997 in the study area.
With respect to the interannual recurrence of biomass burning, it
was noted that the most common type of recurrence was that
characterized by the occurrence of only two burns (regardless of
the years affected by the burns) in the period 1996 2000 (77% of
the recurrences in the Chapada dos Veadeiros site and 62% in the
Araguaia site). Of the total area affected by recurring fires, the
recurrences characterized by only two burns, spaced by two years,
were predominant in both sites of the study area (52% in the
Chapada dos Veadeiros site and 37% in the Araguaia site). The
analysis of the burnt scars in the TM-Landsat images indicated a
large variation in their permanence per year and by physiognomy.
However, there was consistency in both sites of the study area
regarding the shorter and longer permanence, which were
respectively associated with the grassland savannah (campo limpo)
and shrub savannah (campo sujo), and the wooded savanna (campo
cerrado) physiognomies.",
committee = "Setzer, Alberto Waingort (presidente) and Krug, Thelma
(orientadora) and Santos, Jo{\~a}o Roberto dos (orientador) and
Miranda, Helo{\'{\i}}sa Sinatora and Martins, Fernando Roberto",
copyholder = "SID/SCD",
englishtitle = "Study of the recurrence of fires and permanence of burnt scars in
selected areas of the brazilian Cerrado using TM-Landsat imagery",
language = "pt",
pages = "172",
ibi = "6qtX3pFwXQZ3P8SECKy/yC3Fd",
url = "http://urlib.net/ibi/6qtX3pFwXQZ3P8SECKy/yC3Fd",
targetfile = "paginadeacesso.html",
urlaccessdate = "11 maio 2024"
}