Abstract:RESUMO -Um dos agentes mais empregados na supressão de áreas florestais no Estado de São Paulo é o fogo, por meio de queimadas que, quando fora de controle, podem converter-se em incêndios responsáveis pela destruição de extensos ecossistemas. Na Bacia do Rio Corumbataí, SP, os incêndios são um dos causadores de fragmentação e degradação da cobertura florestal. Nesse contexto, este trabalho objetivou a realização do mapeamento de risco de incêndios florestais na Bacia do Rio Corumbataí, utilizando-se a avaliaç… Show more
“…The combined use of environmental variables traditionally used in studies of forest fire risk assessment in Brazil (FERRAZ;VETTORAZZI, 1998;PEZZOPANE et al, 2001;SILVEIRA et al, 2008;RIBEIRO et al, 2012) with the analysis of the influence of rural settlements and the density of hotspots detected in the municipality over the past 17 years was important for risk detection based on remote sensing data and spatial analysis techniques.…”
Section: Discussionmentioning
confidence: 99%
“…The risk mapping was performed by constructing a spatial database organized in the ArcGIS version 10.2 software based on a modified methodology of the procedures described in Silveira et al (2008). Although the types and number of factors reported in the literature varied (PEZZOPANE et al, 2001;CHUVIECO et al, 2010;SOTO, 2012;POURTAGHI et al, 2015), we opted for the definitions of frequently used explanatory variables that are representative of the area and freely available.…”
Section: Methodsmentioning
confidence: 99%
“…They can cause considerable environmental damage, especially in protected areas, such as biodiversity loss, soil erosion, emission of gases into the atmosphere that intensify the greenhouse effect and decreased local air quality (SILVA et al, 2003;SILVEIRA et al, 2008). …”
-Forest fires are a permanent threat in urban-forest interface areas and cause considerable environmental damage, especially in protected areas. An efficient way to assist decision-making to prevent an increase in forest fires is risk assessment using geographical information systems (GIS). The objective of this study was to evaluate the risk of forest fires in the municipality of Bodoquena, Mato Grosso do Sul, Brazil, using remote sensing data and spatial analysis techniques implemented in a GIS. The procedures of the methodology are based on spatial analysis techniques to prepare maps of the likelihood of fire based on calculations of the Euclidean distance, the Kernel statistical method and fuzzy transformation and to combine these maps via the increasing diffuse overlay method. The results showed a high risk of forest fires on the margins of the urban area, rural settlements and main roads that cross the municipality, as well as the surrounding areas. It is concluded that the municipality of Bodoquena has a high risk of forest fires in areas with high biodiversity, especially the areas surrounding the Serra da Bodoquena National Park and Mato Grosso do Sul Pantanal.
“…The combined use of environmental variables traditionally used in studies of forest fire risk assessment in Brazil (FERRAZ;VETTORAZZI, 1998;PEZZOPANE et al, 2001;SILVEIRA et al, 2008;RIBEIRO et al, 2012) with the analysis of the influence of rural settlements and the density of hotspots detected in the municipality over the past 17 years was important for risk detection based on remote sensing data and spatial analysis techniques.…”
Section: Discussionmentioning
confidence: 99%
“…The risk mapping was performed by constructing a spatial database organized in the ArcGIS version 10.2 software based on a modified methodology of the procedures described in Silveira et al (2008). Although the types and number of factors reported in the literature varied (PEZZOPANE et al, 2001;CHUVIECO et al, 2010;SOTO, 2012;POURTAGHI et al, 2015), we opted for the definitions of frequently used explanatory variables that are representative of the area and freely available.…”
Section: Methodsmentioning
confidence: 99%
“…They can cause considerable environmental damage, especially in protected areas, such as biodiversity loss, soil erosion, emission of gases into the atmosphere that intensify the greenhouse effect and decreased local air quality (SILVA et al, 2003;SILVEIRA et al, 2008). …”
-Forest fires are a permanent threat in urban-forest interface areas and cause considerable environmental damage, especially in protected areas. An efficient way to assist decision-making to prevent an increase in forest fires is risk assessment using geographical information systems (GIS). The objective of this study was to evaluate the risk of forest fires in the municipality of Bodoquena, Mato Grosso do Sul, Brazil, using remote sensing data and spatial analysis techniques implemented in a GIS. The procedures of the methodology are based on spatial analysis techniques to prepare maps of the likelihood of fire based on calculations of the Euclidean distance, the Kernel statistical method and fuzzy transformation and to combine these maps via the increasing diffuse overlay method. The results showed a high risk of forest fires on the margins of the urban area, rural settlements and main roads that cross the municipality, as well as the surrounding areas. It is concluded that the municipality of Bodoquena has a high risk of forest fires in areas with high biodiversity, especially the areas surrounding the Serra da Bodoquena National Park and Mato Grosso do Sul Pantanal.
“…Porém, estradas podem ser um fator desencadeante seja devido a incêndios criminosos; prática de cultos religiosos; incêndios causados por cigarros e fogueiras, além de outras ocorrências, portanto devem ser consideradas quando se realiza uma análise de zoneamento de riscos de fogo (FERRAZ;VETTORAZZI, 1998;SILVEIRA;VALENTE, 2008;RIBEIRO et al, 2008).…”
RESUMOO presente trabalho apresenta o desenvolvimento de uma metodologia para o zoneamento de risco de incêndio para a bacia hidrográfica do Córrego do Petiço, localizado no município de Botucatu/SP. A utilização do Sistema de Informação Geográfica foi utilizado para a elaboração dos mapas de riscos referentes as classes de altimetria, declividade, face de exposição do terreno, influência da hidrografia, influência de estradas e uso ocupação do solo. Os fatores foram integrados e todas as variáveis receberam o mesmo peso e a sobreposição dessas informações gerou o mapa de zoneamento de risco de incêndios florestais da bacia. Os resultados apontaram o risco de incêndio 'Baixo' 1,49 %, 'Moderado' 44,47 %, 'Alto' 53,53 % e 'Muito Alto' 0,51 % do total da área da bacia, não foi observada a classe de risco 'Extremo' na área. As classes de risco 'Alto' e 'Muito Alto' merecem maior atenção, se somadas, pois representam mais da metade da área da bacia e para tais classes é necessário um planejamento e outras práticas preventivas ao combate de incêndios.
PALAVRAS-CHAVE:Incêndios. Sistema de Informação Geográfica. Zoneamento. 'Low' 1.49 % 'Moderate' 44.47 %, 'High' 53.53 % and 'Very High' 0.
ABSTRACT
The present work introduces the development of a methodology for zoning the fire risk to the watershed of Petiço stream, located in the municipality of Botucatu/SP. The Geographical Information System was used for the preparation the risk maps relative of altimetry, slope, terrain display face, influence of hydrographic, influence of roads, use and occupation of land. The factors were integrated and all variables are given the same weight, the overlap of the information generated the map of zoning risk of forest fires in the watershed. The results indicate the risk of fire
“…Já áreas de reflorestamento podem representar um benefício para a conservação de fragmentos florestais, pois atenuam o efeito de borda e diminuem o risco de incêndio (Viana & Pinheiro, 1998). Silveira et al (2008) relatam que a matriz na qual o fragmento está inserido representa o segundo fator de maior importância e influência para os riscos de incêndios florestais.…”
RESUMOEste trabalho teve por objetivo analisar o uso da terra no entorno de 143 unidades amostrais (UA) na floresta ombrófila mista em Santa Catarina e verificar a possível relação do uso da terra com o estado da vegetação. Foram utilizados um mapeamento do uso da terra de 2005 e dados da vegetação coletados em 143 UA do Inventário Florístico Florestal de Santa Catarina (IFFSC) entre 2007 e 2009. O entorno foi delimitado por buffers de distâncias distintas a partir do centro da UA. A cobertura florestal dos entornos e a distância entre a UA e a borda do fragmento apresentaram correlação significativa com riqueza e abundância de espécies climácicas, além de correlação negativa com riqueza e abundância de espécies pioneiras (α = 0,05) no fragmento. As paisagens com maior cobertura florestal e com maiores fragmentos permitem a manutenção de florestas mais bem conservadas e com menor influência da matriz no entorno.Palavras-chave: métricas da paisagem, efeito de borda, floresta ombrófila mista.
Use of Surrounding Land Influences Forest RemantsComposition and Structure Forest coverage and distance between SP and fragment edge showed significant correlations with richness and abundance of climax species and a negative correlation with richness and abundance of pioneer species (α=0.05) in the fragment. The landscapes with greater forest coverage and larger patches allow the best preserved forest maintenance and show less influence of the surrounding matrix.
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