Efficiency of fire risk indices for Pantanal Sul-mato-grossense/ Eficiencia de indices de risco de incendios para o Pantanal Sul-mato-grossense

The objective of this work was to compare the indices of fire risk from hotspots and define the most efficient for the conditions of South Pantanal of Mato Grosso, based on meteorological data and number of hotspots. The work consisted of correlation analysis between some meteorological variables an...

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Bibliographic Details
Published inCiência florestal p. 809
Main Authors Soriano, Balbina Maria Araujo, Daniel, Omar, Santos, Sandra Aparecida
Format Journal Article
LanguageSpanish
Published Universidade Federal de Santa Maria 01.10.2015
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Summary:The objective of this work was to compare the indices of fire risk from hotspots and define the most efficient for the conditions of South Pantanal of Mato Grosso, based on meteorological data and number of hotspots. The work consisted of correlation analysis between some meteorological variables and the occurrence of hotspots as well as the comparison between the fire risk indices of Angstron (B), Logarithmic index of Telicyn (I), Nesterov Index (G), Monte Alegre Index (FMA) and Modified Monte Alegre Index ([FMA.sup.+]). Meteorological data were collected at 14 hours in the Nhumirim climatological station and hotspots during night of the NOAA12 and NOAA15 from 1999 to 2008. The wind speed and relative humidity were the meteorological variables which best correlated with the occurrence of fire. To detect any degree of fire risk, the FMA, the G and [FMA.sup.+] were the most efficient indices. For the detection of degrees of fire risk classes very high and high, the G was the most efficient, followed by the FMA. Considering the high probability of success in detecting fire risks in any degree and also in the class of the most high risk, the FMA can be deemed more appropriate for estimating the fire risk for Nhecolandia sub- region. Keywords: Monte Alegre index; forest fires; hotspots; meteorological variables. O objetivo deste trabalho foi comparar os indices de risco de incendios a partir de focos de calor e definir o mais eficiente para as condicoes do Pantanal Sul-mato-grossense, com base em dados meteorologicos e numero de focos de calor. O trabalho consistiu na analise de correlacao entre variaveis meteorologicas e a ocorrencia dos focos de calor, bem como a comparacao entre os indices de risco de incendios: Angstron (B), Telicyn (I), Nesterov (G), Monte Alegre (FMA) e Monte Alegre Modificada ([FMA.sup.+]). Foram utilizados dados meteorologicos coletados as 14 horas na estacao Climatologica Principal de Nhumirim e de focos de calor da passagem noturna do NOAA (12 e 15), no periodo de 1999 a 2008. A velocidade do vento e a umidade relativa do ar foram as variaveis meteorologicas que apresentaram maior correlacao com a ocorrencia de focos de calor. Para deteccao de qualquer grau de risco de incendio, a FMA, o G e a [FMA.sup.+] foram os indices mais eficientes. Para a deteccao de graus de risco de incendio nas classes Muito alto e Alto, o G foi o mais eficiente, seguido da FMA. Considerando a alta probabilidade de acerto na deteccao de riscos de incendio em qualquer grau e tambem nas classes de Alto risco a mais, a FMA pode ser considerada a mais adequada para estimar o risco de ocorrencia de incendios para a sub- regiao da Nhecolandia. Palavras-chave: formula de Monte Alegre; queimada; focos de calor; variaveis meteorologicas.
ISSN:1980-5098
1980-5098