Principais causas dos incêndios florestais em Portugal: variação espacial no período 2001/12

Nunes, Adélia; Lourenço, Luciano; Fernandes, Sofia; Castro, A C Meira

doi:10.14195/1647-7723_21_11

Cited by 11 publications

(10 citation statements)

References 27 publications

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“…In fact, in Portugal, wildfires are mainly caused by human negligence or human intent (arson and deliberate incendiarism). These results were highlighted by several authors [11,24,30,36,37], who found that around 97% of investigated fires are human-caused. Moreover, significant spatial contrast was detected in the number and causes of wildfires.…”

Section: Spatial Temporal Occurrence By Type and Motivationmentioning

confidence: 73%

Mapping the Causes of Forest Fires in Portugal by Clustering Analysis

et al. 2020

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This paper presents a spatial characterization of the distribution at district level of the forest fire events that occurred in mainland Portugal between 1996 and 2015 and whose causes were investigated. We further examine the breakdown of the causes of these forest fires over this period. Results supported by relevant validated statistics show that of the total fire events recorded, 94.4% were identified as an effective occurrence, of which 22.2% had burned an area greater than 1 ha, and of these only 42.1% were investigated. False alarms or fires without a recorded burning area are more significant in the districts of Aveiro, Lisbon and Porto, the biggest municipalities. Of the fires whose causes were investigated, the largest number of recorded events were in NE regions (49.0%), followed by NW regions (41.7%), and finally in the rest of the country (9.3%). Taking into account the ratio between the investigated fires and the total number of fires and the behavior profile produced for cluster analysis, a different panorama is brought to light, with the center and south regions showing greater effort to investigate the fires. A thorough analysis of the causes and motivations of the ignition of these forest fire occurrences showed that human activity, either deliberate (20.4%) or negligent (29.9%), outweigh natural phenomena (0.6%). Reactivations (14.6%) and Unknown (34.5%) causes decreased as time passed, whereas negligent and deliberate causes increased. However, these results could change if the percentage of unknown information in relation to the origin of the forest fires is considerable. The outcome of this research will support an efficient management related to fire mitigation and suppression including establishing preventive actions to reduce the occurrence of forest fires and emphasize the need to improve the procedure for recording forest fire events in Portugal, especially in relation to identifying their cause.

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Section: Spatial Temporal Occurrence By Type and Motivationmentioning

confidence: 73%

Mapping the Causes of Forest Fires in Portugal by Clustering Analysis

et al. 2020

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“…The major cause of fires in Ayllón was lightning, followed by accidental ignition related with agriculture, according to the Spanish national forest fire database. Fire causes related with agriculture activities in both massifs are not surprising, because previous studies have shown this cause as the most frequent in rural areas in Spain and in Portugal [100][101][102][103], as it is also investigated the high rate of fire by lightning in the Northern west area of the Ayllón massif [104,105]. It is, however, interesting, that fire activity has developed along such distinct paths in the two massifs, with Estrela having a much higher number of fires and area burned.…”

Section: Fire and Land Use/land Cover Are Relatedmentioning

confidence: 99%

Half-Century Changes in LULC and Fire in Two Iberian Inner Mountain Areas

Sequeira

Rego

Molina

et al. 2019

Fire

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Wildfires in the Iberian Peninsula were large and frequent in the second half of the 20th century. Land use and land cover (LULC) also changed greatly. Our aim was to understand the relationship between LULC and fire in the western and eastern ends of the Iberian Central Mountain System. We compared two case study landscapes, the Estrela massif and the Ayllón massif, which are biophysically similar but with different social-ecological contexts. In both, fires were in general more likely in shrublands and pastures than in forests. Shrublands replaced forests after fires. Contrasting LULC in the two massifs, particularly pastures, likely explained the differences in fire occurrence, and reflected different regional land use policies and history. Fire here is a social-ecological system, influenced by specific LULC and with implications from landscape to regional scales. Understanding how LULC changes interact with fire is powerful for improving landscape and regional planning.

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“…Dans tout le bassin méditerranéen le nombre le plus élevé d'incendies sont de causes inconnues (Alexandrian et al, 1999) particulièrement au Portugal (Lourenço, 2013 ;Nunes et al, 2014) Tableau Vi -Variation régionale des surfaces incendiées en Algérie. Tableau Viii -Variation des surfaces brûlées par type de végétation.…”

Section: Les Causes Des Incendiesunclassified

L’Algerie: une region mediterraneene tres sensible aux incendies de foret

Souidi

Hadj

2017

TER

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A navegação consulta e descarregamento dos títulos inseridos nas Bibliotecas Digitais UC Digitalis, UC Pombalina e UC Impactum, pressupõem a aceitação plena e sem reservas dos Termos e Condições de Uso destas Bibliotecas Digitais, disponíveis em https://digitalis.uc.pt/pt-pt/termos.Conforme exposto nos referidos Termos e Condições de Uso, o descarregamento de títulos de acesso restrito requer uma licença válida de autorização devendo o utilizador aceder ao(s) documento(s) a partir de um endereço de IP da instituição detentora da supramencionada licença.Ao utilizador é apenas permitido o descarregamento para uso pessoal, pelo que o emprego do(s) título(s) descarregado(s) para outro fim, designadamente comercial, carece de autorização do respetivo autor ou editor da obra.Na medida em que todas as obras da UC Digitalis se encontram protegidas pelo Código do Direito de Autor e Direitos Conexos e demais legislação aplicável, toda a cópia, parcial ou total, deste documento, nos casos em que é legalmente admitida, deverá conter ou fazer-se acompanhar por este aviso. L'Algerie: une region mediterraneene tres sensible aux incendies de foret Autor(es):Zahira, Souidi; Hadj, Benbakar Mots-clé:Forêt méditerranéenne, incendie, causes, prévention, Algérie. aBSTRacTAs in many other Mediterranean countries, the forested areas in Algeria are subject to a recurrent risk of forest fires that is favored by the extreme flammability of the Mediterranean forest species during the summer. This paper tries to clarify the evolution and the causes of forest fire in Algeria and to give an overview of the efforts undertaken at national level for reduce the forest fire risk.Keywords: Forest fire, risk, Mediterranean country, Algeria. RESUMO Argélia: uma região do Mediterrâneo muito sensível a incêndios florestais -como em muitos países do Mediterrâneo,as florestas da Argélia estão sujeitas a um risco recorrente de incêndios florestais, o qual é favorecido durante o verão pela extrema inflamabilidade das espécies florestais mediterrâneas. Este trabalho tenta esclarecer as tendências e as causas dos incêndios florestais na Argélia e procura fornecer uma visão geral dos esforços desenvolvidos a nível nacional para reduzir o risco de incêndio.Palavras-chave: Floresta mediterrânea, incêndios florestais, causas, prevenção, Argélia. RESUMEnArgelia: Una región mediterránea muy sensible a los incendios forestales -Al igual que en muchos países mediterráneos, los bosques de Argelia están sujetos a un riesgo recurrente de los incendios forestales, que se ve favorecido durante el verano por la extrema inflamabilidad de las especies forestales mediterráneas. En este trabajo se intenta aclarar las tendencias y las causas de los incendios forestales en Argelia, así como proporcionar una visión general de los esfuerzos realizados a nivel nacional para reducir el riesgo de incendio.Palabras clave: Bosque mediterráneo, incendios forestales, causas, prevención, Argelia.

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Principais causas dos incêndios florestais em Portugal: variação espacial no período 2001/12

Cited by 11 publications

References 27 publications

Mapping the Causes of Forest Fires in Portugal by Clustering Analysis

Mapping the Causes of Forest Fires in Portugal by Clustering Analysis

Half-Century Changes in LULC and Fire in Two Iberian Inner Mountain Areas

L’Algerie: une region mediterraneene tres sensible aux incendies de foret

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