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Universidade de Tras os Montes E Alto Douro (2019)

Caracterização espaço temporal e fatores humanos e biofísicos dos incêndios de vegetação em Portugal

Parente, Joana Raquel Mendes Cação

Titre : Caracterização espaço temporal e fatores humanos e biofísicos dos incêndios de vegetação em Portugal Spatial and temporal characterization and the human and biophysical factors of wildfires in Portugal.

Auteur : Parente, Joana Raquel Mendes Cação

Université de soutenance : Universidade de Tras os Montes E Alto Douro

Grade : Doutoramento em Ciências Físicas Ramo de Física apresentada 2019

Résumé partiel
Wildfires are uncontrolled and/or unwanted fires that usually occurred in rural areas or/and rural-urban-interface (RUI), and which normally burn forests, agricultural areas, and wildlands that included scrublands and abandoned agricultural areas. The world wildfire-prone regions range from tropical savannahs to boreal forests characterized by factors and conditions required for fire activity (FA). In fact, such activity increases with primary production and when human and environmental factors are gathered at the same place and time. In the last 20 years, wildfires were the 5th costliest and the 6th most frequent type of disaster in the world. In the same period, Europe experienced a high number of fires (NF) and burnt area (BA) mainly concentrated in the Mediterranean basin. This high fire incidence seems to be the result of human activities including land use/ land cover changes, and climate changes observed. The Mediterranean basin characterized by a fire proneness type of climate and vegetation cover has registered 1,832,161 wildfires events that have burnt 17,377,132 ha between 1980 and 2017. In comparison with the other Mediterranean countries, Portugal has a substantially smaller land area but presents 38% of total NF (TNF) and 26% of total BA (TBA) in that period. The spatial-temporal variability of the wildfires in Portugal is very heterogeneous, and mainly driven by human and biophysical factors. The main focus of this thesis is to study this spatial - temporal variability and their drivers. With this objective in mind, it was performed an identification and a thorough characterization of the spatial variability of fire incidence as well as its main drivers, in particular for different fire causes

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