Examining socioeconomic factors associated with wildfire occurrence and burned area in Galicia (Spain) using spatial and temporal data

Abstract

BackgroundThe Spanish region of Galicia is one of the most fire-prone areas in Europe. Most wildfires are directly or indirectly related to human activities, suggesting that socioeconomic factors likely can inform wildfire management. Socioeconomic factors, for example, could help explain the causes and distribution of wildfires spatially and temporally within the region. We sought to examine how socioeconomic and biophysical variables and their fluctuations over time (2000–2015) might influence wildfire ignitions and hectares burned in Galicia using municipality-level data describing socioeconomic factors and forest land wildfires.ResultsWe used cluster analysis to characterize socioeconomic variation in our data set and regression analysis of panel data to investigate jointly the temporal and spatial dimensions of correlation between socioeconomic factors and wildfires. Using cluster analysis, we divided the region inter-territorially according to socioeconomic characteristics. Clustering divisions were found to have a similar pattern to that of Galician provinces. Our regression models for each cluster indicate that several socioeconomic factors are at least correlated with and may tend to influence wildfire occurrence and burned area in Galicia. We also found discernible patterns related to our identified clusters, confirming that differences between territories exist regarding the likely influence of socioeconomic factors on the number of wildfire ignitions and hectares burned.ConclusionsResults suggest that socioeconomic factors are as crucial as meteorological variables for understanding wildfire ignitions and burned area in Galicia (Spain). Accurate knowledge of inter-territorial socioeconomic differences could help public officials and forest managers to design wildfire prevention policies best suited to the socioeconomic, cultural, and environmental circumstances of each territory.