Fire risk map for the Serra de São Domingos Municipal Park, Poços de Caldas, MG

Abstract

This study constructed a fi re risk map for the Serra de São Domingos Municipal Park (SSDMP), southern Minas Gerais Sate, Brazil, which harbors Atlantic Forest remnants and endangered species. Geo-processing techniques were used for producing a preliminary risk map for altimetry (a), land slope (e), slope orientation (d), land-use/cover (u) and infl uence of roads and buildings (i). After, the risk maps were overlaid to produce a structural fi re index (SFI)-based risk map for the Park. The SFI was calculated by using the formula SFI = 0,35i + 0,30u + 0,15d + 0,10a + 0,10e. The risks classes were classifi ed as low (0.0-0.9), moderate (1.0- 1.9), high (2.0-2.9), very high (3.0-3.9) and extreme (4.0-5.0). All data were processed with 2.5 m base spatial resolution by using the ArcView GIS. According to the SFI calculated, the SSMP area can be divided into the following fi re risk zones: Low (0.93%), Moderate (61.77%), High (31.32%), Very High (4.79%) and Extreme (1.19%). The main risk factor is due to the infl uence of roads and buildings and most fi res start due to anthropogenic causes. The low and moderate risk classes comprehend most of the rainforest area. Clearings and grasslands fi t mainly the High risk class. The most vulnerable area of SSDMP was the Northern area bordering pasture, crops and eucalypt fi elds. The SFI map can be a valuable tool for elaborating a fi re prevention plan in a small conservation unit when few climate and fi re occurrence data are available.