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Abstract

The goal of this paper is to characterize the spatial variability in burn severity of a wildfire in an oak savannah within the wildland-urban interface in Worcester, Massachusetts using the Composite Burn Index (CBI). This work compares two interpolated surfaces of burn severity values collected in a March 2012 burn area and examines the statistical relationship between burn severity (CBI), fuel type and topography. The wildfire burned at low-to-medium severity (0.1 – 2.0 CBI). Burn severity was highest in mixed grass and shrub fuels beneath oak canopy cover (mean 1.11 CBI), followed by open-canopy shrub fuels (mean 1.09 CBI) and then open-canopy grass fuels (mean 1.06 CBI). Burn severity was negatively correlated with elevation (r2 = -0.22) and slope (r2 = -0.04). These results, coupled with recently acquired historical fire records, presents the first comprehensive fire analysis of the site and indicates the need for a burn and fuel reduction program

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