Rapid Assessment of Vegetation Condition After Wildfire
The USDA Forest Service Rapid Assessment of Vegetation Condition after Wildfire (RAVG) program produces data estimating post-fire vegetation conditions on National Forest System (NFS) lands, including the composite burn index (CBI), percent basal area loss and percent canopy cover loss. These data products support a data-driven process to inform prioritization and funding decisions for post-fire reforestation efforts. The USGS conducts similar assessments for fires on forested DOI lands.
30 – 45 days after fire containment for most fires (exceptions due to seasonal effects are common)
The primary audience for RAVG data and products is the silviculture community, which needs to communicate yearly reforestation and restoration needs in support of funding requests. Other applications include post-fire habitat assessments and salvage planning.
RAVG burn metrics are created by regression modeling based on hundreds of field plots.
- Pre- and post-fire satellite imagery
- Burn area boundary shapefile
- Differenced Normalized Burn Ratio (dNBR) and Relativized dNBR (continuous)
- Burn Severity layer (Composite Burn Index)
- % Change in Basal area layer
- % Change in Canopy cover layer
- Summary table
- Visualization products