 Keetch–Byram drought index

The Keetch–Byram Drought Index (KBDI) is a numerical index used to measure soil moisture and drought conditions, particularly in forested areas. It was developed by researchers John Keetch and Charles Byram in the 1960s and is specifically designed to provide a useful tool for fire management and prevention by assessing the dryness of forest fuels. The KBDI is calculated based on the amount of precipitation and soil moisture at various depths.