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Burning Index (BI) is a number used by the National Oceanic and Atmospheric Administration (NOAA) to describe the potential amount of effort needed to contain a single fire in a particular fuel type within a rating area. The National Fire Danger Rating System (NFDRS) uses a modified version of Bryam's equation for flame length – based on the ...
Actual cubic feet per minute (ACFM) is a unit of volumetric flow. It is commonly used by manufacturers of blowers and compressors. [1] This is the actual gas delivery with reference to inlet conditions, whereas cubic foot per minute (CFM) is an unqualified term and should only be used in general and never accepted as a specific definition without explanation.
NFDRS is a complex set of equations with user-defined constants and measured variables to calculate the daily index and components that can be used for decision support. [3] A Fire Danger Rating level takes into account current and antecedent weather, fuel types, and live and dead fuel moisture. [5]
Cal Fire will begin rolling out new fire-hazard severity maps, which are expected to more than double the land in jurisdictions where the state will apply stricter fire-safety building requirements.
A fire danger index of between 12 and 25 on the index is generally considered a "high" degree of danger, while a day having a danger index of over 50 is considered a "severe" fire danger rating. Above this level in 2010 a distinction was made between forest and grassland fuels.
Fueled by powerful winds and dry conditions, a series of ferocious wildfires erupted last week and roared across the Los Angeles area, destroying hundreds of homes and killing at least 27 people ...
LA fire officials noted progress fighting wildfires ravaging the area, but said there was still "extreme" danger ahead with dry and windy conditions.
Q = Volumetric flow rate of air in cubic feet per minute (cfm) Vol = Space volume L × W × H, in cubic feet; In metric units = where: ACPH = number of air changes per hour; higher values correspond to more ventilation; Q = Volumetric flow rate of air in liters per second (L/s)