ENERGY RELEASE COMPONENT (ERC) AND FUEL MOISTURE GRAPHS
Energy Release Component (ERC) Charts
What is the Energy Release Component (ERC)?
The Energy Release Component (ERC) is based on the estimated potential available energy released per unit area in the flaming front of a fire. The day-to-day variations of the ERC are caused by changes in the moisture contents of the various fuel classes, including the 1,000 hour timelag class.
The ERC is derived from predictions of
100-Hr Time Lag Fuel Moisture
1000-Hr Time Lag Fuel Moisture
What is the Fuel Moisture Content?
The water content of a fuel particle expresed as a percent of the ovendry weight of the fuel particle.
What is the Time Lag?
The time necessary for a fuel particle to lose approximately 63 percent of the difference between its initial moisture content and its equilibrium moisture content.
What is the 100 & 1000-Hr Timelag Fuels measuring?
These fuels are used to estimate the slowly changing fuel moisture contents of the large fuel classes. Daily weather fluctuations have only a small impact on the moisture content of these fuels (especially the 1000-Hr), so they provide an estimate of slowly changing seasonal moisture trends.