10000-hour timelag

adj. Of or pertaining to a dead fuel particle with a timelag of 10,000 hours.  


  • Discussion


Fuel particle timelag is based on the amount of time necessary to lose or gain 63 percent of the difference between the initial moisture content and the equilibrium moisture content at a constant temperature and relative humidity. A 10,000-hour timelag fuel particle has a very low surface-area-to-volume ratio and therefore adjusts very slowly to changes in equilibrium moisture content.  




Dead fuel particles greater than eight inches in diameter are considered to have a 10,000-hour timelag (a little greater than one year). This size class of fuel particle is only rarely characterized in a fuel inventory.  In most published fuel load summaries, dead fuel particles greater than three inches diameter are lumped into one class and considered to have a 1,000-hour timelag (42 days).