For mobile, landscape view is recommended.
Predicting and managing burns of live fuels is critical to effectively supporting Department of Defense (DoD) missions. Most fires, whether prescribed or wildland, propagate through living fuels or mixtures of live and dead fuels. Ironically, the majority of fire studies and models have focused on burning of dead fuels. This discrepancy is significant because the fire behavior of live and dead fuels can vastly differ. Moreover, the (limited) prior studies of live fuels have typically assumed that natural fuels are thermally thin (i.e., isothermal). This is now recognized as inaccurate and has significant implications to how live fuels burn. Thus, there is a critical need to gain knowledge and develop modeling tools which are applicable to live fuels of varying thermal thicknesses. With this background the overall goal of this effort is to strengthen the fire community’s ability to more accurately model fire spread and fuel consumption of live fuels.
The following specific objectives will be accomplished to enable achieving the overall goal:
Coupled laboratory, modeling, and field studies will be used to address the objectives of this effort and to help achieve the overall goal. Thrust 1 will focus on identifying key physical and chemical processes that cause ignition and fire spread behavior to differ between live and dead fuels using laboratory and field studies. This will be accomplished using a suite of laboratory (e.g., infrared camera, laser diagnostic, fourier-transform infrared [FTIR]) and detailed computational studies that will be deployed to systematically identify key parameters controlling ignition and burning behavior. Field studies will be used to augment the laboratory experiments and provide data for relevant conditions. Thrust 2 will improve models to predict fuel consumption in live fuels (in contrast to models which were designed for dead fuels). A semi-empirical fire consumption model will be created (and evaluated) that can be used by fire managers.
Anticipated benefits to the DoD are as follows.