Drach K. Dynamics of fires in grass ecosystems

The dissertation is devoted to solving the actual scientific and technical problem revealing the dynamics of development and cessation of fires occurred in grass ecosystems. The object of research is the dynamics of the processes of occurrence, spread and cessation of fires in grass ecosystems. The subject of research is natural and weather-climatic factors influencing the fire hazard of combustible material of grass ecosystems, the processes of occurrence, spread of grass fires and their stopping. For the first time, the fire-hazardous properties of each plant were studied, including the dynamics of humidity change during drying, equilibrium humidity, temperature of smothering, ignition and spontaneous combustion, ignition time, ash content and smoke formation coefficients under smother and flame combustion. Studies of these properties were performed within 5 days after collection of plant samples under natural conditions and during natural drying in the laboratory. The smother, ignition and spontaneous combustion temperatures of each of the studied plants are different and decrease with decreasing humidity.