Fire Dangerous Properties of the Most Common Plants of Grass Ecosystems in Ukraine
Kostiantyn L. Drach, Andriy D. Kuzyk, Volodymyr I. Tovarianskyi*, Serhii O. Yemelianenko
Lviv State University of Life Safety, 35, Kleparivska Street, 79000 Lviv, UKRAINE
*Corresponding author: firstname.lastname@example.org
Abstract. The impact of grass fires on environment and grass ecosystems is mainly negative. The fire hazard of herbaceous plants causes the occurrence and spread of fires in herbaceous ecosystems. Various indicators, in particular the humidity of the combustible material, the self- ignition temperature, etc., can estimate it. These indicators depend on the type of plants and the natural conditions that determine the properties of the combustible materials. The goal of the research is to determine the fire hazard indicators of five the most widespread herbaceous plants in Ukrainian ecosystems (Festuca arundinacea, Festuca pratensis, Elymus repens, Phleum pretense and Trifolium arvense) and to substantiate these indicators due to results of thermogravimetric analysis and values of absolute humidity and self-ignition temperature. Within 5 days, the absolute humidity of the samples as well as the self-ignition temperature were determined by weight method and using the ОТР testing device. Complex thermal analysis of samples was also perform using a Q-1500D derivatograph. The results of the research show that absolute humidity and self- ignition temperature of certain types of plants specify differences in their fire-fighting properties. According to the results of complex thermal analysis for each plant species, three stages occur at different temperatures: evaporation of free and bound water, self-ignition of samples and combustion of carbonized residue. The maximum exothermic effect for each plant was characterized by different value of temperature, as well as ash residue, which impedes the combustion process.
Key words: Herbaceous ecosystem, fire hazard, absolute humidity, self-ignition temperature, thermal analysis, ash content.
Ecologia Balkanica, 2020, Volume 12, Issue 1 pp. 147-154
Article № eb.20123 [Full text - PDF]