Naslov
Equilibrium moisture content of dead fine fuels of pubescent oak (Quercus pubescens Willd.) and holm oak (Quercus ilex L.)

Autori
Bakšić, Nera ; Bakšić, Darko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
III International Conference on Fire Behavior and Risk / Del Guidice, Liliana ; Scarpa, Carla - Alghero, 2022, 159-160

Skup
3rd International Conference on Fire Behaviour and Risk (ICFBR2021)

Mjesto i datum
Alghero, Italija, 03.05.2022. - 06.05.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
dead fine forest fuel, equilibrium moisture content, pubescent oak, holm oak

Sažetak
The moisture content of dead fine forest fuels is a central component of nearly all fire behaviour and fire danger rating systems. For modelling purposes, equilibrium moisture content curves are an important input parameter. When a dead fine fuel is exposed to an environment of constant temperature and relative humidity, its moisture content increases or decreases until it reaches a steady state called the equilibrium moisture content. It is an important characteristic of a dead fine fuel as it defines the end points toward which the moisture content tends. The equilibrium moisture content is a function of fuel temperature, relative humidity and fuel type, as well as on whether the particle has been adsorbing or desorbing moisture. The main objective of this study was to derive equilibrium moisture content curves (isotherms) for dead fine fuels of important Mediterranean oak species, pubescent oak (Quercus pubescens Willd.) and holm oak (Quercus ilex L.). Experimental measurements of twenty litter samples (10 g) per tree species were used for determination of EMC values. Isotermal stepped testing was conducted in the growth chamber through each sorption phase, at 21.1°C, over a range of RH values 20 to 90%, in 10% steps. The equilibrium moisture content curves were obtained using nonlinear least-squares fitting based on the measurements and Van Wagner's model. Both adsorption and desorption measurements followed a typical sigmoid shaped curve. Equilibrium moisture content was an average of 1.5% and 1.1% higher for desorption than adsorption, demonstrating typical hysteresis. The experimental equilibrium moisture content values for pubescent oak litter were within the range of those published for other broadleaves species, while the equilibrium moisture content values for holm oak litter are among those published for conifers.

Izvorni jezik
Engleski

Znanstvena područja
Šumarstvo, Interdisciplinarne biotehničke znanosti

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