Simulação do comportamento do fogo em cultivo de Eucalypyus urograndis (Clone H13)

Alves, Leandro Procópio; Souza, Adilson Pacheco de; Casavecchia, Bruno; Dias, Thaíse; Borella, Daniela; Ferneda, Brena Geliane; Martim, Charles Campoe

doi:10.14393/sn-v30n3-2018-3

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“…The available fuel material was characterized by random collection of samples of 1.0 m², at most 3.0 m from the subplots, on the same planting line and on the same day as the controlled burning, with one sample per subplot. The average thickness of the combustible material layer (litter) was obtained, with subsequent separation of the plant partitions in the classes: i) dead (dry) combustible material: leaves, barks, thin branches with diameter (d) <0.7 cm and branches mean 0.7 ≤ d ≤ 2.5 cm; and ii) live (moist) combustible material composed of herbaceous and grassy plants (ALVES et al, 2017;ALVES et al, 2018). The classes of the combustible material were weighed in the fi eld to obtain the fresh wet mass.…”

Section: Methodsmentioning

confidence: 99%

Effectiveness of Water-Retaining Polymer as Fire Retardant in Indirect Use

et al. 2020

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The use of fire retardants increases efficiency in fighting forest fires, however, it still presents uncertainties regarding environmental contamination, recommendations for preparation, and it lack of regulation in Brazil. In this scenario, alternative products such as water-retaining polymers, that can reduce the rapid evaporation of water, can also have positive effects in terms of reducing fire behavior. Efficiency and ways of using the water-retaining polymer as a short-duration fire retardant (indirect combat) in controlled burns in eucalyptus plantations were evaluated. Five concentrations (dilution in water), three volumes of spray solution, and two post-application times on the combustible material available in the area were evaluated. Controlled burns were conducted downwind, between 10 am and 2 pm, during dry season in the region, with micrometeorological and fire behavior assessments (fire propagation speed and length of flames). Increased spray volume and concentration of water-retaining polymer led to reductions in the spread of fire. In eucalyptus combustible material, the water-retaining polymer can be used as a fire retardant of short duration (effective up to two hours after application), considering a spray volume of 2.0 L m-2 and concentration of 0.0060% (diluted in water).

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Section: Methodsmentioning

confidence: 99%