Influence of steam heating on the properties of pine (Pinus pinaster) and eucalypt (Eucalyptus globulus) wood

Spotting is a very important mechanism of forest fire spread. Its negative effect increases in extreme fire danger conditions. In order to predict the maximum spotting distance, the duration of the combustion reaction of potential firebrands should be evaluated. This paper reports the results of an experimental laboratory study of the combustibility of firebrand material (pine cones and scales and pieces of bark of eucalypt) of two representative species in Portugal, Pinus pinaster Ait. and Eucalyptus globulus Labill. The main purpose was to assess the role on the burning conditions of the firebrand particle orientation angle θ in relation to the airflow and of the flow velocity (U) around the particle. Tests were made varying the angle of orientation of the main axis of the particle in relation to incident flow in the range of ±90°; flow velocities were tested from 0 to 6.5 m s–1. After ignition, particle mass loss owing to flaming or glowing combustion of the particle was continuously measured. Residual mass, duration of the flaming phase and the burnout times are reported for each case. Empirical models to estimate the trends of variation of some of these parameters with θ and U are proposed to illustrate their importance for the range of test conditions.

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Modeling extreme values for height distributions in Pinus pinaster, Pinus radiata and Eucalyptus globulus stands in northwestern Spain

iForest - Biogeosciences and Forestry ◽

10.3832/ifor1447-008 ◽

2016 ◽

Vol 9 (1) ◽

pp. 23-29 ◽

Cited By ~ 3

Author(s):

JJ Gorgoso-Varela ◽

JD García-Villabrille ◽

A Rojo-Alboreca

Keyword(s):

Pinus Radiata ◽

Eucalyptus Globulus ◽

Pinus Pinaster ◽

Extreme Values ◽

Northwestern Spain

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Potential and limitation of Trametes versicolor laccase on biodegradation of Eucalyptus globulus and Pinus pinaster kraft pulp

Enzyme and Microbial Technology ◽

10.1016/j.enzmictec.2007.11.016 ◽

2008 ◽

Vol 43 (2) ◽

pp. 144-148 ◽

Cited By ~ 16

Author(s):

Atika Oudia ◽

João Queiroz ◽

Rogério Simões

Keyword(s):

Eucalyptus Globulus ◽

Pinus Pinaster ◽

Trametes Versicolor ◽

Kraft Pulp

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Combined effects of climate, habitat, and disturbance on seedling establishment of Pinus pinaster and Eucalyptus globulus

Plant Ecology ◽

10.1007/s11258-017-0706-1 ◽

2017 ◽

Vol 218 (5) ◽

pp. 501-515 ◽

Cited By ~ 8

Author(s):

Patrícia Fernandes ◽

Cristina Máguas ◽

Otília Correia

Keyword(s):

Seedling Establishment ◽

Eucalyptus Globulus ◽

Pinus Pinaster ◽

Combined Effects

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Time series analysis of the long-term hydrologic impacts of afforestation in the Águeda watershed of north-central Portugal

Hydrology and Earth System Sciences ◽

10.5194/hess-19-3033-2015 ◽

2015 ◽

Vol 19 (7) ◽

pp. 3033-3045 ◽

Cited By ~ 26

Author(s):

D. Hawtree ◽

J. P. Nunes ◽

J. J. Keizer ◽

R. Jacinto ◽

J. Santos ◽

...

Keyword(s):

Land Cover ◽

Soil Properties ◽

Land Cover Change ◽

Eucalyptus Globulus ◽

Pinus Pinaster ◽

Large Scale ◽

Vegetation Types ◽

North Central ◽

Data Record ◽

Hydrologic Impacts

Abstract. The north-central region of Portugal has undergone significant land cover change since the early 1900s, with large-scale replacement of natural vegetation types with plantation forests. This transition consisted of an initial conversion primarily to Pinus pinaster, followed by a secondary transition to Eucalyptus globulus. This land cover change is likely to have altered the hydrologic functioning of this region; however, these potential impacts are not fully understood. To contribute to a better understanding of the potential hydrologic impacts of this land cover change, this study examines the temporal trends in 75 years of data from the Águeda watershed (part of the Vouga Basin) over the period of 1936–2010. A number of hydrometeorological variables were analyzed using a combined Thiel–Sen/Mann–Kendall trend-testing approach, to assess the magnitude and significance of patterns in the observed data. These trend tests indicated that there have been no significant reductions in streamflow over either the entire test period, or during sub-record periods, despite the large-scale afforestation which has occurred. This lack of change in streamflow is attributed to the specific characteristics of the watershed and land cover change. By contrast, a number of significant trends were found for baseflow index, with positive trends in the early data record (primarily during Pinus pinaster afforestation), followed by negative trends later in the data record (primarily during Eucalyptus globulus afforestation). These trends are attributed to land use and vegetation impacts on streamflow generating processes, both due to species differences and to alterations in soil properties (i.e., infiltration capacity, soil water repellency). These results highlight the importance of considering both vegetation types/dynamics and watershed characteristic when assessing hydrologic impacts, in particular with respect to soil properties.

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