Evaluation of the flammability of gorse (Ulex europaeus L.) managed by prescribed burning
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The abandonment of rural areas has led to an increase of the fire-prone European gorse (Ulex europaeus L.) communities in some regions, where prescribed burning is a technique applied to control them. Understanding flammability changes after treatments is crucial for the sustainable use of fire.
The objectives of this study were to evaluate (1) any differences in the flammability of gorse plant parts 1 and 5 years after burning and (2) the flammability of whole plants, assessing complementarities of the results between full-scale and bench-scale tests.
Results showed the importance of the effect of the different scales and types of methods used to determine the four components of flammability of forest fuels: (1) Ignitability was highly dependent on the type of ignition source. (2) Combustibility was more dependent on the dead fraction than on live plant part characteristics. (3) Sustainability was mainly related to physical characteristics, like air flow interaction with fuel compactness. (4) Consumability, in terms of residual mass fraction, was similar at both scales.
The results suggest the need for intensive management of gorse shrubland to maintain them at a very young age in order to reduce flammability associated with the rapid physiological and structural changes in this kind of vegetation.
KeywordsFlammability Ulex europaeus Prescribed burning Full-scale testing Bench-scale testing Mass loss calorimeter
- Babrauskas V (2002) The cone calorimeter. In: Society of fire Protection Engineering (ed), SFPE Handbook of Fire Protection Engineering, 3rd edition. National Fire Protection Association, Quincy, Massachusetts, pp 3-63 – 3-81Google Scholar
- Doran JD, Randall CK, Long AJ (2004) Fire in the wildland–urban interface: selecting and maintaining firewise plants for landscaping. University of Florida, Institute of Food and Agricultural Services, Florida Cooperative Extension Service Circular 1445, Gainesville, FLGoogle Scholar
- Enninful EK, Torvi DA (2005) Effect of moisture on heat release and smoke production of vegetation. Proceedings of the Spring Technical Meeting, the Combustion Institute Canadian Section, Halifax, NS, 16–18 MayGoogle Scholar
- Hoshovsky M (1989) Element stewardship abstract for Ulex europaeus gorse. The Nature Conservancy, TNC-ESA, ArlingtonGoogle Scholar
- International Organization for Standardization (1995) Determination of the heat of combustion (calorific value) (ISO 1716). International Organization for Standardization, GenevaGoogle Scholar
- Madrigal J, Villanueva S, Hernando C, Guijarro M, Díez C, Martínez I, Marino E, Barrio A, López M, Mordillo I (2010) Estimation of heat release rate of forest fuels during rapid flaming combustion: comparison between cone calorimeter and mass loss calorimeter devices. Proceedings of the 6th International Conference on Forest Fire Research, ADAI, University of Coimbra, Coimbra, Portugal, 15–18 NovemberGoogle Scholar
- Martin RE, Gordon DA, Gutierrez MA, Lee DS, Molina DE, Schroeder RA, Sapsis DB, Stephens SL, Chambers M (1994) Assessing the flammability of domestic and wildland vegetation. Proceedings of the 12th Conference on Fire and Forest Meteorology, Society of American Foresters, Bethesda, MD, Jekyll Island, GA, 26–28 October, pp 130–137Google Scholar
- Pereiras J, Casal M (2002) Dynamics of an Ulex shrubland community subjected to prescribed burning. In: Trabaud L, Prodon R (eds) Fire and biological processes. Blackhuys, Leiden, pp 43–56Google Scholar
- White RH (1987) Effect of lignin content and extractives on the higher heating value of wood. Wood Fiber Sci 19:446–452Google Scholar