International Journal of Wildland Fire International Journal of Wildland Fire Society
Journal of the International Association of Wildland Fire
International Journal of Wildland Fire

International Journal of Wildland Fire

Volume 20 Number 6 2011

WF09131 Prescribed burning: how can it work to conserve the things we value?

T. D. Penman, F. J. Christie, A. N. Andersen, R. A. Bradstock, G. J. Cary, M. K. Henderson, O. Price, C. Tran, G. M. Wardle, R. J. Williams and A. York
pp. 721-733

Prescribed burning, or the deliberate application of fire, is a commonly used management tool worldwide. Studies show that prescribed burning may improve control of wildfires, but has less value in affecting the extent of area affected by wildfires. There is insufficient information relating to the costs and benefits of prescribed fire for biodiversity. We identify issues that need to be addressed to improve management of prescribed burning programs.

The obstruction of ambient winds and the possible existence of indrafts downwind of a wildfire is one aspect of coupled fire–atmosphere interaction influencing the effectiveness of backfiring. Three-dimensional simulations of heading fires and backfires in surface fuels suggest that these influences are quite sensitive to environmental conditions.

WF10010 Tree mortality and snag dynamics in North American boreal tree species after a wildfire: a long-term study

Virginie A. Angers, Sylvie Gauthier, Pierre Drapeau, Karelle Jayen and Yves Bergeron
pp. 751-763

Post-fire tree mortality was concentrated in the first 2 years following fire but continued to occur over 10 years. The time snags stood after fire and factors influencing their persistence were species-specific. These multiscaled factors included diameter, fire severity, stand basal area and salvage logging in the vicinity. Tree fall pattern also differed among species.

We evaluated characteristics of fuel breaks that influenced the behaviour of large fires and mapped where fires and fuel breaks most commonly intersect. Fuel breaks were most effective when they provided access for firefighting activities, and most fires intersect fuel breaks in historically fire-prone areas.

This study developed methods to integrate artificial neural network models with geographic information system tools and produced a prototype forest-fire susceptibility map for the Central Portugal administrative area.

WF10032 Influences of forest roads on the spatial pattern of wildfire boundaries

Ganapathy Narayanaraj and Michael C. Wimberly
pp. 792-803

We investigated the influences of forest roads on wildfire cessation. The locations of wildfire boundaries were influenced by multiple topographic and vegetation constraints, but forest roads tend to have largest influence. We interpreted these results as evidence that roads provide accessibility for more effective firefighting and act as physical barriers to fire spread

WF10069 A simple method for field-based grassland curing assessment

Stuart A. J. Anderson, Wendy R. Anderson, Jennifer J. Hollis and Elizabeth J. Botha
pp. 804-814

A method was developed to determine degree of grassland curing in the field. It is a less subjective method than visual observations, and is easily carried out by operational personnel. This method also provides important field data to assist in the development of new techniques for grass curing assessment and accurate determination of fire danger potential in grasslands.

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