october 2017
IJWF – recent cover.

Welcome to the latest preview of the International Journal of Wildland Fire. IJWF content is free to IAWF Members. All journal content can be accessed by IAWF members through the IAWF Members-Only site.

A sampling of research articles includes a blend of physical fire science, fire behavior, fire safety, communications, and community responses to fire preparedness — a cross-section of the range of issues that fire managers and researchers seek to understand.

Abstracts of recent research articles include:

An empirically based approach to defining wildland firefighter safety and survival zone separation distances
Wesley G. Page and Bret W. Butler

Data compiled from reports of firefighter entrapments in the USA were used to build statistically based models of wildland firefighter safety and survival zone separation distance. Model results reinforced the importance of fire shelters and produced predictions of separation distance from flames that in some cases were significantly greater than suggested by physically based models.

Direct estimation of Byram’s fire intensity from infrared remote sensing imagery
Joshua M. Johnston, Martin J. Wooster, Ronan Paugam, Xianli Wang, Timothy J. Lynham and Lynn M. Johnston

Methods for remotely measuring Byram’s fire intensity with infrared cameras are developed. Experimental data are collected to validate the methods. Results suggest it is possible to use infrared imagery to quantify fire intensity without the need for ground sampling.

Downdraft outflows: climatological potential to influence fire behaviour
Brian E. Potter and Jaime R. Hernandez

Several types of wind shifts dangerous to wildland firefighters derive from convective downdrafts and outflows. A climatological summary of the potential for evaporation-driven downdrafts in the continental United States is presented, with discussion of implications for forecasting and operations.

An experimental study on thermal radiation of fire whirl
Pengfei Wang, Naian Liu, Yueling Bai, Linhe Zhang, Kohyu Satoh and Xuanya Liu

Using a unique fire whirl facility made of an air curtain apparatus, the correlation of the flame emissivity of fire whirl with flame diameter was determined by an infrared method for the first time. It was verified that the flame radiation of the fire whirl can be accurately predicted by the multizone flame model with the use of the measured flame emissivity.

Balancing uncertainty and complexity to incorporate fire spread in an eco-hydrological model
Maureen C. Kennedy, Donald McKenzie, Christina Tague and Aubrey L. Dugger

Fire spread is integrated with an eco-hydrological model designed to predict physical and biological watershed dynamics. The challenges of matching the requirements of predicting fire spread with the outputs of a model not designed for fire are evaluated and overcome in model design.

Cultivating a reluctance to simplify: exploring the radio communication context in wildland firefighting
R. Fox, E. Gabor, D. Thomas, J. Ziegler and A. Black

Interviews with fire operations personnel reveal 10 simplifications in official guidance about radio communication. Recommendations are offered for research, practice and training.

Underreporting of wildland fires in the US Fire Reporting System NFIRS: California
David T. Butry and Douglas S. Thomas

This paper examines wildfires reported in the NFIRS database, a primary database for fires in the US, and compares it with the satellite-based MODIS fire detection data and the CAL FIRE FRAP geodatabase to understand underreporting of wildland fires. The paper discusses a series of large wildland fires and uses a Generalised Linear Model to identify the conditions where large wildfires go unreported.

Minority households’ willingness to pay for public and private wildfire risk reduction in Florida
Armando González-Cabán and José J. Sánchez

Wildfires represent a threat to many communities nationwide. Random parameter logit model results suggest that Florida minority homeowners who perceived they live in low- to moderate-risk communities prefer both types of fire mitigation programs. In addition, homeowners who perceived they live in high-risk communities also prefer both the public and private programs, but their WTP values are lower than in low- to moderate-risk communities.