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Displaying 161 - 180 of 960

A detailed description is given of double burner fire whirls that are similar in structure to the type of combined whirls seen in nature. The whirls are generated using the fixed frame method, and two burners are placed symmetrically about the…
Author(s): Katherine A. Hartl, Alexander J. Smits
Year Published:

A microscale wildfire model, QES-Fire, that dynamically couples the fire front to microscale winds was developed using a simplified physics rate of spread (ROS) model, a kinematic plume-rise model and a mass-consistent wind solver. The model is…
Author(s): Matt Moody, Jeremy A. Gibbs, Steven K. Krueger, Derek V. Mallia, Eric Pardyjak, Adam K. Kochanski, Brian N. Bailey, Rob Stoll
Year Published:

The suggestion has been made within the wildland fire community that the rate of spread in the upper portion of the fire danger spectrum is largely independent of the physical fuel characteristics in certain forest ecosystem types. Our review and…
Author(s): Miguel G. Cruz, Martin E. Alexander, Paulo M. Fernandes
Year Published:

Fire behavior and intensity vary within and between fires, mediated by factors such as slope, aspect, elevation, fuel loading and vegetation type. These influences create a mosaic of burn severity, shaping forests around the world. These burn…
Author(s): Brooke R. Saari
Year Published:

This work experimentally investigates the fire spread of discrete fuels by using fuel beds of laser-cut cardboards in a wind tunnel. Two distinct particle ignition modes are identified: under lower wind speed and packing ratio, a part of the tilted…
Author(s): Qianqian He, Naian Liu, Xiaodong Xie, Linhe Zhang, Jaio Lei, Yang Zhang, Di Wu
Year Published:

Wildfires often exhibit complex and dynamic behaviour arising from interactions between the fire and surrounding environment that can create a rapid fire advance and result in loss of containment and critical fire safety concerns. A series of…
Author(s): Carlos Ribeiro, Luís Carlos Duarte Reis, Jorge R. Raposo, André Rodrigues, Domingos Xavier Viegas, J. Sharples
Year Published:

Firebrand spotting is a potential threat to people and infrastructure, which is difficult to predict and becomes more significant when the size of a fire and intensity increases. To conduct realistic physics-based modeling with firebrand transport,…
Author(s): Amila Wickramasinghe, Nazmul Khan, K. A. M. Moinuddin
Year Published:

Wildfires burn annually across the United States (US), which threaten those in close proximity to them. Due to drastic alterations of soil properties and to the land surfaces by these fires, risks of flash floods, debris flows, and severe erosion…
Author(s): Jorge A. Duarte, Andrés D. González, Jonathan J. Gourley
Year Published:

Forests are currently a substantial carbon sink globally. Many climate change mitigation strategies leverage forest preservation and expansion, but rely on forests storing carbon for decades to centuries. Yet climate-driven disturbances pose…
Author(s): Oriana S. Chegwidden, Grayson Badgley, Anna T. Trugman, William R.L. Anderegg, Danny Cullenward, John T. Abatzoglou, Jeffrey A. Hicke, Jeremy Freeman, Joseph J. Hamman
Year Published:

Anthropogenic climate change is expected to cause an increase in fire danger over south-eastern Australia during the 21st century, primarily driven by increased surface temperature. Studies of future fire weather in Victoria, Australia, have so far…
Author(s): Scott Clark, Graham A. Mills, Timothy J. Brown, Sarah Harris, John T. Abatzoglou
Year Published:

As global warming continues, wildland lightning fires have exhibited an increasing trend. The phenomenon of lightning ignition and a model are urgent research fields. In this study, an impulse current generator was used to study artificial lightning…
Author(s): Junwei Feng, Hao Shen, Dong Liang
Year Published:

In the near future, a higher occurrence of wildfires is expected due to climate change, carrying social, environmental, and economic implications. Such impacts are often associated with an increase of post‐fire hydrological and erosive responses,…
Author(s): Ana Rita Lopes, Antonio Girona-García, Sofia Corticeiro, Ricardo Martins, Jan J. Keizer
Year Published:

Daily, fine-scale spatially explicit wildland fire occurrence prediction (FOP) models can inform fire management decisions. Many different data-driven modelling methods have been used for FOP. Several studies use multiple modelling methods to…
Author(s): Nathan Phelps, Douglas G. Woolford
Year Published:

Human and natural disturbances are key drivers of change in forest ecosystems. Yet, the direct and indirect mechanisms which underpin these changes remain poorly understood at the ecosystem level. Here, using structural equation modelling across a…
Author(s): Elle J. Bowd, Sam C. Banks, Andrew Bissett, Tom W. May, David B. Lindenmayer
Year Published:

Wildland fire management decision-makers need to quickly understand large amounts of quantitative information under stressful conditions. Categorization and visualization 'schemes' have long been used to help, but how they are done affects the speed…
Author(s): Den Boychuk, Colin B. McFayden, Douglas G. Woolford, B. Mike Wotton, Aaron Stacey, Jordan Evens, Chelene C. Krezek-Hanes, Melanie J. Wheatley
Year Published:

The effectiveness of a fuelbreak, created in a homogeneous grassland on a flat terrain, was studied numerically. The analysis relies on 3D numerical simulations that were performed using a detailed physical-fire-model (FIRESTAR3D) based on a…
Author(s): N. Frangieh, Gilbert Accary, Jean Louis Rossi, D. Morvan, Sofiane Meradji, Thierry Marcelli, François Joseph Chatelon
Year Published:

Improving the accuracy of fire behavior prediction requires better understanding of live fuel, the dominant component of tree crowns, which dictates the consumption and energy release of the crown fire flame-front. Live fuel flammability is not well…
Author(s): Oleg M. Melnik, Stephen A. Paskaluk, Mark Y. Ackerman, Katharine O. Melnik, Dan K. Thompson, Sara S. McAllister, Michael D. Flannigan
Year Published:

Wildfires were a frequent source of disturbance in forests of the Western United States prior to Euro-American settlement. Following a series of catastrophic wildfires in the Northern Rockies in 1910, the U.S. Forest Service adopted a broad wildfire…
Author(s): Andrea Watts, Frederick C. Meinzer, Thomas A. Spies, Andrew G. Merschel, Steven L. Voelker
Year Published:

Scarcity in wildland fire progression data as well as considerable uncertainties in forecasts demand improved methods to monitor fire spread in real time. However, there exists at present no scalable solution to acquire consistent information about…
Author(s): Nicholas McCarthy, Ali Tohidi, Yawar Aziz, Matt Dennie, M.M. Valero, Nicole Hu
Year Published:

Wildfires constitute a serious threat for both the environment and human well-being. The US fire policy aims to tackle this problem, devoting a sizeable amount of resources and resorting extensively to fire suppression strategies. The theoretical…
Author(s): Massimiliano Agovino, Massimiliano Cercielo, Aniello Ferraro, Antonio Garofalo
Year Published: