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Keyword: fire intensity

Fire intensity-Fuel reduction relationships associated with understory burning in Larch/Douglas-fir stands

Documents and Media Posted on: December 19, 2018
Fire has been called everything from bad to good, from friendly hero to villainous foe. Sometimes, it is too naively called natural. The simple fact is that fire is. As long as our climate in the Northern Rocky Mountains remains essentially unchanged, we will have photosynthesis working to produce biomass at rates greater than decomposition can convert that biomass.Document Type: Other Documents

BehavePlus fire modeling system, version 4.0: User's Guide

Publications Posted on: August 01, 2018
The BehavePlus fire modeling system is a program for personal computers that is a collection of mathematical models that describe fire and the fire environment. It is a flexible system that produces tables, graphs, and simple diagrams. It can be used for a multitude of fire management applications including projecting the behavior of an ongoing fire, planning prescribed fire, and training.

A wildfire risk assessment framework for land and resource management

Publications Posted on: June 07, 2018
Wildfires can result in significant, long-lasting impacts to ecological, social, and economic systems. It is necessary, therefore, to identify and understand the risks posed by wildland fire, and to develop cost-effective mitigation strategies accordingly. This report presents a general framework with which to assess wildfire risk and explore mitigation options, and illustrates a process for implementing the framework.

Spatial dataset of probabilistic wildfire risk components for the conterminous United States

Datasets Posted on: March 15, 2018
National burn probability (BP) and conditional fire intensity level (FIL) data were generated for the conterminous United States (US) using a geospatial Fire Simulation (FSim) system developed by the US Forest Service Missoula Fire Sciences Laboratory to estimate probabilistic components of wildfire risk (Finney et al. [2011]). The FSim system includes modules for weather generation, wildfire occurrence, fire growth, and fire suppression.

Importance of fuel treatment for limiting moderate-to-high intensity fire: Findings from comparative fire modeling

Publications Posted on: September 26, 2017
Context: Wildland fire intensity influences natural communities, soil properties, erosion, and sequestered carbon. Measuring effectiveness of fuel treatment for reducing area of higher intensity unplanned fire is argued to be more meaningful than determining effect on total unplanned area burned.

Laboratory experiments to estimate interception of infrared radiation by tree canopies

Publications Posted on: January 06, 2017
Fire is a key earth-system and Anthropocene process (Bowman et al. 2009; Smith et al. 2016a). Fire impacts on the global carbon (C) cycle from both anthropogenic and natural sources, with 1350-3400 Tg C emitted from land-use changes, agricultural practices and residential uses, and 2750-4600 Tg C emitted in wildfire events, which exhibit high interannual variability (Westerling et al. 2006; van der Werf et al. 2010; Wotton et al.

Postfire mortality of ponderosa pine and Douglas-fir: a review of methods to predict tree death

Publications Posted on: May 12, 2016
This review focused on the primary literature that described, modeled, or predicted the probability of postfire mortality in ponderosa pine (Pinus ponderosa) and Douglas-fir (Pseudotsuga menziesii).

Evaluation of a passive flame-height sensor to estimate forest fire intensity.

Publications Posted on: May 12, 2016
The length of flames of wildland fires is a relative indicator of fireline intensity and an important index to fire effects and difficulty of control. A technique for measuring flame height and flame-tilt angle for the purpose of calculating flame length is described. Laboratory tests determined the feasibility of using cotton string treated with ammonium phosphate fertilizers to measure flame height.

Forest Service researchers focus on firefighter safety

Science Spotlights Posted on: September 09, 2015
Data over the past 30 years suggest that firefighter injury and deaths can be attributed almost uniformly to aircraft accidents, driving accidents, heart attacks, and fire entrapments. Forest Service scientists at the Rocky Mountain Research Station have worked to develop new information on safety zones and escape routes that can help keep firefighters safe. This work has resulted in a new understanding of how energy is released from fires and its implications to firefighter safety.

Wildland firefighter safety zones: A review of past science and summary of future needs

Publications Posted on: October 07, 2014
Current wildland firefighter safety zone guidelines are based on studies that assume flat terrain, radiant heating, finite flame width, constant flame temperature and high flame emissivity. Firefighter entrapments and injuries occur across a broad range of vegetation, terrain and atmospheric conditions generally when they are within two flame heights of the fire.