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Fire managers are increasingly concerned about the threat of crown fires, yet only now are quantitative methods for assessing crown fire hazard being developed. Links among existing mathematical models of fire behavior are used to develop two indices of crown fire hazard-the Torching Index and Crowning Index. These indices can be used to ordinate different forest stands by their relative susceptibility to crown fire and to compare the effectiveness of crown fire mitigation treatments. The coupled model was used to simulate the wide range of fire behavior possible in a forest stand, from a low-intensity surface fire to a high-intensity active crown fire, for the purpose of comparing potential fire behavior. The hazard indices and behavior simulations incorporate the effects of surface fuel characteristics, dead and live fuel moistures (surface and crown), slope steepness, canopy base height, canopy bulk density, and wind reduction by the canopy. Example simulations are for western Montana Pinus ponderosa and Pinus contorta stands. Although some of the models presented here have had limited testing or restricted geographic applicability, the concepts will apply to models for other regions and new models with greater geographic applicability.
Book Synopsis Assessing Crown Fire Potential by Linking Models of Surface and Crown Fire Behavior by : Joe H. Scott
Download or read book Assessing Crown Fire Potential by Linking Models of Surface and Crown Fire Behavior written by Joe H. Scott and published by . This book was released on 2001 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fire managers are increasingly concerned about the threat of crown fires, yet only now are quantitative methods for assessing crown fire hazard being developed. Links among existing mathematical models of fire behavior are used to develop two indices of crown fire hazard-the Torching Index and Crowning Index. These indices can be used to ordinate different forest stands by their relative susceptibility to crown fire and to compare the effectiveness of crown fire mitigation treatments. The coupled model was used to simulate the wide range of fire behavior possible in a forest stand, from a low-intensity surface fire to a high-intensity active crown fire, for the purpose of comparing potential fire behavior. The hazard indices and behavior simulations incorporate the effects of surface fuel characteristics, dead and live fuel moistures (surface and crown), slope steepness, canopy base height, canopy bulk density, and wind reduction by the canopy. Example simulations are for western Montana Pinus ponderosa and Pinus contorta stands. Although some of the models presented here have had limited testing or restricted geographic applicability, the concepts will apply to models for other regions and new models with greater geographic applicability.
Fire managers are increasingly concerned about the threat of crown fires (CF), yet only now are quantitative methods for assessing CF hazard being developed. Links among existing mathematical models of fire behavior are used to develop two indices of CF hazard -- the Torching Index & Crowning Index. These indices can be used to coordinate different forest stands by their relative susceptibility to CF & to compare the effective. of CF mitigation treat. The coupled model was used to simulate the wide range of fire behavior possible in a forest stand for the purpose of comparing potential fire behavior. The concepts will apply to models for other regions & new models.
Book Synopsis Assessing Crown Fire Potential by Linking Models of Surface and Crown Fire Behavior by : Joe H. Scott
Download or read book Assessing Crown Fire Potential by Linking Models of Surface and Crown Fire Behavior written by Joe H. Scott and published by . This book was released on 2001-08 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fire managers are increasingly concerned about the threat of crown fires (CF), yet only now are quantitative methods for assessing CF hazard being developed. Links among existing mathematical models of fire behavior are used to develop two indices of CF hazard -- the Torching Index & Crowning Index. These indices can be used to coordinate different forest stands by their relative susceptibility to CF & to compare the effective. of CF mitigation treat. The coupled model was used to simulate the wide range of fire behavior possible in a forest stand for the purpose of comparing potential fire behavior. The concepts will apply to models for other regions & new models.
Book Synopsis How to Generate and Interpret Fire Characteristics Charts for Surface and Crown Fire Behavior by : Patricia L. Andrews
Download or read book How to Generate and Interpret Fire Characteristics Charts for Surface and Crown Fire Behavior written by Patricia L. Andrews and published by . This book was released on 2011 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Standard Fire Behavior Fuel Models by : Joe H. Scott
Download or read book Standard Fire Behavior Fuel Models written by Joe H. Scott and published by . This book was released on 2005 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparison of Crown Fire Modeling Systems Used in Three Fire Management Applications by : Joe H. Scott
Download or read book Comparison of Crown Fire Modeling Systems Used in Three Fire Management Applications written by Joe H. Scott and published by . This book was released on 1998 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Predicting Behavior and Size of Crown Fires in the Northern Rocky Mountains by : Richard C. Rothermel
Download or read book Predicting Behavior and Size of Crown Fires in the Northern Rocky Mountains written by Richard C. Rothermel and published by . This book was released on 1991 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fire Management Notes written by and published by . This book was released on 1999 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Paper RMRS written by and published by . This book was released on 1998 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Birds are indicators of vegetation structure and ecological conditions. The singing activity of birds declines during late-morning periods, which can affect estimates of abundance and conclusions regarding vegetative conditions indexed by birds. Therefore, it is important to quantify periods of bird activity so biologists can plan studies. We determined hourly detections from singing males of 22 nongame bird species in ponderosa pine, quaking aspen, and grassland vegetation types in the Black Hills of South Dakota. Detections of 12 of 22 species differed among 1-hr intervals after sunrise. Detections of yellowrumped warblers, Townsend's solitaires, red-breasted nuthatches, western tanagers, and American robins decreased on count-episodes more than 4 hrs after sunrise. Detections of dusky flycatchers declined on count-episodes more than 3 hrs after sunrise and detections of black-capped chickadees were greatest during the first hour after sunrise and declined afterward. Detections of many other species from songs or calls decreased on count-episodes more than 5 hrs after sunrise. We recommend that bird counts in the Black Hills be completed within 4 hrs after sunrise so estimates of bird abundance are not affected by reduced singing among males.
Book Synopsis Optimum Timeframes for Detecting Songbird Vocalizations in the Black Hills by : Todd R. Mills
Download or read book Optimum Timeframes for Detecting Songbird Vocalizations in the Black Hills written by Todd R. Mills and published by . This book was released on 2000 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Birds are indicators of vegetation structure and ecological conditions. The singing activity of birds declines during late-morning periods, which can affect estimates of abundance and conclusions regarding vegetative conditions indexed by birds. Therefore, it is important to quantify periods of bird activity so biologists can plan studies. We determined hourly detections from singing males of 22 nongame bird species in ponderosa pine, quaking aspen, and grassland vegetation types in the Black Hills of South Dakota. Detections of 12 of 22 species differed among 1-hr intervals after sunrise. Detections of yellowrumped warblers, Townsend's solitaires, red-breasted nuthatches, western tanagers, and American robins decreased on count-episodes more than 4 hrs after sunrise. Detections of dusky flycatchers declined on count-episodes more than 3 hrs after sunrise and detections of black-capped chickadees were greatest during the first hour after sunrise and declined afterward. Detections of many other species from songs or calls decreased on count-episodes more than 5 hrs after sunrise. We recommend that bird counts in the Black Hills be completed within 4 hrs after sunrise so estimates of bird abundance are not affected by reduced singing among males.
Book Synopsis Idaho Panhandle National Forest (N.F.), Lakeview-Reeder Fuel Reduction Project by :
Download or read book Idaho Panhandle National Forest (N.F.), Lakeview-Reeder Fuel Reduction Project written by and published by . This book was released on 2009 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
