Author: Robert E. Keane
Publisher:
ISBN:
Category : Forest fire forecasting
Languages : en
Pages : 72
Get Book Here
Book Description
Fuel and vegetation spatial data layers required by the spatially explicit fire growth model FARSITE were developed for all langs in and around the Selway-Bitterroot Wilderness Area in Idaho and Montana. Satellite imagery and terrain modeling were used to create the three base vegetation spatial data layers of potential vegetation, cover type, and structural stage. Fire behavior fuel models and crown characteristics were assigned to combinations of base layer categories on these maps by local fire managers, ecologists, and existing data. FARSITE fuels maps are used to simulate growth of prescribed natural fires in the wilderness area, aiding managers in the planning and allocation of resources. An extensive accuracy assessment of all maps indicated fuels layers are about 60 percent accurate. This methodology was designed to be replicated for other areas.
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 842
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 138
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Wilderness areas
Languages : en
Pages : 398
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Wilderness areas
Languages : en
Pages : 400
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 398
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Forest fire forecasting
Languages : en
Pages : 52
Get Book Here
Book Description
The objective of this study was to provide managers with national-level data on current conditions of vegetation and fuels developed from ecologically based methods to address these questions: How do current vegetation and fuels differ from those that existed historically? Where on the landscape do vegetation and fuels differ from historical levels? In particular, where are high fuel accumulations? When considered at a coarse scale, which areas estimated to have high fuel accumulations represent the highest priorities for treatment?
Author: Joe H. Scott
Publisher:
ISBN:
Category : Fire risk assessment
Languages : en
Pages : 68
Get Book Here
Book Description
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.
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 180
Get Book Here
Book Description
Author: Todd R. Mills
Publisher:
ISBN:
Category : Birdsongs
Languages : en
Pages : 392
Get Book Here
Book Description
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.
