This publication has been revised to reflect updates made to version 3 of the BehavePlus software, it was originally published as the BehavePlus fire modeling system, version 2.0 User's Guide in June, 2003 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. BehavePlus is the successor to the BEHAVE fire behavior prediction and fuel modeling system. Primary modeling capabilities include surface fire spread and intensity, crown fire spread and intensity, safety zone size, size of point source fire, fire containment, spotting distance, crown scorch height, tree mortality, wind adjustment, and probability of ignition. The User's Guide describes operation of the program. Other papers describe the models and application of the system.
The western United States contains more than 7 million acres of quaking aspen (Populus tremuloides). On the majority of this acreage, aspen sprouted as even-aged stands after fires in the last 150 years. For several reasons, however, fire evidently is no longer playing its historic role of killing and regenerating western aspen stands. A survey was made of wildfire occurrence from 1970 through 1982 in aspen stands on National Forest lands in three Forest Service Regions. The survey data, expanded to include all aspen acreage, revealed that an average of 600 acres are annually consumed by fire. At this rate, it would require about 12,000 years to burn the entire aspen type in the West. During this time span, without management intervention, seral aspen will probably be replaced by conifers, and stable aspen stands may become all-aged and perhaps less productive. Use of prescribed fire is recommended. West. J. Appl. For. 2(3):73-76, July 1987.
A dichotomous event regression model is used to estimate survival of fire-injured interior Douglas-fir (Tseudotsuga menziesii var. glaucaj 1 year after burning. A preliminary salvage marking guide is presented based upon stem diameter at breast height and crown scorch height.
/ Recent advances in fire modeling permit quantitative estimations of fire behavior from quantitative inputs that describe the fuel array and conditions, such as weather and site data, under which it will burn. This paper describes the collection, analysis, and stratification of flammable forest fuels data for coniferous forest ecosystems in Montana and then illustrates the resource management application of these data in three areas: the development of the fire behavior model, a determination of the model's sensitivity to input errors as reflected by fire behavior prediction errors, and the development of a fire hazard simulator (TAROT). A new integrated stand simulator, GANDALF, is highlighted. Conclusions center on the need to integrate fire management into the land management planning decision-making process.
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