Historically wildfires have been beneficial to forests, however, human developments have encroached on forests when wildfire was artificially suppressed by federal and state agencies. The area burned by wildfire each year has increased twenty-fold in the past three decades. Large, high severity fires pose increased threats to human and aquatic communities within and downstream of the burned area due to post-wildfire effects on flooding and sedimentation. We need to understand the impacts of wildfires to be able to mitigate their damages and to recognize their potential benefits. This research addresses the questions: 1) Do wildfires impact rural and urban economies differently and what are managers doing to adapt management strategies? 2) Do floods increase after wildfire, and if so, by how much? 3) Do wildfires affect fish habitat, and if so, how? Chapter 2 provides insight into both positive and negative economic impacts on rural and urban economies after a wildfire, and brings to light manager’s inability to change their management strategies due to constraints such as budget limitations. Chapter 3 measures how floods change in nine basins after a wildfire occurred, and reveals that floods may increase up to 880 percent after a fire. Chapter 4 demonstrates that fish habitat is significantly altered after wildfires and why change is harmful to the fish. This work shows that wildfire significantly changes the burned and surrounding area, and that more work is needed for a better understanding of how to predict how a specific area will respond to wildfire.

It has been well established that under certain circumstances wildfire is capable of producing water repellent or hydrophobic soils. Hydrophobic soils can dramatically alter runoff and erosion processes and as such have been the subject of considerable research activity. Wildfires in chaparral vegetation are recognized as being particularly susceptible to hydrophobic soil development. A comparison of chaparral fire soil heat profiles from DeBano (1989) and Weirich (unpublished) indicates that under higher fire intensity situations in chaparral a different soil heating mechanism other than just conduction heating may be at work. In contrast to the slow moving low temperature increases expected in conduction heating a much faster heat pulse resulting in more rapid temperature rises and higher temperatures at depth can also occur in chaparral wildland fires. This suggests that a better understanding of the heat transfer processes that occur at extreme fire intensities is both important and is needed. The specific aim of this study was to observe heat flow under a variety of particle sizes using a laboratory based wildfire simulator operating at intensities and durations similar to those experienced in chaparral wildfires. The wildfire simulator system consisted of a propane burner array, an array of thermocouples to measure temperatures at varying locations and depths, and a data logging system to record the results of the heating experiments. Using the simulator homogenous sand, silt, clay, and heterogeneous clay loam were subjected to 600ºC, 900ºC, and 1200ºC peak intensities with two different heating durations or treatments (H1 and H2). The heating levels and durations used were based on data from field based chaparral fire experimental temperature data previously collected by Weirich (unpublished). The system design allowed the user to control the intensity and duration of the heat treatments and the thermocouple sensor arrays measured temperatures at the flame to a soil depth of 15cm. The apparatus and experimental treatments allowed for the investigation of peak heat intensity, heat duration, slope, and most importantly particle size on heat transfer processes. The higher soil temperatures at depth, shorter times to peak temperatures at depth, and observed temperature spiking seen during some of the simulator experimental runs (specifically with respect to larger particle sizes such as sand) call into question the view that slow moving conduction may not be the only soil heat transfer process at work in high fire intensity situations such as those seen in chaparral wildfires and in particular chaparral wildfire underlain by larger particle sizes fractions such as sand.

Wildland fire is an important and complex issue, particularly in the fire-prone ecosystems of the Western United States. At the same time that the number of catastrophic wildland fires is increasing across the United States, more people are moving in to wildland areas growing the interface between urban and wildlands. Managing wildfire in the Western United States is becoming increasingly more complex and costly as growth and development continues to push the edge of municipalities into undeveloped wildlands. Communities in this wildland urban interface are exacerbating the problem of wildfire in the West. With more people living in wildfire prone areas and changes facing our climate, the occurrence of catastrophic wildfire in the U.S., particularly in the West, is only expected to increase. It is unrealistic to rely on voluntary actions to address the problem of development in wildfire prone ecosystems. Greater understanding of the ways we can build our communities to live with wildfire and using this understanding to guide planning and design decisions will be necessary to improve community resilience to wildfire in the West. Planners and designers will play a key role because these professionals have unique opportunity to address development in areas at-risk of wildfire before the need or want for development occurs. In order to improve the resilience of Western communities to wildfire, the current state of wildfire science and planning must be known to identify the gaps between best available science and practice and improve the development of communities at risk of wildfire. Therefore, the first objective of this study was to conduct a comprehensive literature review, and the second objective was to use key findings from the literature review to inform a framework to guide planning and design decisions in wildfire prone communities. The intent of the state of the art review was to provide a critical examination of both best available, peer-reviewed wildfire literature and the current strategies communities in the Western United States are employing to address the growing threat of wildland fire. Knowledge of the benefits and limitations of the current state of community wildfire planning and design in the fire-prone ecosystems of the West helped identify where community resilience could be improved. Beneficial community wildfire planning and design strategies provided the foundation for a planning and design audit. The goal of this audit was to evaluate a community’s preparedness for wildfire, which was assessed based on reduction of losses to life and property. This audit was tested using two Western communities: one that successfully reduced its risk of wildfire and one that was unsuccessful. The wildfire planning and design audit provides a checklist for planners and designers to ensure future growth and development reflects wildfire risk.

Cultural representations of bushfire have long reflected the importance of these events in both the nation’s history and in popular imagination. / The central argument of this thesis is that depictions of fire in literature, art, film and popular culture have demonstrated the capacity to shape community understandings of bushfire behaviour and may influence the way in which people respond to and behave during such emergencies. In support of this, the role that bushfire has played in popular culture is explored and the perpetuation of certain myths and understandings through a range of cultural expressions is examined. It is contended that these cultural artefacts can have a direct impact upon community understanding of bushfires, their place in the Australian landscape and — importantly — how the broader community respond to such events. / The work discerns the shift in attitude towards bushfire in such cultural expressions from the 19th century until the present day. One purpose of the research is to posit whether such influences may act as impediments to the delivery of community bushfire education programs. / The structure of the thesis incorporates an introductory review of relevant literature and theoretical material. As the study of the cultural interpretation of disaster in Australia is in its infancy, pertinent overseas research is examined that identifies theoretical models that may be applied to bushfires in Australia. In particular, the representation of bushfire in • visual art • children’s literature; • adult fiction; is examined in detail. / Primary texts and artistic works will be examined for evidence of the understandings about bushfire that they generate or sustain. These interpretations will be compared with scientific and experiential understandings of bushfire behaviour and to the limited literature in disaster studies that has examined myths and perceptions of such events. / In the visual arts, fire has an obvious attraction for practitioners, both during its impact and in its aftermath. There has been an evident revival of interest in fire as a theme in the late 20th and early 21st centuries parallel to the intense interest artists showed in these events at the end of the 19th century. / Juvenile literature in Australia has produced extensive manifestations of bushfire representations. Fire lends itself to depiction in this genre for a number of reasons. It has been used, for example, to locate stories in a distinctly Australian context. It provides the elements of danger and adventure that allow for the development of strong narratives. Finally, it has a bold visual element that lends itself to pictorial interpretations. There is significant theoretical support for the idea that knowledge learned at this stage of a person’s development is retained until much later in life. / Conversely, bushfire appears to be relatively unusual as the basis for adult fiction, although (particularly in the 19th century) it is often incorporated into the background landscape. There are only a handful of adult novels in which bushfire is central to the narrative, while there are many in which it forms part of the backdrop.

Lesser prairie chicken (Tympanuchus pallidicinctus) numbers have declined considerably in Texas since the early 1900s. Conversion of native prairie to cropland has been the major cause of the decline. I trapped and monitored 115 (66 males, 49 females) lesser prairie chickens in the Rolling Plains of the Texas Panhandle from 2001 through 2003. I used an information-theoretic approach to model selection as implemented in program MARK to evaluate factors contributing to variation in survival and differences in nest success. I found breeding season survival of both males and females was lower compared to non-breeding season survival. Annual survival was 0.52 (95% CI: 0.32? 0.71). Model selection indicated higher nest success (70%) in the sand sagebrush (Artemisia filifolia) vegetation type as compared to the shinnery oak (Quercus harvardii) type (40%). I also evaluated post-burn habitat alterations and plant succession (1 year and 2 years after burning) as potential lesser prairie chicken habitat. After spring rainfalls stimulated re-growth of herbaceous plants, male lesser prairie chickens moved to the site, feeding on new-emerging forbs throughout the summer. A female lesser prairie chicken with a brood used the burned site during the first summer after the burn. A year later, males established a lek on the burned site. Two female lesser prairie chickens with broods used the burned site during the second summer. Burned sites had more forbs than nonburned sites and probably had more insects available which are an important food source for chicks during their first 4?5 weeks of age.

There is presently no wildfire model developed for Swedish conditions, only a fire danger rating system (FWI) has been developed for Swedish conditions. The demand for a wildfire model has not been great in the past in Sweden but the climate changes now taking place increases the risk of large and intensive wildfires in Sweden. The need for additional and better tools for sizing-up wildfires will be in great demand in the future. This pre-study is aimed at: - Presenting what has been done in the wildfire modeling field during the years and mainly the last twenty years. - Giving recommendations on the continued work with developing a Swedish wildfire model. The method that was used was literature and article survey. The study also looks into the required input data for a wildfire model and the input data available at the moment. This issue is highly crucial as the quality of the output of a wildfire model is depending upon the quality of the input data. During the study, a primitive wildfire model was constructed and refined in order to get an insight in the complexities and problems with developing an operational model. The following characterization of wildfire models was used during the study: - Statistical models: based primarily on statistics from earlier or experimental fires. They do not explicitly consider the controlling physical processes. - Semi-empirical models: based on physical laws, but enhanced with some empirical factors, often by lumping all physical mechanisms for heat transfer together. - Physical models: based on physical principles and distinguishing between physical mechanisms for heat transfer. The statistical models make no attempt to involve physical processes, as they are merely a statistical description of test fires. Thus the lack of a physical basis means that statistical models must be used carefully outside the test conditions. Semi-empirical models are often based on conservation of energy principles but do not make any difference between conduction, convection and radiation heat transfer. The semi-empirical model has low computational requirements and includes variables that are generally easy to measure in the field. So despite the issue with limited accuracy, the speed and simplicity of these models make them useful for operational use. Physical models have the advantage that they are based on known relationships and thus facilitating their scaling. Thus we can expect that physical models would provide the most accurate predictions and have the widest applicability. But the work on physical models is suffering of for example the lack of understanding of several processes, such as the characterization of the chemical processes taking place during combustion, the resulting flame characteristics and the isolation and quantification of physical processes governing heat transfer. The input data available today are generally not detailed enough for physical models. As a result, a very detailed physical model will still only give imprecise predictions. As better and more detailed input will be available, the use of physical models will be more justified. A semi-empirical model is recommended being developed in Sweden. This conclusion is based upon the following factors: - The accuracy of a semi-empirical model is generally much better than for a statistical model, also the use of a semi-empirical model is much wider than the use of a statistical model. - The amount of work required for developing a semi-empirical model will not differ much from the amount of work required for a statistical model. In both cases a number of test fires will have to be conducted to define and calibrate a number of fuel models representative of Sweden. - Presently the performance and application of physical models is not at an acceptable level (due to for example the complexity which they are to model and the computational capabilities of the PC’s of today) for operational use. The semi-empirical model for Sweden is recommended to be built upon Swedish conditions (i.e. built upon the type of vegetation found in Sweden) instead of trying to retrofit the local Swedish conditions into an existing model. This would most likely give the best output for Swedish conditions. A system for better input data - weather and fuel data – should be worked on as well. This could for example take advantage of the results of the very promising “Alarm”-project that is being conducted in western part of Sweden. Regarding the issue on better fuel data, new technology for satellite images or aerial photos and image classification techniques must be monitored as one major problem to be solved is distinguishing between the canopy fuel and the ground fuel. For more specific conclusions and reflections, please see the analysis and discussion, and conclusions sections of this report.

The wildland fire risk in Arizona is increasing due to shifting land uses, growing residential communities, and changing climate. As the fire hazard increases, land managers and fire educators are faced with educating wildland-urban interface residents about their risk to influence homeowner behavior. To determine how homeowners perceive their risk and what information they use to make decisions about risk and mitigation, this study surveyed residents in previously identified high risk areas in Arizona in three different vegetation types. Results show that ponderosa pine residents are more savvy about their risk and more active in mitigating that risk. Grassland and desert scrub residents consistently report a lower perceived risk to wildland fire than their forest counterparts and perform less mitigation. Results suggest that grassland and desert scrub communities may benefit from the production and dissemination of fire-related materials detailing risk specific to these areas.

Wildfires are a natural hazard that present an increasing risk to communities in fire-prone areas. This study examines the impacts of the municipal-level built environment upon fire damages in California, a particularly fire-vulnerable state. This study uses a multivariate linear regression model to isolate the effects of the human built environment upon reported monetary wildfire damages. Reported monetary losses from wildfires for the years 2007 to 2010 are examined against relevant built environment variables, while statistically controlling for biophysical and socio-economic variables. The fully-specified regression model indicates that wildfire property damage is driven primarily by the built environment. Socioeconomic and biophysical variables contribute comparatively little explanatory power to the model. Findings from this study will be of particular interest to fire management officials, land developers, and urban planners interested in creating a more fire-resilient future for cities within California.

Cultural representations of bushfire have long reflected the importance of these events in both the nation’s history and in popular imagination. / The central argument of this thesis is that depictions of fire in literature, art, film and popular culture have demonstrated the capacity to shape community understandings of bushfire behaviour and may influence the way in which people respond to and behave during such emergencies. In support of this, the role that bushfire has played in popular culture is explored and the perpetuation of certain myths and understandings through a range of cultural expressions is examined. It is contended that these cultural artefacts can have a direct impact upon community understanding of bushfires, their place in the Australian landscape and — importantly — how the broader community respond to such events. / The work discerns the shift in attitude towards bushfire in such cultural expressions from the 19th century until the present day. One purpose of the research is to posit whether such influences may act as impediments to the delivery of community bushfire education programs. / The structure of the thesis incorporates an introductory review of relevant literature and theoretical material. As the study of the cultural interpretation of disaster in Australia is in its infancy, pertinent overseas research is examined that identifies theoretical models that may be applied to bushfires in Australia. In particular, the representation of bushfire in • visual art • children’s literature; • adult fiction; is examined in detail. / Primary texts and artistic works will be examined for evidence of the understandings about bushfire that they generate or sustain. These interpretations will be compared with scientific and experiential understandings of bushfire behaviour and to the limited literature in disaster studies that has examined myths and perceptions of such events. / In the visual arts, fire has an obvious attraction for practitioners, both during its impact and in its aftermath. There has been an evident revival of interest in fire as a theme in the late 20th and early 21st centuries parallel to the intense interest artists showed in these events at the end of the 19th century. / Juvenile literature in Australia has produced extensive manifestations of bushfire representations. Fire lends itself to depiction in this genre for a number of reasons. It has been used, for example, to locate stories in a distinctly Australian context. It provides the elements of danger and adventure that allow for the development of strong narratives. Finally, it has a bold visual element that lends itself to pictorial interpretations. There is significant theoretical support for the idea that knowledge learned at this stage of a person’s development is retained until much later in life. / Conversely, bushfire appears to be relatively unusual as the basis for adult fiction, although (particularly in the 19th century) it is often incorporated into the background landscape. There are only a handful of adult novels in which bushfire is central to the narrative, while there are many in which it forms part of the backdrop.

Thesis (M.S.)--Humboldt State University, 2007. / Includes bibliographical references (leaves 39-44). Also available via Humboldt Digital Scholar.