Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"Fire Occurrence"”.
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An evaluation of historical fire occurrence, drought, and the El Niño southern oscillation in the greater Cross Timbers region, U.S.A
A concern over wildfire occurrence, and its relationship to drought and a changing climate has brought increased focus to the interface between the public and fire. Multiple factors, including an increase in fuel loading from decades of continuous fire suppression, changes in land use and …
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Holocene vegetation history and environmental change in the forest-grassland mosaic of the Central Highlands of Madagascar
… new records of vegetation, hydrological change, fire and herbivory activities by using a multiproxy approach, which includes fossil pollen, stable carbon isotopes, diatoms, charcoal and coprophilous spores, that allows for a comprehensive investigation into the history and drivers of vegetation …
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Statistical modeling of rare stochastic disturbance events at continental and global scales: post-fire debris flows and wildland fires
… from global data, and comparison with post-fire debris flows in the western U.S. Forecasting debris flow hazard is challenging due to the episodic occurrence of debris flows in response to stochastic precipitation and, in some areas, wildfires. In order to facilitate hazard assessment, we …
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Statistical modeling of rare stochastic disturbance events at continental and global scales: post-fire debris flows and wildland fires
… from global data, and comparison with post-fire debris flows in the western U.S. Forecasting debris flow hazard is challenging due to the episodic occurrence of debris flows in response to stochastic precipitation and, in some areas, wildfires. In order to facilitate hazard assessment, we …
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Oil palm expansion and land cover changes in the Peruvian Amazon: implications for forest conservation and fire mitigation
… changes in climate are expected to increase fire incidence in Amazonia with detrimental consequences to human health, climate, and natural ecosystems. In this dissertation I developed remote sensing methods to map and quantify land cover changes attributed to oil palm expansion in the …
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Comparing crown fire predictions in ponderosa pine stands among four fire behavior models
Fire and land managers commonly use fire behavior modeling systems to support their planning and decision-making process. Fire modeling systems have been increasingly used across the western United States to plan fuel treatments that reduce hazard fuels, especially as a drier climate has resulted …
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Preventing spontaneous combustion in gob areas of retreating longwall panels by ventilating without bleeders
… problem areas and nullify the probability of fire occurrence. The focus is directed to longwall gobs. The changing gob characteristics, especially the varying degree of consolidation at different parts of a gob as the face moves, is considered. Analytical studies and computer modeling show …
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Multitemporal mapping of burned areas in mixed landscapes in eastern Zambia
Fires occur extensively across Zambia every year, a problem recognized as a major threat to biodiversity. Yet, basic tools for mapping at a spatial and temporal scale that provide useful information for understanding and managing this problem are not available. The objectives of this research were: …
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Modeling canopy foliar traits and disturbance interactions in central Texas woodlands.
… This mapping was used for a series of crown fire simulation comparisons. Fire simulation data show significantly greater frequency of active crown fire occurrence with modeled CBD mapping. Active crown fire initiation is shown to be a function of fuel contiguity levels not achieved by average …
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Drivers of burn severity in the northern Cascade Range, Washington, USA
… climate and topographical complexity on the occurrence, size, severity, and within-fire severity pattern of fires in the northern Cascade Range of Washington, USA. Landsat Thematic Mapper (LTM) data were used to quantify fire severity for all fires greater than 10 ha (n = 125) that occurred …
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Forest soil and vegetation characteristics in two forest types following wildfire in the Shenandoah National Park, Virginia
A wildfire of variable intensity occurred in mid-July of 1988 in the Shenandoah National Park and adjacent private lands. This study was established to measure post-fire forest soil and vegetation characteristics in both the mixed pine and mixed oak forest types occurring on Dovel Mountain in the …
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Vegetation and Forest Fire Dynamics in Alberta: A Ground and Remote Sensing Data Analysis
… analysis of the interplay between forest fires and vegetation dynamics in Alberta, Canada, under the lens of climate change. By synthesizing data from remote sensing, climate records, and fire databases, the study reveals the intricate relationships between vegetation cover changes and …
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IMPACT OF CLIMATE CHANGE ON WILDLAND FIRE THREAT TO THE AMUR TIGER AND ITS HABITAT
… in catastrophic natural events such as wildland fire - one of the dominant disturbance agents in boreal and temperate forests of the Russian Far East (RFE). In the RFE, large fire events lead to abrupt, extensive, and long-term conversion of forests to open landscapes, thus considerably impacting …
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A comparison and synthesis of polar-orbiting and geostationary observations of African biomass burning
… independently detect and characterize all active fires from ignition to extinction. Instead SEVIRI (at 15 min temporal resolution) fails to detect relatively smaller and/or lower intensity fires within its coarser 3 km pixels while MODIS (at 1 km spatial resolution) fails to detect fires between …
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Remote Sensing of Fire, Flooding, and White Sand Ecosystems in the Amazon
… Brazilian Amazon from 1996-2006. Deforestation fires, as measured by hot pixels, declined exponentially with increasing distance from roads. Fewer deforestation fires occurred within protected areas than outside and this difference was greatest near roads. However, even within reserves, more …
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Impacts of Fire on Bats in the Central Appalachians
Fire occurrence was widespread in the central Appalachians pre-European settlement due to Native American ignition and occasional lightning strikes, and continued through European settlement. During this time, low to mixed severity burns supported a suite of ecological communities that were fire …
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A Theoretical Development and Simulation-Based Comparison of Four Parameter Estimation Methods for the Spatio-Temporal Autologistic Model with Emphasis on Maximum Generalized and Block Generalized Pseudolikelihood
… is application-based. More specifically, fire occurrence data from Oregon and Washington state are modeled, while accounting for the Departure from Average fire potential metric as a covariate, using the spatio-temporal autologistic model. All four estimation methods (PL, MCMCML, GPL, and …
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A Theoretical Development and Simulation-Based Comparison of Four Parameter Estimation Methods for the Spatio-Temporal Autologistic Model with Emphasis on Maximum Generalized and Block Generalized Pseudolikelihood
… is application-based. More specifically, fire occurrence data from Oregon and Washington state are modeled, while accounting for the Departure from Average fire potential metric as a covariate, using the spatio-temporal autologistic model. All four estimation methods (PL, MCMCML, GPL, and …
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Using remote sensing to track resilience of subtropical rainforests against fires and tropical cyclones
… and biodiversity loss. Disturbances such as fire and wind potentially undermine efforts to restore degraded landscapes, interacting with the existing vegetation and background topography to produce complex patterns of damage. It is therefore crucial for us to understand these interactions and …
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