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 21 for “"burned area"”.
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Megafires in the temperate conifer forests of the Sierra Nevada mountains of California from 1985 to 2020: remote sensing and field-based analysis of fire characteristics and vegetation recovery dynamics
Global burned area has seen a decrease over recent decades, but there are stark regional trends of increasing burned area, fire frequency and burn severity. As a result of fire suppression-mediated fuel accumulation and accelerating climatic changes, this trend of an intensifying fire regime is …
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Multitemporal mapping of burned areas in mixed landscapes in eastern Zambia
… in eastern Zambia. A new approach for mapping burned areas uses multitemporal image analysis with a fuzzy clustering algorithm to automatically select spectral-temporal signatures that are then used to classify the images to produce the desired spatio-temporal burned area information. Testing …
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The macro-charcoal signature in Bwabwata National park, north-east, Namibia: Calibrating surface macro-charcoal with environmental variables
… throught the use of paleao-proxies. Charcoal - burned pieces of vegetation - is a proxy for fire and vegetation history. However, little is known about the relationship between charcoal found in sediment and environmental features in the savanna biome. This study aims to fill the knowledge gap …
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Forest fire management in Portugal : developing system insights through models of social and physical dynamics
… fires is a serious national problem in Portugal. Burned area has increased steadily over the past several decades, with particularly devastating years in 2003 and 2005. Ignitions also spike dramatically in summer, which greatly strains firefighting resources and leads to fires that are …
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Habitat selection of three rodents in a frequently burned boreal environment : productivity and habitat diversity
… the summers of 1973 and 197^. One had been unburned for 120 years, the other was part of a fire which burned in the spring of 1969. Grids of 15m x 15m were established in each plot and meter square quadrats taken at each of the 250 grid intersections in order to determine plant composition and …
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Spatiotemporal Distribution of Siberian Wildfires and Impacts from Meteorological and Climatic Factors
… wildfire ignition. Over the past 20 years, the burned area in this region has shown pronounced inter‑annual variability, with no clear long‑term trend. The main fuel types consist of temperate grasslands and the dried herbaceous layer in the forest‑steppe ecotone. The FE (Far East) region is …
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18년간 입원한 화상 환자의 연령군에 따른 분석
… of burn injury in each groups(78.2%,77.5%). Burned site among the patients, the multiple site was most common(74.3%),the upper extremity only was8.9%,and the lower extremity only was 8.5%. The extents of burned area,the less than 10% group was the most common in all age groups.
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The role of humans, climate and vegetation in the complex fire regimes of north-east Namibia
… who are agriculturalists and pastoralists. The area has been subject to colonial regimes, war, inter-ethnic conflict, social-political resettlement, conservation and associated changing fire management approaches since the 19th century. The vegetation includes omiramba grasslands, …
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Geographical information systems and remote sensing in mapping and monitoring fire-altered forest
… of the research are: 1. To map recent and old burned areas accurately by using satellite images. 2. To accurately assess the area and wood volume affected by fire using a Digital Elevation Model (DEM) ofThasos and employing GIS analysis. 3. To monitor Pinus brutia forest and ecosystem …
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Capitalization of Environmental Amenities and Wildfire in Private Home Values of the Wildland Urban Interface of Northwest Montana, USA
… non-market benefits from publicly managed WUI areas, including recreation and aesthetically pleasing vistas, which are affected by wildfire management. The objective of this study was to assess the effects of wildfire on social welfare in northwest Montana. This was achieved by fitting a …
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Fire-on-Fire Interactions in Three Large Wilderness Areas
… subsequent large wildfires in three wilderness areas: The Greater Bob Marshall, the Selway-Bitterroot, and the Frank Church. Data from the Monitoring Trends in Burn Severity (MTBS) project, which mapped large wildfires in the western United States occurring since 1984, are used for the research. …
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Capitalization of Environmental Amenities and Wildfire in Private Home Values of the Wildland Urban Interface of Northwest Montana, USA
… non-market benefits from publicly managed WUI areas, including recreation and aesthetically pleasing vistas, which are affected by wildfire management. The objective of this study was to assess the effects of wildfire on social welfare in northwest Montana. This was achieved by fitting a …
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Fire-on-Fire Interactions in Three Large Wilderness Areas
… subsequent large wildfires in three wilderness areas: The Greater Bob Marshall, the Selway-Bitterroot, and the Frank Church. Data from the Monitoring Trends in Burn Severity (MTBS) project, which mapped large wildfires in the western United States occurring since 1984, are used for the research. …
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Investigating the effect of variability in biomass burning emissions inventories on GEOS-Chem modeled trace gas and aerosol concentrations
… used for identifying fires and measuring burned area, as well as differences in emission factors describing the vegetative fuels burned. Using the GEOS-Chem v1 1-01 chemical transport model, we studied how differences in emissions estimates between two commonly-used global biomass burning …
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Spatiotemporal Variability of CO2, Solar-Induced Fluorescence, And Precipitation Over the Tropical Rainforests
… high vapor pressure deficit (VPD), and burned areas). Specifically, we use Orbiting Carbon Observatory 2 (OCO-2) SIF, OCO-2 CO2, Global Precipitation Climatology Project (GPCP) precipitation, Moderate Resolution Imaging Spectrometer (MODIS) burned area, and CarbonTracker Model. Over the …
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Wildfire Management in the Southside Region of Canada’s Montane Cordillera - A Systems Modelling Application on Firebreak Strategies
… hectares of forest land cover 35% of its land area, representing 9% of the world’s forests and 24% of the world’s boreal forests. As a renewable resource, forests offer significant environmental, economic and recreational benefits and innumerable services contributing to the quality of life. …
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Learning with Weak Supervision for Land Cover Mapping Problems
… mainly come from the land cover problems of burned area mapping and urban mapping, the methods developed in this thesis are applicable to other domains as well, where similar forms of weak labels are available as demonstrated by experiments on data sets from other domains like natural …
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The response of a Rocky Mountain forest system to a shifting disturbance regime
… beetle outbreaks are currently affecting large areas of forest throughout western North America, and increasing disturbance size and severity will have uncertain impacts on forest persistence. The goal of my dissertation was to investigate the factors shaping disturbance response in a region of …
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Wildfire as Coupled Human Natural System
Wildfire activity has increased in recent years in the United States, endangering both environment and society. Appropriate management of this phenomenon is only achievable with a thorough understanding of the critical factors influencing wildfire activity in each region. In three essays, I use …
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Responses of Above- and Belowground Forb and Plant Species Diversity to Grazing Exclusion and Fire in the Northern Great Basin Sagebrush Steppe
… in above- and belowground diversity between burned and adjacent unburned areas, and between grazed and long-term grazing excluded areas, using soil seed bank and aboveground cover attributes in order to provide insight into ecological potentials of sagebrush sites in the northern Great …
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