Burn Severity and Terrain: A Spatial Analysis of Forest Fire Burn Severity Trends in the Western United States

Fire Ecology;Spatial Analysis;Burn Severity Trends in the Western United States;Natural Resources and Environment

Koziol, BenjaminFrench, Nancy ;

University of Michigan

关键词: Fire Ecology;    Spatial Analysis;    Burn Severity Trends in the Western United States;    Natural Resources and Environment;   

Others  :  https://deepblue.lib.umich.edu/bitstream/handle/2027.42/60563/Thesis%20Final%20-%20Ben%20Koziol%20-%2020080808.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Differenced normalized burn ratio (dNBR) is a remote sensing technique measuringforest fire burn severity – the post-fire effects on local forest ecology. Understanding howdNBR varies across landscapes as fuel, local weather conditions, and terrain changesprovides useful insight into the possible application of dNBR as a data source for fuelconsumption and emission modeling. This study evaluated dNBR terrain trends innineteen forest fires in the Western conterminous United States that burned from 2000 to2003. Terrain variables tested for possible correlation with dNBR included elevation,slope, aspect, and annual incident solar radiation. Linear results proved significant (p <0.05) for elevation, slope, and annual incident solar radiation but with low coefficients ofdetermination. Categorical analyses of variance found significant mean differences in allseverity classes for each terrain variable. Results demonstrate that terrain controls ondNBR in these fires emerge over large scales as terrain alters local vegetation and firebehavior trends