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Assessing burn severity and comparing soil water repellency, Hayman Fire, Colorado by Sarah A. Lewis; Joan Q. Wu; Peter R. Robichaud is a Environmental Science article available to read on EtoBox.

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An important element of evaluating a large wildfire is to assess its effects on the soil in order to predict the potential watershed response. After the 55 000 ha Hayman Fire on the Colorado Front Range, 24 soil and vegetation variables were measured to determine the key variables that could be used for a rapid field assessment of burn severity. The percentage of exposed mineral soil and litter cover proved to be the best predictors of burn severity in this environment. Two burn severity classifications, one from a statistical classification tree and the other a Burned Area Emergency Response (BAER) burn severity map, were compared with measured 'ground truth' burn severity at 183 plots and were 56% and 69% accurate, respectively. This study also compared water repellency measurements made with the water drop penetration time (WDPT) test and a mini-disk infiltrometer (MDI) test. At the soil surface, the moderate and highly burned sites had the strongest water repellency, yet were not significantly different from each other. Areas burned at moderate severity had 1Ð5 times more plots that were strongly water repellent at the surface than the areas burned at high severity. However, th

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Author

Sarah A. Lewis; Joan Q. Wu; Peter R. Robichaud

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0885-6087)

Published

2006

Language

EN

Field

Environmental Science (Physical Sciences)