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|title: ||Does soil burn severity affect the post-fire runoff and interrill erosion response? A review based on meta-analysis of field rainfall simulation data|
|authors: ||Vieira, D. C. S.|
Vega, J. A.
Keizer, J. J.
Field rainfall simulation experiments
|issue date: ||2015|
|abstract: ||Soil burn severity has been widely used to describe the impacts of fire on soils and is increasingly being
recognised as a decisive factor controlling post-fire erosion rates. However, there is no unique definition
of the term and the relationship between soil burn severity and post-fire hydrological and erosion
response has not yet been fully established.
The objective of this work was to review the existing literature on the role of soil burn severity on postfire
runoff and erosion ratios. To this end, a meta-analysis was carried out of the runoff and inter-rill erosion
data from field rainfall simulation experiments (RSE’s) that compared burnt and unburnt conditions.
In this study, 109 individual observations were analysed that covered a wide geographical range, various
types of land cover (forest, shrubland, and grassland) and two types of fire types (wildfire and prescribed
fire). The effect size of the post-fire runoff and erosion response was determined for four key factors: (i)
soil burn severity; (ii) time-since-fire; (iii) rainfall intensity; and (iv) bare soil cover.
Statistical meta-analysis showed that fire occurrence had a significant effect on the hydrological and
erosive response. However, this effect was only significantly higher with increasing soil burn severity
for inter-rill erosion, and not for runoff. This study furthermore highlighted the incoherencies between
existing burn severity classifications, and proposed an unambiguous classification.|
|publisher version/DOI: ||http://dx.doi.org/10.1016/j.jhydrol.2015.01.071|
|source: ||Journal of hydrology|
|appears in collections||DAO - Artigos|
CESAM - Artigos
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