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Application of 210Pbex inventories to measure net hillslope erosion at burned sites

Auteur(s) et Affiliation(s)

PERREAULT, L.M.
Center for Ecohydraulics Research, Univ. of Idaho, Boise, Etats-Unis
YAGER, E.M.
Center for Ecohydraulics Research, Univ. of Idaho, Boise, Etats-Unis
AALTO, R.
Geography, College of Life and Environmental Sciences, Univ., Exeter, Royaume-Uni


Description :
Fallout radionuclides, including lead-210 excess (210Pbex), have only recently been applied in burned terrain. The AA. collected over 400 soil samples from unburned, moderately and severely burned forested sites in central Idaho. They measured soil 210Pbex content at stable reference and eroding sites and in mineral and organic soil components. At all sites, organic matter had the highest concentration of 210Pbex. The results indicate that most 210Pbex in these semi-arid, forested sites was bound to organic matter, and that a substantial portion of this lead was lost due to forest fires. Thus, given methodological uncertainties, 210Pbex losses due to fire, and the subsequent sensitivity of calculated net erosion rates to these lower 210Pbex inventories, the AA. suggest this method should not be used in burned terrain to calculate absolute net erosion and deposition rates. However, within a given burned site, 210Pbex inventories still provide useful information describing relative soil losses and storage across the landscape.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 2, p. 133-145, nombre de pages : 13, Références bibliographiques : 1 p.

Date :
2013

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
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