A regional analysis of the effects of largest events on soil erosion

Auteur(s) et Affiliation(s)

GONZALEZ-HIDALGO, J.C.

Dept. of Geography, Univ., Zaragoza, Espagne

IUCA Univ., Zaragoza, Espagne

BATALLA, R.J.

Dep. of Environment and Soil Science, Univ., Lleida, Espagne

Forestry Science Center of Catalonia, Solsona, Espagne

Catalan Inst. for Water Research, Espagne

CERDÀ, A.

Dept. of Geography, Univ., Valencia, Espagne

DE LUIS, M.

Dept. of Geography, Univ., Zaragoza, Espagne

IUCA Univ., Zaragoza, Espagne

Description :
Alternatively, the AA. define extreme events as the largest events sorted by rank, whatever their absolute magnitude. The new approach applied to soil erosion is that, whatever the magnitude of soil eroded, erosion is a time compressed process and the percentage contribution to total soil erosion by the few largest events (regardless of their magnitude) is negatively related to the total number of daily soil erosion events recorded. The AA. present here a geographical analysis of the effects of largest daily event on soil erosion by comparing 594 erosion plots located in agricultural fields under various climatic temperate conditions across the central-east of the USA. It is shown that the n-largest events contribution not differ between regions of USA. Time compression pattern is expressed by an empirical power law. Erosion research validation require a minimum number of daily events.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2012, vol. 95, p. 85-90, nombre de pages : 6, Références bibliographiques : 28 ref.

Date :
2012

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais