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Mechanics of interrill erosion with wind-driven rain

Auteur(s) et Affiliation(s)

ERPUL, G.
Dep. of Soil Science, Fac. of Agriculture, Univ., Ankara, Turquie
Earth Sciences Application and Research Center, Univ., Ankara, Turquie
GABRIELS, D.
Dep. of Soil Management, Univ., Ghent, Belgique
NORTON, L.D.
USDA-ARS National Soil Erosion Research Lab., Purdue Univ., West Lafayette, Etats-Unis
FLANAGAN, D.C.
USDA-ARS National Soil Erosion Research Lab., Purdue Univ., West Lafayette, Etats-Unis
HUANG, C.-H.
USDA-ARS National Soil Erosion Research Lab., Purdue Univ., West Lafayette, Etats-Unis
VISSER, S.M.
Soil Physics and Land Use team, Alterra, UR, Wageningen, Pays-Bas


Description :
The vector physics of wind-driven rain (WDR) differs from that of wind-free rain, and the interrill soil detachment equations in the Water Erosion Prediction Project (WEPP) model were not originally developed to deal with this phenomenon. This paper provides an evaluation of the performance of the interrill component of the WEPP model for WDR events. The interrill delivery rates were measured in the wind tunnel facility of the International Center for Eremology (ICE), Ghent University, Belgium with an experimental setup to study different raindrop impact velocity vectors. Synchronized wind and rain simulations with different wind velocities were applied to a test surface placed on windward and leeward slopes. The results suggested that along with the fall trajectory of wind-driven raindrops with a given frequency, raindrop velocity and direction at the point of impact onto the soil surface provided sufficient physical information to improve WEPP sediment delivery rate predictions under WDR.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 2, p. 160-168, nombre de pages : 9, Références bibliographiques : 1 p.

Date :
2013

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

Langue :
Anglais
Droits :
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