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Estimating changes in effective values of surface detention, depression storage and friction factor at the interrill scale, using a cheap and fast method to mold the soil surface micro-topography

Experiments in Earth surface process research

Auteur(s) et Affiliation(s)

ANTOINE, M.
Earth and Life Inst., Univ. catholique de Louvain (UCL), Louvain-la-Neuve, Belgique
CHALON, C.
Earth and Life Inst., Univ. catholique de Louvain (UCL), Louvain-la-Neuve, Belgique
DARBOUX, F.
INRA, UR 0272 Science du sol, Centre de recherche, Orléans, France
JAVAUX, M.
Earth and Life Inst., Univ. catholique de Louvain (UCL), Louvain-la-Neuve, Belgique
BIELDERS, C.
Earth and Life Inst., Univ. catholique de Louvain (UCL), Louvain-la-Neuve, Belgique


Description :
Surface detention and depression storage constitute the 2 conceptual storages of water at the soil surface and depend on the spatial configuration of the micro-topography. To be able to measure directly those storages and investigate how they evolve with time and precipitation, it is necessary to isolate the impact of the micro-topography from the infiltration. Therefore the AA. developed a fast and cheap in-situ molding method that combines alginate, plaster and lacquer. Both the surface of a specific soil and its artificial reproduction were measured with a laser scanner in order to assess the quality of the molding method. This novel molding method was applied to get 10 footprints of the micro-topography of a loamy bare soil, at different levels of cumulative rainfall erosivity value (R), starting with a tilled soil, and letting it evolve with natural rain events. The AA. finally parametrized surface detention by an effective friction factor, using a classical equation for an equivalent laminar sheet flow.


Type de document :
Article de monographie

Source :
Catena (Giessen), issn : 0341-8162, 2012, vol. 91, p. 10-20, nombre de pages : 11, Références bibliographiques : 43 ref.

Date :
2012

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

Langue :
Anglais
Droits :
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