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Caesium-137-derived erosion rates in an agricultural setting : the effects of model assumptions and management practices

Quantifying rates and timescales of geomorphic processes : part 2. Special issue

Auteurs :
FORNES, W.L.
WHITING, P.J.
WILSON, C.G.
MATISOFF, G.
HEIMSATH, A.

Description :
Soil erosion rates at the National Soil Tilth Laboratory Deep Loess Research Station, near Treynor, southwest Iowa, were determined from Cs 137 inventories using a multi-box numerical model that incorporates time-dependent atmospheric Cs 137 deposition. Nine sites along a downslope transect where Cs 137 inventories were measured in 1974 by Spomer et al. were revisited in 1998, allowing estimation of erosion over 3 time periods : 1954-1974, 1954-1998 and 1974-1998. The results permit comparison of erosion rates over these 3 periods, to assess the effects of changes in soil conservation practices. The AA. introduce a model that accounts for time-dependent Cs 137 fallout, precipitation and soil cultivation.


Type de document :
Article de monographie

Source :
Earth surface processes and landforms, issn : 0197-9337, 2005, vol. 30, n°. 9, p. 1181-1189, nombre de pages : 9, Collation : Illustration, Références bibliographiques : 43 ref.

Date :
2005

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

Langue :
Anglais
Droits :
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