Sedimentation source identification in a semiarid watershed at soil mapping unit scales

Auteur(s) et Affiliation(s)

RHOTON, F.E.

USDA-ARS National Sedimentation Lab., MS, Oxford, Etats-Unis

EMMERICH, W.E.

USDA-ARS Southwest Watershed Research Center, AZ, Tucson, Etats-Unis

NEARING, M.A.

USDA-ARS Southwest Watershed Research Center, AZ, Tucson, Etats-Unis

MCCHESNEY, D.S.

USDA-ARS National Sedimentation Lab., MS, Oxford, Etats-Unis

RITCHIE, J.C.

USDA-ARS, Hydrology and Remote Sensing Lab., Beltsville, Etats-Unis

Description :
The aim of this research was to develop an approach to identify sediment sources at a soil mapping unit scale for the purpose of designing site specific best management practices which affect greater reductions in runoff and erosion losses. This study was conducted in the Walnut Gulch Experimental Watershed. It was accomplished by using specific clay enrichment ratio data as indicators of sediment delivery in combination with a sediment yield index determined form measured aggregation index (erodibility) data weighted on the basis of relative area occupied by a given soil mapping unit. The results support the accuracy of a potential sediment yield index approach for identifying suspended sediment sources at soil mapping unit scales.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2011, vol. 87, n°. 2, p. 172-181, nombre de pages : 10, Références bibliographiques : 37 ref.

Date :
2011

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

Langue :
Anglais